The adventures in time and space of the Doctor, a Time Lord who changes appearance and personality by regenerating when near death, and is joined by companions in battles against aliens and other megalomaniacs.
Genre: Adventure, Drama, Family
Cast:William Hartnell , Patrick Troughton , Jon Pertwee , Tom Baker , Frazer Hines , Nicholas Courtney , Pat Gorman , Elisabeth Sladen , Jacqueline Hill , William Russell , Katy Manning , John Scott Martin , John Levene , Peter Davison , Janet Fielding , John Leeson , Terry Walsh , Gerald Taylor
Two schoolteachers investigate the personal life of one of their brilliant students and her mysterious grandfather.
The TARDIS takes its new passengers back to the dawn of history. There, the Doctor and his party are captured by a tribe who are trying to rediscover the secret of fire.
Old Mother frees the Doctor and the others on condition they will leave the tribe and not make fire.The group attempt to return to the TARDIS but Za and Hur follow them.
Kal accuses Za of Old Mother's murder but the Doctor exposes him as the real killer.However, Za then insists the travellers be held prisoner until they show him how to make fire.
The TARDIS lands in a petrified forest on an alien planet. Determined to explore, the Doctor leads his companions into the metal city, where they discover the danger of what will become his deadliest enemies, the mutant Daleks. (Originally broadcast in seven parts.)
The Doctor, Susan and Ian search the city for Barbara and learn that the area is contaminated with radiation.Then they encounter the Daleks.
Susan meets Alydon of the Thals and agrees to try and arrange a treaty between his people and the Daleks. But the Daleks only see it as an opportunity to wipe the Thals out.
The Doctor and his friends attempt to escape from the Dalek City. However, knowing that the Thals are walking into a trap, Ian decides to go and warn them.
The Doctor and his friends realise that their only chance of recovering the fluid link is to persuade the Thals to fight back against the Daleks.
While Ian, Barbara and their Thal friends try to find a way into the Dalek City through the mountains, the Doctor, Susan and Alydon attempt to make their own way in.
Ian, Barbara and the surviving members of their party try to find a way into the Dalek City whilst Alydon prepares the other Thals for an attack. But only the Doctor and Susan are aware of the full extent of the threat the Daleks pose.
In this completely TARDIS-based story, the crew find themselves and their ship acting very strangely indeed. Blame runs high for the Ship's unusual behavior, until the Doctor realizes the TARDIS itself may be trying to warn them... (Originally broadcast in two parts; also known in fan circles as "Inside the Spaceship.")
The Doctor becomes increasingly suspicious of Ian and Barbara but when the occurrences aboard the TARDIS become even stranger he realises they are in even greater danger than they realised.
The TARDIS arrives on Earth in the 13th century, where it is claimed by famed explorer Marco Polo as a gift for his employer, Kublai Khan. Polo hopes to finally buy his way out of the Khan's service - but if he succeeds, the Doctor and his friends will never be able to get back to their Ship ever again... (Originally broadcast in seven parts.)
Tegana sabotages the party's water bags, leaving them in dire need of fresh supplies.
The Doctor and Susan are able to supply Marco with condensation that has formed inside the TARDIS, saving the group from dying of thirst.When the group are reunited with Tegana, the travelers begin to suspect he is up to something.
The Doctor's group manage to rescue Barbara from the Mongols but once more Marco remains unaware of Tegana's involvement.
The Doctor and his friends elect to warn Marco of Acomat's attack even though it means losing their chance to gain access to the TARDIS.
The Doctor, Ian and Barbara are forced to surrender to Tegana and Marco, leaving both of them the opportunity to gain possession of the TARDIS.
Tegana finally makes his move to assassinate the Khan, giving the Doctor and his friends an opportunity to thwart his plans and regain the TARDIS.
On the planet Marinus, the Doctor and his companions are enlisted by Arbitan to seek out the keys to an ancient and powerful machine. Their quest takes them across time and space; will they be able to return the keys before Marinus falls under the control of the alien Voord? (Originally broadcast in six parts.)
The Doctor and his friends arrive in the apparently idyllic city of Morphoton but Barbara soon begins to realise there is more to their hosts than meets the eye.
The search for the second key takes the travellers to a jungle where Ian and Barbara come under threat from rapidly growing plants.
Searching for the third key, Ian and Barbara meet with the sinister trapper Vasor before following Susan and the others into a cave system guarded by the mysterious Ice Soldiers.
The group are reunited with the Doctor in the city of Millennius where Ian faces trial for murder after the fourth key is stolen.
The Doctor and his friends must locate the real murderers and the fourth key before heading off for a final confrontation with the Voord.
The TARDIS arrives on Earth landing in 16th century Aztec society. Barbara goes off exploring - despite the Doctor's orders not to wander off - and is taken away by the high priest Autloc who believes she is the reincarnation of the goddess Yetaxa. They believe it is a sign that the rains - which are late - will now come. The high priest of sacrifice Tlotoxl recruits Ian to lead their army but he finds he has a rival in Ixta. Ian is less than comfortable with his role when he learns that they are to deliver the human sacrifice to the high priest at the rain ceremony. The Doctor emphasizes that they must not interfere with Aztec rituals, something that does not sit well with Barbara.
Barbara tries to change the course of history - and Ian fights for his life.
While the Doctor tries to find a way back to the TARDIS, Tlotoxl continues to plot Barbara's downfall and sees an opening when Susan questions Aztec custom.
Tlotoxl's machinations result in both Susan and Ian being arrested.With the TARDIS once again trapped inside the tomb, the travelers' only hope for escape lies with Autloc and Cameca.
The TARDIS arrives aboard a spaceship that has been captured by the Sensorites, a hearing-sensitive alien race. The Sensorites are dying, and the Doctor finds himself forced to investigate the origin of the mysterious illness. (Originally broadcast in six parts.)
The ship has been boarded by the Sensorites and the race is on to retrieve Susan and Barbara before they can find them.
The Doctor, Susan and Ian agree to accompany the Sensorites to their home planet in the hope of finding a cure for John. But not everyone is willing to welcome them there.
With Ian having fallen victim to the Sensorites' plague, the Doctor is desperate to find a cure. But the City Administrator is still determined to rid his world of aliens.
The City Administrator is determined to destroy the Doctor and his friends and his paranoia prevents the Doctor's cure from being distributed.
While the City Administrator's schemes reach their climax, the Doctor and Ian venture into the tunnels under the city to discover the real cause of the Sensorite plague.
The TARDIS lands during the French Revolution, where Ian, Barbara, and Susan become caught up in the politics of the day. When they are arrested and set to be executed, the Doctor must take on the disguise of a public official to try and save their lives. (Originally broadcast in six parts.)
Susan, Ian and Barbara are sentenced to be guillotined but an encounter with a dying English prisoner may offer Ian a chance of survival.
Susan and Barbara are rescued by Jules and Jean, two members of the escape chain, while the Doctor gains access to the prison by posing as a revolution official.
The Doctor is forced into a meeting with Robespierre while Barbara's attempts to find a physician for Susan result in them being betrayed.
Ian finds himself held prisoner by the treacherous Leon while the Doctor attempts to engineer Susan and Barbara's escape.
Ian finally delivers his message to James Stirling but in order to secure Susan's release he and Barbara are forced into a dangerous spying mission.
When the TARDIS malfunctions and the doors open in the time vortex, the travelers and their Ship shrink to the size of insects. When they arrive on Earth, they uncover a murderous plot involving a new insecticide - but how can they stop the crime in their miniaturized condition? (Originally broadcast in three parts.)
Ian and Barbara are accidentally taken into Smithers' laboratory and, while the Doctor and Susan face a hazardous journey to reach them, they witness the deadly effects of DN6 first hand.
The Doctor and his friends face a race against time to expose Forrester's plans and return to normal size before Barbara succumbs to the effects of DN6.
Ian and Barbara believe the TARDIS has finally returned to their contemporary London, but soon discover signs of plague and warfare. Their old enemies, the Daleks, have invaded the Earth of the 22nd century. Separated and fighting for their lives, the travelers must try to aid the remaining humans and overthrow the Daleks' cruel tyranny. (Originally broadcast in six parts.)
The Doctor and Ian are taken to the Dalek saucer while Susan and Barbara join the rebels in planning an attack.
The Doctor manages to escape from the Dalek saucer and meet up with Susan and David but Ian is left trapped onboard. Meanwhile, Barbara and her new friends face a dangerous journey across London.
While Susan and David try to find a way out of London, Ian and Larry infiltrate the Dalek mine workings.
The Doctor's party investigate the Daleks' central control in Bedfordshire while Barbara and Jenny's attempt to reach it are derailed when they are betrayed.
The Daleks' plan to transform Earth into a giant spaceship and wipe out its inhabitants is nearing completion and the Doctor and his friends face a race against time to prevent them from destroying the planet's core.
On the planet Dido, the monstrous Koquillion terrorizes Bennett and Vicki, the only survivors of a crashed spaceship. When the TARDIS lands, the Doctor, Ian, and Barbara team up with Vicki to discover what Koquillion is hiding. (Originally broadcast in two parts.)
The Doctor and Ian reach the crashed spaceship and meet up with Barbara and Vicki, where the Doctor uncovers the truth about Koquillion.
The travelers decide to take a holiday near ancient Rome, but after a month the Doctor gets restless. He and Vicki determine to visit Rome, and while they are gone Ian and Barbara are abducted by slave traders. All roads lead to Rome, however, and the travelers find themselves at the mercy of the country's petulant emperor, Nero... (Originally broadcast in four parts.)
While the Doctor and Vicki meet with Nero, Barbara is taken to Rome to be sold while Ian is forced to work as a galley slave.
Ian and Delos are forced to fight each other for their freedom while the Doctor has to perform for Nero's court.
Ian and Delos manage to escape from Sevcheria and Tavius agrees to help Barbara rejoin them.The Doctor's attempts to avoid being thrown to the lions inadvertently result in Nero deciding to burn down Rome.
The TARDIS is drawn by a mysterious force and lands on the alien planet Vortis. There the Doctor, Ian, Barbara and Vicki find themselves caught up in a war between an evil force known as "The Animus", its ant-like Zarbi allies, and the butterfly-like Menoptra race and their allies the subterranean Optera.
The Doctor, Ian and Vicki are captured by the Zarbi while Barbara meets up with the butterfly-like Menoptera who are trying to reclaim the planet.
The Doctor is forced to co-operate with the Animus but Ian uses the opportunity to make an escape attempt.
Ian and Vrestin are captured by the subterranean Optera while Barbara and her Menoptera allies attempt to escape from the slave camp.
Barbara and the surviving Menoptera take refuge in the Temple of Light while the Doctor and Vicki attempt to escape by taking control of a Zarbi.
The Doctor and Vicki are taken before the Animus but the isoptope is left behind in the laboratory.The only hope of victory lies with Barbara and her Menoptera allies.
The TARDIS lands in the Holy Land during the Third Crusade and the crew help save Richard the Lionheart from an ambush, but Barbara is captured and brought before Saladin.
While the Doctor, Ian, and Vicki are drawn into the intrigues of King Richard's court, Barbara has to cope with an impatient Saladin and the vengeful El Akir.
Barbara allies herself with a man whose were murdered by El Akir as the Doctor and Vicki are caught up in Richard's plan to offer his sister's hand in marriage to Saladin's brother.
Ian sets out with a reluctant accomplice to rescue Barbara from El Akir's palace as the Doctor and Vicki try to evade the suspicions of the Earl of Leicester.
The TARDIS arrives on a planet that has been turned into a space museum but the Doctor and his friends are puzzled when they find themselves out of phase with their surroundings.
Now back on their proper time track, the Doctor and his friends must work to avoid the future they saw for themselves.
With the Doctor missing, Ian, Barbara and Vicki find themselves in danger from the Moroks while the Xerons also try to make contact with them.
While Ian tries to force Lobos to release the Doctor from the museum, Vicki joins the Xerons in trying to gain the weapons needed to start a revolution against the occupiers.
The Doctor has obtained a Time and Space Visualizer, which has a TV screen that can show scenes in the past to order. Lincoln, Shakespeare and the Beatles are selected. They land on a barren planet with two suns, and become separated. A sandstorm causes the Doctor and Barbara to lose the TARDIS, Ian and Vicky meet an octopus-like monster, and the Daleks arrive, still hunting for them.
While Ian and Vicki are threatened by a Mire Beast, the Doctor and Barbara meet up with the Aridians...who are then ordered to hand them over to the Daleks.
The TARDIS crew's attempts to escape from the Daleks take them to the top of the Empire State Building and a 19th century sailing ship.
The TARDIS lands in a haunted house where the Doctor and his friends are confronted by Dracula and Frankenstein's Monster...and then the Daleks appear.
With Vicki trapped on board the Dalek time machine, the Doctor, Ian and Barbara decide to make their stand on the planet Mechanus.
The Doctor and his friends are taken into the Mechanoid City but their troubles are far from over...especially when the Daleks launch an attack.
The Doctor, Vicki, and Steven Taylor, go to 1066 England, but something doesn't seem right including modern inventions like a Gramaphone and electricity. Could there be another time traveller?
The Doctor is being held prisoner by the Monk and Steven and Vicki's search for him brings them to the Saxon village.But a greater danger threatens when a Viking raiding party arrives.
The Doctor manages to escape from his cell and get the upper hand on the Monk but his plans are derailed when Sven and Ulf arrive at the monastery.
The Doctor finally discovers what the Monk is up to and must move fast to prevent his opponent from altering the course of history.
After an encounter with a hostile robot called a Chumblie, the Doctor and his companions are rescued by a group of female Drahvins.
With the knowledge that the planet will be destroyed in two days, the Drahvins instruct the Doctor to help them steal the Rills' ship.
The Doctor and Vicki encounter the Rills and learn the situation is more complex than they thought while Steven finds the Drahvins' hospitality ever more perilous.
The Doctor and Vicki enlist the aid of the Chumblies to rescue Steven from the Drahvins and then find a way off the planet before its destruction.
Whilst The Doctor, Steven and Vicki are traveling to their next destination, on the planet Kembel, Marc Cory, a Space Security Service agent discovers The Daleks are attending a secret meeting with their allies. Where Cory discovers the Dalek's evil plan, which sets the stage for the epic 12-part adventure "The Dalek Master Plan".
The TARDIS lands in the middle of the Trojan War, where the Doctor is mistaken for the god Zeus.
While Odysseus forces the Doctor to find a way to win the war, Steven decides to get himself taken prisoner in order to enter Troy and find Vicki and the TARDIS.
With Steven and Vicki being held prisoner by the Trojans, the Doctor's only hope of seeing them again is to suggest the idea of the Trojan Horse.
The Doctor waits inside the Trojan Horse for a chance to reach his companions but Steven's assumed identity as a Greek soldier and Vicki's growing feelings for Troilus endanger their escape.
The Doctor runs afoul of the Daleks and Special Security Agent Bret Vyon on the planet Kembel.
The Doctor infiltrates the Daleks' conference to try and discover their plans, leaving Steven, Katarina and Bret to find a way off the planet.
The Doctor and his friends escape Kembel in the Spar ship but the Daleks force them down on the planet Desperus, where they are threatened by a group of convicts.
With Katarina being held hostage, the Doctor, Steven and Bret are in danger of having to given in to Kirksen's demands, while, on Earth, Chen has them listed as traitors.
The Doctor, Steven and Sara are accidentally transported to the planet Mira where Chen sends the Daleks after them.
The Doctor, Steven and Sara escape Mira in a Dalek pursuit ship but when they find the ship is returning to Kembel, they are forced to come up with a new plan to avoid the Daleks.
The Doctor, Steven and Sara visit a Liverpool police station on Christmas Day and a Hollywood film set during the 1920s.
The Daleks realise the Doctor has given them a fake Taranium Core while, on the planet Tigus, the Doctor encounters the Meddling Monk.
The Doctor, Steven and Sara travel to Ancient Egypt, pursued by both the Daleks and the Meddling Monk.
Steven, Sara and the Monk are captured by the Daleks in order to force the Doctor to hand over the Taranium Core.
The Doctor, Steven and Sara reach Kembel where they find the Daleks have betrayed their allies and imprisoned them.
With the Daleks poised to invade the solar system, the Doctor decides his only option is to activate the Time Destructor prematurely, threatening the entire planet.
The TARDIS lands in sixteenth century Paris and Steven becomes involved with a group of Huguenots.
While trying to find the Doctor, Steven discovers a conspiracy to assassinate a man known as the Sea Beggar.
Steven has discovered the identity of the Sea Beggar, but can he warn the Huguenots in time?
Steven rejoins the Doctor and they leave Paris just ahead of the massacre, leaving Anne behind.
The Doctor, Steven and Dodo arrive on a giant spaceship millions of years in the future, transporting the last humans away from the doomed Earth.
With the Ark infected with a cold virus, the Doctor must convince the Guardians to trust him so he can find a cure.
The Doctor, Steven and Dodo have traveled 700 years into the future and find that the Ark is now under the control of the Monoids as it approaches Refusis.
The Monoids abandon the Ark, leaving Steven and the Guardians to die, but a mutiny in their ranks may give the Doctor a chance to bring about peace.
The Doctor, Steven and Dodo arrive in the realms of the Celestial Toymaker, who forces them to play his deadly games.
While the Doctor continues to play the Trilogic Game with the Toymaker, Steven and Dodo are involved in a deadly game of musical chairs.
Steven and Dodo are forced to cross the dancing floor, where the Toymaker's dolls plan to force them to dance for eternity.
As the Doctor nears the end of his game against the Toymaker, Steven and Dodo take on Cyril in a lethal game of hopscotch to try and recover the TARDIS.
The TARDIS arrives in Tombstone, Arizona in 1881. Where the Doctor is looking for a dentist when he has a toothache, where The Doctor finds the local dentist is the famous Doc Holliday who is in a feud with The Clanton Brothers and their hired gunfighter Johnny Ringo, whilst local sheriff Wyatt Earp is trying to keep the peace. The Doctor, Steven and Dodo find themselves joining forces with The Clanton Brothers and Sheriff Wyatt Earp.
With the Clantons believing the Doctor to be Doc Holliday, Wyatt Earp takes him into protective custody but this leaves Steven and Dodo in danger.
Earp comes to Steven's rescue and arrests Phineas Clanton, prompting the Clantons to decide to enlist the help of Johnny Ringo.
The Clantons have shot Warren Earp, leading to a showdown between the two families with the Doctor powerless to prevent bloodshed.
The Doctor, Steven and Dodo arrive in the far future and are welcomed by the advanced civilisation of the Elders but soon begin to suspect they are hiding a secret.
The Doctor, Steven and Dodo investigate why there are Savages in the Elders' city and uncover the true price of the Elders' perfect society.
The Doctor has been subjected to the Elders' extraction process and Steven and Dodo must return to their city to rescue him.
The Doctor urges the Savages to finally bring an end to the Elders' oppression and enlists the help of an unlikely ally.
The Doctor and Dodo return to London in the present day where the Doctor becomes concerned about WOTAN, a new super-computer installed in the Post Officer Tower.
Dodo is under the control of WOTAN and attempts to lure the Doctor into a trap, while the rest of WOTAN's slaves begin construction on its robotic War Machines.
Ben tries to escape from the warehouse but is captured by Polly, who is now also under WOTAN's control, and forced to work on construction the War Machine.
The first War Machine is defeated but the Doctor only has a matter of hours to destroy WOTAN before the rest of its army is activated.
The Doctor discovers Polly and Ben aboard the TARDIS shortly before the ship arrives in 17th century Cornwall, where the local churchwarden gives the Doctor a cryptic message shortly before being murdered.
Pike is convinced that the Doctor knows the location of Avery's treasure while Polly and Ben try to convince the locals they were not responsible for Longfoot's murder.
Polly and Ben are placed in the custody of Blake, who reveals he also has his suspicions about the Squire, while the Doctor and Kewper are forced to team up to escape from Pike's ship.
The Doctor and his friends are at the mercy of Cherub, who is now seeking Avery's treasure for himself, while Pike prepares to attack the village.
In December 1986, a new planet appears in the Solar System which turns out to be a long-lost twin of Earth's named Mondas. Its inhabitants are the Cybermen.
The Doctor's warnings are ignored and the Cybermen take over the base, hampering the crew's efforts to help Zeus IV.
With the Doctor out of action, it is up to Polly, Ben and Barclay to stop Cutler using the Z-Bomb and devastating half the world.
The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.
The TARDIS arrives on the Earth colony of Vulcan where the newly-regenerated Doctor assumes the identity of an Earth Examiner.
While the Doctor worries about the inert Daleks in the capsules, Lesterson makes plan to reactivate one of them.
The Doctor fails to convince the colonists of the danger posed by the Daleks and soon the other two are also reactivated.
With Polly being held prisoner by the rebels, the Doctor and Ben decide to investigate them, while Lesterson discovers the Daleks are reproducing.
The Doctor and Quinn attempt to escape in order to stop Bragen using the Daleks to take over the colony.
With Bragen having taken over, the Daleks trick the rebels into turning them loose and only the Doctor can stop them wiping out the entire colony.
The Doctor, Polly and Ben arrive in 1746, in the aftermath of the Battle of Culloden, and are captured by a group of Highlanders shortly before they themselves are captured by redcoats.
Polly and Kirsty capture Lieutenant Ffinch to try and enlist his help while the Doctor tricks Gray in order to escape.
With the Highlanders imprisoned aboard Trask's ship, the Doctor attempts to expose Grey's plan.
Ben manages to join up with the Doctor, Polly and Kirsty and together they work to free the Highlanders from Trask's ship before Grey sells them into slavery.
The TARDIS materialises on a deserted beach where the Doctor and his friends are captured by primitive warriors and taken to the fabled city of Atlantis.
While Ara tries to save Polly from being turned into a Fish Person and Ben and Jamie try to escape from the mines, the Doctor discovers the full extent of Zaroff's plans.
The Doctor and Ramo are sentenced to be sacrificed to the goddess Amdo and must escape to put a stop to Zaroff's plan.
With Zaroff's plan nearing completion, the Doctor and Ben realise the only way to save the world is to destroy Atlantis.
The TARDIS arrives on the Moon in the year 2070. When Jamie is injured, the other travellers are forced to seek the help of a moonbase afflicted with a space plague.
The Doctor and his friends attempt to convince the Moonbase crew that the Cybermen are responsible for the disappearances and find a cure for the plague.
The Cybermen take over the Moonbase and begin using the Gravitron to attack Earth but Polly, Ben and Jamie come up with a way to fight back.
With the Cybermen preparing to launch a full attack, the Doctor and his friends must keep the Moonbase and the Gravitron out of their hands until help arrives from Earth.
The TARDIS arrives at a holiday camp company with the crew worried by a prediction of giant crabs and the Doctor becomes interested in the apparent madman Medok's stories of creatures that roam the colony at night.
The Doctor is unable to convince the colonists that the Macra exist and an attempt to brainwash his companions results in Ben betraying his friends.
The Doctor, Polly and Jamie are sentenced to work in the pits and an escape attempt sees Ben's loyalties called into question again.
The Doctor and Polly manage to save Jamie from the Macra and then try to show the Pilot who is really in charge of the colony.
The TARDIS materialises on the runway of Gatwick Airport, where Polly witnesses a murder only to be kidnapped before she can report it.
With Polly having apparently forgotten them, the Doctor, Ben and Jamie decide to carry out their own investigation of Chameleon Tours.
The Doctor, Jamie and Sam manage to convince Crossland to trust them and he persuades the Commandant to let them continue their investigation.
When Spencer attempts to kill them, the Doctor, Jamie and Sam become convinced Chameleon Tours are hiding something and Sam decides to book a ticket on one of their flights.
Jamie finds himself aboard the Chameleons' satellite and meets their Director while the Doctor forces the Chameleon Meadows to tell him the aliens' plans.
The Doctor and Pinto are captured by the Chameleons but the Doctor manages to use their dependence on their human originals to create dissent in their ranks.
Trying to find the stolen TARDIS, the Second Doctor and Jamie are lured into a trap by the Doctor's old enemies the Daleks.
The Doctor and Jamie investigate Waterfield's antiques shop, where they are knocked unconscious and transported back to the 19th century.
As part of the Daleks' experiment, the Doctor manipulates Jamie into attempting to rescue Victoria.
Jamie and Kemel team up to try and find Victoria, while the Doctor and the Daleks continue to monitor their progress.
With the experiment at an end, the Doctor begins to suspect the key to rescuing Jamie, Victoria and Kemel from the Daleks lies with Terrall.
The Doctor, Jamie and Waterfield follow the Daleks to Skaro, where they discover an unforeseen consequence to their experiment.
The Daleks are poised to spread the Dalek Factor throughout the history of Earth and begin by implanting the Doctor.
The Doctor, Jamie and Victoria arrive on Telos, where an archaeological group are exploring the Tomb of the Cybermen. But are the Cybermen as dormant as they believe?
The archaeologists learn they are stranded on Telos and Klieg suggests they use the opportunity to explore the Cybermen's tombs.
The Cybermen have been revived and plan to convert the archeologists into their own kind, prompting Hopper to attempt a rescue.
Klieg attempts to do a deal with the Cybercontroller while the Doctor tries to find a way to refreeze the Cybermen permanently.
When the TARDIS materialises in the Himalayas, the Doctor decides to pay a return visit to the nearby Det-Sen monastery only to be accused of murder.
Jamie and Victoria make their way to the monastery shortly before it is attacked by the Yeti.
While the Doctor and Jamie return to the TARDIS for equipment, the control sphere Jamie brought to the monastery is reactivated.
The Yeti escapes from the monastery and Victoria and Thonmi are accused of assisting it, while the Doctor and Jamie endure a perilous journey back across the mountains.
Victoria falls under the mental influence of Padmasambhva as the Yeti attack in order to drive the monks from the area.
With the Great Intelligence on the verge of becoming corporeal, the Doctor challenges Padmasambhva to a mental battle in order to defeat it.
The Doctor, Jamie and Victoria are brought to a base which is attempting to halt the flow of the Second Ice Age.
Varga revives and takes Victoria hostage as he works to revive his crew while the Doctor and Jamie find Penley stealing medical supplies.
Jamie and Arden venture out to rescue Victoria only to find the rest of the Ice Warriors are now active.
The Doctor leaves the base to try and find Jamie and Victoria while Storr tries to do a deal with the Ice Warriors.
The Doctor and Victoria are both held prisoner by the Ice Warriors as Varga decides to take over Brittanicus.
The Doctor and Victoria attempt to force the Ice Warriors to surrender control of the ioniser before the ice flow destroys them.
After the Doctor is attacked by a group of mysterious gunmen, he discovers he is the physical double of the famous scientist Salamander.
Jamie and Victoria agree to accompany Astrid to Hungary to observe Salamander's activities.
Jamie and Victoria join Astrid into attempting to rescue Denes but Salamander becomes suspicious of them.
Fariah brings the Doctor and Kent evidence of Salamander's activities but then they come under attack from Benik.
The Doctor persuades Bruce to help him infiltrate Salamander's research centre while Salamander takes drastic action to prevent Swann finding out the truth.
The Doctor discovers the true link between Salamander and Kent while Astrid tries to convince the shelter inhabitants they have been lied to.
The TARDIS becomes trapped in space before ending up in an underground station of a mysteriously deserted London.
Jamie and Victoria are reunited with Travers before Jamie joins the soldiers in attempting to find out what has happened to the Doctor.
The Doctor and Victoria are taken back to the Goodge Street base by Colonel Lethbridge-Stewart where the Doctor becomes convinced there is a traitor in their midst.
With Travers having been captured by the Yeti, the Doctor attempts to find a way to gain control of the robots while Lethbridge-Stewart tries to recover the TARDIS.
Victoria and Travers are held prisoner by the Great Intelligence, who is planning to drain the Doctor's mind.
The Doctor and his friends are held prisoner by the Intelligence and their only hope lies with Jamie, Arnold and a reprogrammed Yeti.
The Doctor, Jamie and Victoria are taken prisoner by the staff of a gas refinery, who have lost contact with their drilling rigs and experienced mysterious drops in pressure.
Harris asks for the Doctor's help with Maggie with Van Lutyens and the Chief Engineer attempt to find out what is blocking the impeller.
While the Doctor begins his investigation into the weed creatures, Robson is attacked by one at the refinery.
Van Lutyens' investigation of the base of the impeller places the Doctor and Jamie in danger from the Weed Creature.
With the Weed Creature poised to burst out of the pipeline and attack the base, an encounter with Oak and Quill gives the Doctor a vital clue about its weakness.
The Doctor and Jamie rescue Victoria from Robson and realise they can destroy the Weed Creature with sound waves.
The Doctor and Jamie arrive on a mysterious spacecraft whose only occupant is a dangerous Servo Robot.
The Doctor and Jamie are brought aboard the Wheel where Jamie is horrified to learn the crew plan to destroy the Silver Carrier with the TARDIS on board.
Jamie sabotages the Wheel's x-ray laser, unknowingly giving the Cybermen an opportunity to reach the Wheel.
The Cybermen instruct their human slaves to smuggle them onto the Wheel while the Doctor attempts to convince Bennett of the threat they pose.
The Cybermen gain control of more members of the Wheel crew and the Doctor realises the only way to stop them is for Jamie and Zoe to make a dangerous space walk.
Jamie and Zoe attempt to recover the time vector generator while the Cybermen realise the Doctor is on the Wheel and make him their prime target.
The TARDIS arrives on the planet Dulkis where the Doctor, Zoe and Jamie decide to have a quiet holiday. Only to find the Evil Dominators and their robotic slaves, The Quarks have arrived on a radioactive island, where they plan to detonate a bomb in the planet's core, which will turn the entire planet as source of radioactive fuel for their invasion fleet.
The Doctor and Jamie are captured by the Dominators, who subject them to an intelligence test, while Zoe and Cully attempt to convince the Dulcian council of the threat.
Zoe and Cully are captured by the Dominators and put to work alongside the survey team while the Doctor and Jamie decide to return to the island to help.
The Doctor and Zoe are interrogated by Rago, who is planning to present his terms to the Dulcian council, while Jamie and Cully try to find a way to strike back against the Quarks.
Jamie and Cully manage to rescue the Doctor's party and together they try to find a way to stop the Dominators before they destroy the entire planet.
The TARDIS arrives in a white void after making an emergency escape from the volcanic eruption on Dulkis.
With the TARDIS destroyed, the Doctor, Jamie and Zoe find themselves in a strange forest patrolled by mysterious soldiers.
The Doctor realises that the travelers are trapped in a world where fiction is real and where creatures are a threat if people believe in them.
The Doctor, Jamie and Zoe reach the citadel at the centre of the land, where they finally encounter the Master of the Land of Fiction.
With Jamie and Zoe having been turned into fiction, the Doctor must find a way to save them without suffering the same fate or becoming part of the Master Brain.
The Doctor and the newly formed UNIT must stop a Cybermen Invasion and a Sinister Industrialist in league with them
The Doctor and Jamie are taken prisoner by their mysterious observers and have a reunion with an old friend while Zoe and Isobel carry out their own investigation of IE.
The Doctor and Jamie return to the IE factory in search of Zoe and Isobel, where they meet with Professor Watkins and fall foul of Vaughn.
The Doctor and Jamie enlist the help of UNIT to rescue Zoe and Isobel before trying to find out what Vaughn is really up to.
The Doctor and Jamie tell the Brigadier about the Cybermen but with Rutledge under Vaughn's control he is powerless to act.
Captain Turner manages to rescue Jamie and the others, while the Doctor begins working on a way to protect everyone from the Cybermen's hypno-sound signal.
With the entire world unconscious apart from the Doctor and his friends, the Cybermen are poised to invade and only Zoe, the Brigadier and a missile crew can stop them.
The Cybermen are here to take over the world, and for the first time, UNIT are here to deal with the threats of a global invasion of a very alien and robotic kind. With locations shots of a nineteen sixties London to enhance realism and a new and fresh, contemporary look for the Cybermen, these episodes were considered a landmark and turning point in the Doctor Who franchise that has a sinister industrialist working in league with the dreaded Cybermen. It is now up to the Doctor and the United Nations Intelligence Taskforce to thwart their plans in eight new exciting and action filled chapters'.
The TARDIS lands on a nameless desolate planet where The Doctor, Jamie and Zoe learn the native Gonds are ruled by the mysterious and unseen Krotons, where The Krotons chooses their top students to join The Krotons in their machine as their companions. But The Doctor, Jamie and Zoe discover The Krotons are crystalline alien beings and are turning The Gonds mental power into energy and are feeding off it.
Zoe is selected as a companion for the Krotons and the Doctor insists on joining her.
Jamie is held prisoner by the Krotons who intend to recapture the Doctor and Zoe for their mental energy.
Selris succeeds in drawing the Krotons out of the Dynatrope but Eelek agrees to hand the Doctor and Zoe over to them in return for their leaving the planet.
21st century Earth is entirely dependent on the T-Mat transport system but the control centre on the moon has stopped functioning. Meanwhile, the Doctor, Jamie and Zoe meet the one man who can solve the crisis.
Eldred agrees to supply a rocket for travel to the moon and the Doctor, Jamie and Zoe volunteer to crew it.
The Doctor, Jamie and Zoe make it to the moon and join forces with Phipps but the Ice Warriors have gained control of T-mat.
The Ice Warriors' seed pods beginning materialising all over the globe while Slaar decides to kill the Doctor by T-matting him into space.
The Doctor and his allies manage to return to Earth via T-mat only to find the Ice Warrior has attacked the weather control station.
The Doctor manages to create a rain storm to destroy the Martian fungus before trying to find a way to stop the Ice Warriors' invasion fleet.
Space beacons are being destroyed by pirates, who are salvaging the argonite metal. When the Doctor, Jamie and Zoe arrive on one of the beacons, they are mistaken for pirates.
With the Doctor, Jamie and Zoe trapped on a beacon segment, Hermack becomes suspicious of the unruly prospector Milo Clancey.
The Doctor, Jamie and Zoe flee from the Space Corps with Clancey, who decides to seek refuge on Ta.
The Doctor, Jamie and Zoe are held prisoner by the space pirates while Caven comes up with a plan to throw suspicion onto Clancey.
Madeleine is revealed to be working with Caven, who comes up with a way to kill the Doctor and his friends whilst framing them for the piracy.
With Clancey and Issigri trapped aboard the LIZ, the Doctor, Jamie and Zoe try to convince Madeleine to help them before Caven destroys Ta.
The Doctor, Jamie and Zoe realise they have arrived in the trenches of the First World War, where the sinister General Smythe accuses them of espionage.
The Doctor and Zoe manage to escape from Ransom and attempt to rescue Jamie from the military prison.
The Doctor and his friends realise the area is divided into different time zones and decide to return to the château to obtain a map from Smythe.
The Doctor and Zoe are transported to the control centre of the war games while Jamie and Lady Jennifer fall foul of American Civil War soldiers.
The Doctor attempts to rescue Zoe and Carstairs while Jamie and Lady Jennifer try to convince the resistance of the true nature of Von Weich and the others.
The scientist examines the captured resistance fighters and realises Jamie is a new arrival on the planet while the Doctor, Zoe and Carstairs try to rescue their friends.
The Doctor, Jamie and Carstairs manage to return to the 1917 zone only to be captured by Smythe, who orders the Doctor executed.
The Doctor and the processing machine have been taken by the Aliens but the resistance are making plans to attack the control centre.
To prove his loyalty to the Aliens, the Doctor is ordered to reprocess his friends while the Security Chief finally uncovers evidence of the War Chief's treachery.
The TARDIS is drawn to the planet of the Time Lords where both the Doctor and the War Lord are placed on trial.
As the newly regenerated Doctor arrives on Earth, so does the Nestene.
UNIT's attempts to locate the meteorites are hampered by the mysterious plastic Autons, being constructed by Channing at a nearby factory, while the Doctor makes another attempt to escape from the hospital.
Ransome manages to escape from the plastics factory and alert UNIT, prompting the Doctor and the Brigadier to start an investigation.
With UNIT's investigation being blocked by the Replica of Scobie, the Doctor and Liz visit Madame Tussaud's to try and find out more as Channing prepares to activate the Autons.
The Doctor and Liz are summoned to the Wenley Moor Research Centre by the Brigadier, after several staff members suffer nervous breakdowns.
The Doctor attempts to convince people there are monsters in the caves, prompting Major Baker to start shooting at a reptile man.
The Silurians contact Quinn for help in retrieving their fellow while the Doctor and the Brigadier organise a search of the moors.
With Quinn dead, the Brigadier decides to take an armed party into the caves, prompting the Doctor to contact the Silurians himself.
Worried about the Old Silurian's growing friendship with the Doctor, the Young Silurian has the scientist infect Baker with a virus and then release him.
While the Doctor and Liz try to find a cure to the virus spread by Baker, the Young Silurian kills the Old Silurian and takes control of his people.
While Liz distributes the cure to the virus, the Doctor discovers the Silurians now plan to wipe out humanity by destroying the Van Allen Belt.
While the Brigadier investigates a loss of contact with Mars Probe 7, the Doctor realises signals coming from the probe are of extra-terrestrial origin.
UNIT retrieve the returned Recovery 7 but then Carrington hijacks it while the Doctor and Liz try to decode the signal he sent.
Carrington is holding the astronauts at a secret location but when he takes the Doctor, Liz and the Brigadier there they find they have been kidnapped.
Liz has been captured by Reegan's men and the Doctor begins to suspect Taltalian is more involved than he appeared.
The Doctor decides to take Recovery 7 back into space to search for the missing astronauts but Reegan sabotages the launch.
The Doctor speaks with the alien captain and learns the astronauts sent to Earth were ambassadors. However, before he can alert the authorities he is kidnapped by Reegan.
Carrington is planning to expose the aliens on live television and call for an interplanetary war and the Brigadier must rescue the Doctor and Liz in time to stop him.
The Doctor and UNIT investigate strange happenings at a top secret government drilling project headed by the pompous Professor Stahlman.
The Doctor begins to suspect that penetrating the earth's crust will create more Primords but Stahlman sabotages the computer to stop him proving it.
The Doctor finds himself in a parallel universe where Britain is a dictatorship and the Inferno Project is a slave labour camp policed by his friends' counterparts.
The Doctor attempts to convince the alternate Inferno staff that penetrating the earth's crust will cause a disaster but instead is imprisoned with an infected Bromley.
The earth's crust has been penetrated and, while the Doctor and Greg try to contain the disaster, the Doctor begins to realise the planet has passed the point of no return.
With the parallel earth doomed, the Doctor asks his friends' counterparts to help him return to his own world but the Brigade Leader only sees the TARDIS as a means of escape.
The Doctor is back in his own universe and must stop Stahlman before his earth suffers the same fate as the parallel one.
When a Nestene Energy Unit is stolen and a radio telescope sabotaged, the Doctor is contacted by a Time Lord who tells him his old rival the Master is responsible.
Attempting to find out where Jo encountered the Master, the Doctor heads to the circus where he falls foul of Rossini.
The Doctor and the Brigadier head to Farrel's factory but the Master and the Autons have already left and are distributing plastic daffodils around the country.
The Doctor discovers the plastic daffodils are designed to fire a spray that asphyxiates people, causing havoc prior to the Nestene's arrival, but before he can alert anyone he and Jo are captured by the Master.
The Doctor and Jo head to Stangmoor Prison to investigate the Keller Machine, which drains the evil impulses from prisoners' minds, while UNIT are handling security at the first world peace conference.
The Doctor is recalled by UNIT to help investigate Cheng-Tiek's murder but is unaware that Chin-Lee is under the control of the Master.
Realising Chin-Lee has been using the power of the Keller Machine to carry out assassinations, the Doctor heads back to Stangmoor, only to find the Master has teamed up with Mailer to stage another riot.
With the Doctor and Jo being held prisoner, the Master convinces Mailer to help him steal the Thunderbolt.
The Doctor is forced to help the Master control the mind parasite while Yates finds out where the Thunderbolt has been taken only to be captured by the Master's men.
The Brigadier has recaptured Stangmoor but the Master still has control of the Thunderbolt and the Doctor must find a way to stop him and destroy the Keller Machine.
When a mysterious object lands near the Nuton power complex, UNIT investigate and encounter the Axons, a group of aliens who offer the mineral axonite, which can duplicate matter, as a gift.
The Doctor and Winser begin to analyse axonite while Chinn plots to secure its use exclusively for Britain.
The Doctor and Jo are being held prisoner by Axos while Chinn is forced to organise the worldwide distribution of axonite and the Master returns to the power complex to try and steal the TARDIS.
The Doctor and Jo escape from Axos but then the Doctor offers the Master a deal:if he helps him repair the TARDIS, they can flee Earth together.
The Time Lords takes control of the TARDIS and the Doctor and Jo arrive on a Earth Colony in the 25th Century, where a ruthless mining company are using a dinosaur-like creature to force the colonists to leave the planet. Where the Doctor and Jo learn that The Master is on the planet and is in search of a doomsday weapon that is hidden somewhere on the planet.
The Doctor discovers an Interplanetary Mining Corporation ship has landed on the planet in order to mine its duralinium, while Norton begins causing trouble at the colony.
The Doctor makes it back to the colony and warns Ashe what Dent is up to but when Jo and Winton try to find proof they are captured.
The Doctor descends into the Primitive city to try and find Jo while the colonists receive a visit from the Adjudicator.
The Master offers to help the colonists in exchange for information on the Primitive city and forces the Doctor to act as a guide by taking Jo hostage.
The Doctor and the Master are taken into the Primitive city, where the Master hopes to find the doomsday weapon, while Dent forces the colonists to leave the planet even though their ship is likely to explode.
The Master raises the Devil. The Doctor becomes a wizard.
With the Doctor frozen by the energy release from the barrow, Jo calls Yates and Benton for help, but when the Brigadier tries to join them he finds the village surrounded by a heat barrier.
The Doctor explains to his friends that the Master is trying to gain the power of the last of the Daemons, a race who influenced Earth's development, while the Master brings the rest of the village under his control.
The Master orders Bert to set a trap for the Doctor at the village while a concussed Jo makes for the cavern.
The Master decides to sacrifice Jo to Azal and when the Doctor and his friends try to intervene they come under attack from Bok.
When someone tries to assassinate diplomat Sir Reginald Styles, UNIT investigate the possibility his attacker came from the future.
Jo uses the guerrillas' time machine to travel to the 22nd century where the Controller tricks her into telling the Daleks where she's come from.
The Doctor forces the guerrillas to take him to the 22nd century where he is soon captured by the Controller.
The guerrillas infiltrate the Daleks' base to rescue the Doctor and Jo and ask them to return to their own time and alter history before the 20th century is plunged into a Third World War.
The Doctor and Jo arrive on the medieval planet Peladon, where the Doctor is mistaken for the Earth Delegate of the Galactic Federation and Jo is mistaken for a princess. Where the Doctor uncovers a conspiracy, as he exposes the evil scheme of the high-priest Hepesh who bids to prevent King Peladon from joining the galactic Federation.
The Doctor is convinced the Ice Warriors are trying to sabotage the conference but his attempts to prove it see him accused of sacrilege.
The Doctor is sentenced to fight Grun to the death and his attempt to escape leads to an encounter with Aggedor.
Hepesh's plan has been exposed but he is still determined to prevent Peladon joining the Galactic Federation by leading a rebellion against the King.
The Doctor and Jo visit the Master at his island prison where the Doctor becomes curious about a number of ships sinking in the area.
The Doctor and Jo are trapped on the fort by a Sea Devil while the Master convinces Trenchard to help him steal some electronic components.
The Doctor is held prisoner by Trenchard while the Master attempts to contact the Sea Devils.
The Sea Devils attack the island prison and rescue the Master, prompting the Doctor to venture underwater to try and contact them.
The Doctor is taken to the Sea Devils' underwater colony where he tries to make peace with the creatures, only for the navy to attack the base.
The Sea Devils take over the naval base and the Doctor is forced to help the Master find a way to revive their colony.
The Doctor and Jo arrive on the planet Solos, on an assignment by the Time Lords. The Doctor and Jo learn that the native Solonians are mutating into ant-like mutant creatures and they uncover a conspiracy, where the evil Marshal of the Earth Empire plots to rule Solos for himself and plans to convert the Solos atmosphere, since the planet's atmosphere is poisonous, so the planet can be colonized by the humans He plans to wipe out all the mutated Solonians, who are evolving into an advanced super race.
Ky transports himself and Jo down to Solos and the Marshal only agrees to help her if the Doctor assists Professor Jaeger in altering Solos' atmosphere.
The Doctor and Varan travel down to Solos to search for Jo and Ky but the Marshal orders his men to pursue them.
The Doctor and his friends are led to safety by Professor Sondergaard, who tries to help the Doctor translate the tablets.
The Marshal's premature use of Jaeger's experiment is threatening to destroy Solos' atmosphere and the Doctor returns to Skybase to try and correct the damage.
The Doctor is forced to help the Marshal cover up his actions with the Investigator but Jo and the others attempt to escape to expose him.
UNIT are invited to observe a demonstration of the new TOMTIT machine, unaware its creator, Professor Thascales, is actually the Master.
The Doctor realises the Master is trying to harness the power of Kronos, last of the Chronovores, but is unaware Percival is harbouring him at the institute.
The Master enlists the help of Krasis to control Kronos while Yates tries to bring the TARDIS to the institute only to come under attack from dangers from the past.
The Master prepares to travel back to Atlantis but the Doctor links his TARDIS to the Master's to try and stop him.
Both TARDISes reach Atlantis, where the Doctor befriends King Dalios while the Master enlists the help of Queen Galleia to try and obtain the crystal of Kronos.
The Doctor enters the labyrinth to try and protect Jo from the minotaur but the Master has seized control of Atlantis and prepares to summon Kronos again.
The 10th Anniversary Serial has three incarnations of the Doctor meeting up to face the evil Omega in a universe of antimatter.
The third Doctor and Jo find themselves on an artificial world inside the black hole while the second Doctor tries to find a way to control the organism.
The Time Lord Omega reveals himself to the third Doctor along with plans for vengeance against his own kind.
Omega reveals the purpose behind bringing the Doctor to his antimatter world, but the Doctor(s) discover a startling fact about Omega that he didn't know himself and eventually strike a bargain.
The Doctor attempts to test his new dematerialisation circuit by taking Jo to Metebelis Three but instead the TARDIS arrives in the hold of a 1920s cargo ship.
The Doctor and Jo attempt to find a way out of the Scope but, when Vorg attempts to entertain the Minorans, the crew of the Bernice suddenly become a lot more dangerous.
The Doctor and Jo return to the Bernice to try and aid their escape but find themselves pursued by the Drashigs.
The Doctor escapes from the Scope and joins forces with Vorg to try and save its inhabitants but Kalik is still determined to use the Drashigs to start a rebellion.
The Doctor and Jo discover The Master and the Ogrons are the masterminds behind the Galactic war between the Earth Federation and the Reptillian Draconian Empire and the Master has framed The Doctor and Jo as spies working for the Draconians. Only to discover The Master is also working with the Doctor's greatest enemies, The Daleks, who are also behind the galactic war.
The Doctor and Jo are taken to Earth, where both humans and Draconians believe them to be a spy for the other side.
The Doctor is sentenced to life imprisonment at a lunar penal colony while Jo encounters an old enemy.
The Master rescues the Doctor from the lunar penal colony, aiming to take him and Jo to the Ogrons' planet, and the Doctor's attempt to escape leaves him stranded in space.
The Doctor, Jo and the Master are taken to Draconia, where the Doctor tries to convince the Draconians of the truth. But then the Ogrons attack.
The Doctor, Williams and the Draconian Prince head to the Ogrons' planet to find evidence of the Master's actions but the Master tricks Jo into leading them into a trap.
The TARDIS lands on the jungle planet Spiridon, where the Doctor has fallen into a coma. Before collapsing he has requested the Time Lords to pilot the TARDIS, so he and Jo can follow the Daleks to their base. Jo learns the Daleks' base has been located on Spiridon where they are attempting to discover the secrets of Invisibilty and create a bacterial virus in their goal of universal conquest. When the Doctor recovers, he and Jo are joined by a task-force of Thals and a native Spiridon named Wester. They not only set out to stop he Daleks' evil plot, they also discover an army of 12,000 Daleks are in suspended animation and are waiting to be revived to begin their universal conquest and claim themselves as the supreme rulers of the galaxy.
The Doctor is captured by the Daleks, while Jo is rescued by a friendly Spridon named Wester.
The Doctor and Codal escape from their cell and meet up with the Thal commandos who are trying to get into the Dalek base.
The Doctor and his friends escape from the Dalek base, prompting the Daleks to devise a plan to wipe them out.
The Doctor and his friends ambush two Daleks as part of their planet to get back into the city but the Daleks are on the verge of unleashing their virus.
The Doctor and his friends prepare to refreeze the Dalek army but the Dalek Supreme has arrived on the planet determined to destroy them all.
While the Doctor plans a holiday to Metebelis Three, Jo and the Brigadier are intrigued by a mysterious death at a coal mine in Llanfairfach, which is being blamed on local company Global Chemicals.
The Doctor and the Brigadier attempt to rescue Jo and Bert from the mine but Global Chemicals prove distinctly uncooperative.
The Doctor and Jo manage to escape from the mine with a maggot egg but Stevens is determined to stop them analysing it.
The Brigadier calls in a full UNIT force to deal with the giant maggots while the Doctor infiltrates Global Chemicals to find out what is really going on.
The Doctor manages to escape from BOSS with help from Yates and discovers Cliff has been infected by a giant maggot.
The Doctor attempts to destroy the giant maggots and cure Cliff but the real threat is BOSS, who is poised to take over all the world's computers.
The Brigadier asks the Doctor to investigate the disappearance of several scientists, only for him to find they have been abducted back in time.
The Doctor tracks the missing scientists to Irongron's castle, where Linx is using them to repair his spaceship and construct advanced weapons for Irongron.
The Doctor escapes the castle with Sarah and Hal and must persuade Sir Edward to trust him before Irongron launches an attack on them.
The Doctor attempts to return the scientists to their own time, before Linx tries to use his spaceship and destroys the entire castle.
The Doctor and Sarah return to London in the present day only to find the city strangely deserted, while nearby UNIT are dealing with a series of monster appearances.
The Doctor and Sarah returns to present-day Earth, where they find London has been evacuated, and Dinosaurs are on the loose and they are mistaken for looters. Assisting U.N.I.T in the emergency, The Doctor and Sarah discovers corrupt politician Sir Charles Grover MP, renegade scientists Butler and Professor Whitaker and military officer General Finch are using a time machine to bring the dinosaurs from the past to the present as part of they scheme to bring the human race back to a "Golden Age" before the world was polluted.
Yates sabotages the Doctor's equipment to stop him finding the location of Whitaker's base but then the tyrannosaur escapes, placing Sarah in danger.
Sarah attempts to find a way off the spaceship while the Doctor tries to track down the source of the time displacements.
The Doctor has been framed as the monster maker by Finch and is on the run from the army, while Sarah attempts to alert UNIT to what Grover is up to.
The Doctor is rescued from Finch by the Brigadier and Benton and tries to persuade them to stop Grover before millions of people are erased from history.
As the TARDIS heads to the paradise planet Florana where the Doctor and Sarah go for a holiday, the TARDIS goes off-course and arrives on the barren planet Exxilon, where the TARDIS is losing power. The Doctor and Sarah finds a group of humans and Daleks are searching for parrinium, a mineral which is the only antidote to a space plague. Both parties encounter the native people and trouble ensues. In an attempt to find what caused the power loss, the Doctor, chased by the Daleks, enters the Exxilon's lost city to stop the power-draining phenomenon.
The Doctor and the MSC crew join forces with the Daleks to mine the parrinium, only to come under attack from the Exxilons.
The Doctor and Sarah meet up with Bellal, who helps them escape from the Daleks and explains the origin of the City.
The Doctor and Bellal continue to penetrate the City's defences while Sarah and Jill try to stop the Daleks leaving with the parrinium.
Returning to the medieval planet Peladon (50 years after "The Curse of Peladon") The Doctor and Sarah find King Peladon's daughter Queen Thalira has inherited the throne and the galactic Federation is at war with Galaxy Five and The Federation requires the mineral Trisilicate that will end the war. However, the miners led by the mad rebel Ettis are rebelling and refusing to work, as the ghost of the loyal beast Aggedor is frightening and killing off the miners. It is soon discovered that the ghost of Aggedor is a holographic projection and the culprits are a task-force of renegade Ice Warriors led by Commander Azaxyr and traitorous federation mining engineer Eckersley who have betrayed the Federation to Galaxy Five.
The Doctor is rescued by Gebek, prompting him to try and help the miners, but his advice results in Ettis launching another attack on the armoury.
The Doctor and Sarah pacify Aggedor and the Doctor encourages the Queen to make peace with the miners, but Ortron soon has him under arrest again.
The Ice Warriors take control of the planet and force the miners to return to work but Ettis takes the opportunity to try and destroy the citadel.
Sarah and Alpha Centauri decide to try and alert the Federation to what the Ice Warriors are up to but first they have to escape from the throne room.
The Doctor turns the Aggedor spirit against the Ice Warriors to aid the Peladonians in their battle but Eckersley attacks him with the security system.
While the Doctor carries out an investigation into ESP, Mike Yates asks Sarah to look into some strange goings on at a meditation centre he's attending.
Lupton forms an alliance with the spider to steal the Doctor's blue crystal, while Sarah and Mike attempt to alert people to what they've seen.
The Doctor and Sarah head to the meditation centre to try and get the crystal back while Lupton prepares to return it to Metebelis Three.But all their plans are disrupted when it is stolen by Tommy.
Sarah is captured by the spiders' guards while the Doctor tries to help Arak and the others strike back against the spiders.
The Doctor escapes from the spiders' larder only to encounter the Great One, while Sarah makes a deal with the Queen Spider.
K'Anpo persuades the Doctor he must face his fear and return the crystal to the Great One.But first they need to get past Barnes and his men.
Can the Doctor, now in his fourth incarnation, recover from his post-regenerative trauma to save the Earth from Think Tank and their plot for world domination?
The Doctor and Sarah become convinced Think Tank are behind the electronic component thefts but are unable to stop them carrying out another raid.
Sarah and Kettlewell infiltrate an SRS meeting to try and find out what Miss Winters is up to but there is a surprise in store.
UNIT attempt to get into the bunker to stop Miss Winters setting off the world's nuclear missiles but first they have to get past the K1.
The Doctor's attempt to give Harry a trip in the TARDIS sees the two of them and Sarah arriving onboard a space station in the far future, with some rather deadly security mechanisms.
The Doctor and Harry revive the Ark's medtech, Vira, to help Sarah.But when station commander Noah is revived, he becomes suspicious of the newcomers.
Knowing that Noah has been infected by the Wirrn, the Doctor persuades Vira to halt the reviving of her people, knowing it will place them in danger as well.
The Doctor tries to protect the humans still in cryogenic suspension from the Wirrn, who are determined to use Earth as their new breeding ground.
The Doctor, Sarah and Harry teleports to Earth to ensure the planet is safe for the survivors on-board Nerva Beacon to return to Earth and re-inhabit their world. Only to find a Sontaran named Styre has captured a group of humans and conducting experiments on them to discover the human body's weaknesses, as part of the Sontaran's goal for domination of the galaxy.
The Doctor learns that Styre has been experimenting on the Galsec crewmembers to pave the way for a Sontaran invasion of Earth and decides the only way to halt his plans is to challenge him to a duel.
The Doctor and his companions are sent to the planet Skaro by the Time Lords to prevent the creation of the Daleks.
The Doctor and Harry are taken to the Kaled bunker where Davros is preparing to demonstrate the Daleks, while Sarah is captured by the Thals and taken to their city as a slave worker.
The Doctor and Harry head to the Kaled city to alert the authorities to Davros' plans while Sarah and Sevrin are forced to work on the completion of the Thals' rocket.
The Doctor fails to prevent the Thals from destroying the Kaled city but they don't have long to enjoy their victory before the Daleks attack.
The Doctor is forced to give Davros full details of future Dalek victories but opposition to Davros' plans is growing among the Kaleds and soon there is open rebellion.
Gharman tries to convince the Kaleds to vote against the Dalek project but Davros has a trick up his sleeve, while the Doctor works to destroy the tape recording of Dalek victory and the Thals plan an intervention of their own.
The Doctor, Sarah and Harry use the Time Ring to return to the Nerva Beacon, however they arrive thousands of years earlier than they anticipated and discover that an old foe of the Doctor is targeting the station's crew.
The Doctor transmits Sarah and Harry down to Voga to cure Sarah of the Cybermat's poison but Kellman's sabotage means he is unable to bring them back.
The Cybermen force the Doctor, Stevenson and Lester to carry bombs to the centre of Voga while Sarah, Harry and Tyrum decide to contact Vorus.
The Doctor, Harry and Lester try to destroy the Cybermen's relay device, while the Vogans prepare to destroy Nerva even though Sarah is still on board.
The Doctor, Sarah and Harry return to Earth in response to an emergency space-time telegraph from the Brigadier, who asks them to investigate the destruction of a series of North Sea oil rigs.
The Zygon traps the Doctor and Sarah in a decompression chamber while Harry is taken to the aliens' underwater ship.
The Doctor and the Brigadier begin to realise who the Zygon imposters among them are while Sarah discovers a secret tunnel to the underwater ship.
UNIT attempt to track down the Zygon ship while Broton prepares to have the Skarasen attack London.
The Doctor and Sarah answer a distress call and find themselves on Zeta Minor, the last planet of the known universe, where a Morestran expedition has gone missing.
The Doctor realises that Zeta Minor lies on the boundary between the universes of matter and anti-matter and something on the planet won't let the Morestrans leave.
The Doctor makes a deal with the Anti-Matter Beast to return all the anti-matter to the planet but Sorenson is determined to continue his research.
The Doctor tries to convince Sorenson to sacrifice himself for the rest of the crew but Salamar's attempt to deal with the situation causes their problem to multiply.
The Doctor and Sarah are drawn off course and, instead of UNIT HQ, they arrive on the same site in 1911.
The Doctor, Sarah and Laurence try to find a way to sever Sutekh's link to the mummies while poacher Ernie Clements finds the priory surrounded by a forcefield.
The Doctor and Sarah try to destroy Sutekh's rocket but the Osiran's mental powers prove too great for them.
Sutekh forces the Doctor to transport Scarman and a mummy to Mars, where the Doctor and Sarah try to stop them destroying the Eye of Horus.
The Doctor and Sarah return to Earth in the present day to find a strangely deserted village and woods stalked by white-clad figures.
The Doctor suspects Crayford brought something to Earth in his rocket, as he and Sarah find themselves hunted by UNIT.
The Doctor is captured by Styggron and left to die in the destruction of the fake village but Sarah escapes from the disorientation chamber to try and rescue him.
The Doctor and Sarah reach Earth and try to warn the research centre about the Kraal invasion before Styggron unleashes his virus.
The Tardis lands in a spaceship graveyard on the bleak planet Karn, where The Doctor and Sarah find a evil scientist called Doctor Solon is constructing a new body for the brain of an evil Time Lord known as Morbius, who The Doctor thought was executed by the High Council on Gallifrey. Morbius plots to rule the galaxy with his new body.
The Sisterhood prepare to sacrifice the Doctor to the Sacred Flame and Sarah is injured while rescuing him.
The Doctor attempts to restore the Sacred Flame to prove his good intentions to the Sisterhood, while Solon prepares to connect the brain of Morbius to his body.
Morbius goes on the rampage, forcing the Doctor and Solon to team up to try and bring him back under control.
Members of the World Ecology Bureau discover a centuries-old seed pod buried deep in Antarctica's permafrost. It seems to be still alive, growing without soil. They transmit a photo to London where Richard Dunbar of the W.E.B. shares it with the Doctor. Wary of what it might be, the Doctor immediately flies down with Sarah. They don't know that Dunbar is a leak in the bureau and has tipped off the discovery to a rich plant fanatic named Harrison Chase. Chase sends a thug and a plant expert down to verify the discovery and fetch it back by any means possible. But before anyone arrives, the pod hatches and the tendril-like life form within attaches itself to one of the men, turning him green. It's as The Doctor feared: they're dealing with a Krynoid.
With a killer Krynoid on the loose, the Doctor, Sarah and the last surviving member of the expedition concentrate on hunting it down, unmindful of Chase's men who, once they learn of the second Krynoid pod (which always travel through space in pairs), work to obtain it and eliminate all possible witnesses.
Surviving two attempts to end their lives, the Doctor and Sarah seek the identity of the plant fanatic who ordered the hit on the arctic base, pursuing their only lead - a commissioned painting of a rare flower left in the boot of a car. Chase, meanwhile, is doing all he can to encourage the hatching of the Krynoid pod.
Sarah is saved from a Krynoid fate and runs off, but the same can't be said for one of Chase's men. Not only is he simultaneously devoured and transformed, his fascinated employer will do all he can to encourage the process. The Doctor gets introduced to Chase's grinder and compost acceleration chamber, which promises him a painful yet swift death en route to making him one with nature, via the garden's nutrient pump. The situation has finally gone too far for Dunbar, who outs his own involvement in this matter and stands up to Chase, only to come face to face with a fully developed Krynoid.
In the interest in self-preservation, Chase's men side with The Doctor against the Krynoid, but the Krynoid - now bigger than the Chase Mansion - invites The Doctor to join it, promising to leave the others alone if he does. People within a mile of the Chase Estate, however, start getting strangled by their plants, while Chase, snapping photos of the Krynoid, has a significant one-on-one encounter with it.
Chase is obviously under Krynoid control. The Doctor suspects possession but, with the mountainous Krynoid nearing maturity and whacking the mansion to pieces, he concerns himself with the bigger picture and orders the mansion - with Sarah and him still inside - to be bombed.
The Doctor and Sarah are drawn into the Mandragora Helix, an entity which exists among the stars and which transports the TARDIS to 15th century Italy.
The Doctor rushes to rescue Sarah from the Brethren of Demnos while Mandragora tries to bring them under its control.
The Doctor saves Giuliano from Federico's men, then they try to find Sarah, unaware Hieronymous has hypnotised her to kill the Doctor.
With Mandragora having taken complete control of the brethren, the Doctor tries to find a way to drain off the Mandragora energy on Earth before it wipes out the guests at Giuliano's masque.
The Doctor and Sarah arrive in a quarry during blasting operations and when Sarah is buried under rubble, she discovers a stone hand.
The Doctor and Carter attempt to gain the trust of the Nunton staff before Sarah takes the hand into the reactor.
Eldrad uses the energy from the reactor to regenerate herself and tries to force the Doctor and Sarah to take her back to Kastria.
The Doctor and Sarah attempt to get Eldrad to the regeneration chamber but Rokon has left traps in their path.
A mysterious evil is at work on Gallifrey. The President of the Time Lords has been assassinated and the Doctor caught red-handed. An inexorable master plan has been set in motion. There can be no escape
The Doctor is arrested for the President's murder and struggles to avoid his immediate execution.
The Doctor battles the assassin inside the matrix dreamscape, while the Master tries to bring about his death in the real world.
The Doctor realises the Master is planning to tap into the Time Lords' power source to extend his own life, an act that will destroy all Gallifrey.
Travelling alone, the Doctor lands on a nameless planet in the far future where he meets a warrior woman named Leela, recently banished from her tribe, the Sevateem who recognise the Doctor as the "Evil One" and wish to destroy him.
Despite protestations against being the Evil One, mounting evidence points to the Doctor's prior involvement with Leela's people, and an error in judgment he once made in their distant past that puts them all in immediate jeopardy.
Venturing into the mouth of the giant statue, the Doctor and Leela meet the Sevateem's rivals, the Tesh. The Tesh greet the Doctor as a lord but his attempt to save Leela's life causes them to view him as an enemy.
As the Saveteem and Tesh finally close in for a fight to the death, the powerful but long-suffering Xoanon ignores their strife to commit its full resources toward killing the Doctor, even to the extent of destroying everyone.
The Tardis materializes aboard a mining ship on a desert planet, inhabited by a human crew and their robot servants. While Leela adjusts to life travelling with the Doctor, one of the ship's robots mysteriously kills a member of the crew.
As the strangulations continue and the humans aren't sure who to blame, Leela meets up with an anomaly among the robot crew - an inquisitive, supposedly mute single-function labor robot capable of independent reasoning. Meanwhile the Doctor starts looking into the possibility that the murderer is a robot, and another crew member is targeted for death.
Hearing about a man who grew up only around robots and who has threatened to start a robot revolution, and who may be aboard the sandminer under an assumed name, the Doctor takes D.84 to seek out a possible secret workshop where he would be restructuring robot programming. Meanwhile, as one crew member suffers a complete mental breakdown, reprogrammed robots are ordered to kill all remaining humans.
With secrecy no longer necessary for the robot revolution, Controller Taren Capel shuts down all friendly robots and gives the remaining humans an ultimatum, or else their deaths will be slow and painful. With no conventional weaponry aboard their commercial vessel, the humans do what they can to resist while giving the Doctor time to work out a permanent solution.
The Doctor and Leela land in Victorian London, and find themselves in the middle of missing girls, mutilated bodies, and vicious Chinese gangs. The Palace theater, presenting hypnotist Li H'sen Chang seems to be at the center of it all.
After escaping from the vicious giant rat in the sewers, the Doctor & Leela team up with Litefoot. Chang, Mr Sin and Weng-Chiang go in search of the time cabinet, while the Doctor and Jago go in search of Chiang's lair.
Leela follows Chang in order to find Greel's hideout while the Doctor and Litefoot set about finding her.
Having rescued Leela from the jaws of the giant vicious rat, she & the Doctor dress up and attend Chang's show at the palace, but end up as part of the act. At home, Litefoot tries to protect the time cabinet.
Weng-Chiang has stolen the time cabinet from Litefoot's house, so the Doctor and Leela go to try and stop him from using it. They find an opium-drugged Chang. Jago teams up with Litefoot for their own investigation.
The real face of Weng-Chiang is revealed as the Doctor, Leela, Jago and Litefoot face their final battle against both Magnus Greel and a trigger-happy Mr Sin.
The TARDIS lands near an isolated rocky island lighthouse just after a comet strikes the nearby sea and a sudden chilling fog rolls in. Soon after, electrical problems take hold of the generator and one of the keepers dies mysteriously.
With inexplicable electrical problems keeping the lighthouse from maintaining a steady beam, a foolhardy ship crashes against the island rocks. Four shaken and discontent survivors join the people inside where the Doctor surmises they're all being carefully scrutinized, a prelude to an attack.
A death scream is heard, yet all are accounted for. Eventually the Doctor finds a body stashed away but hours old, with rigor mortis already settling in, which means there's a chameleon in their midst. Completely cut off from the rest of the world and with an escalating body count, the Doctor wonders just what, exactly, he's locked inside the lighthouse with them all.
With little to fear, and its mother ship about to land and turn Earth into an alien attack base, the electrically charged Rutan scout drops its human guise and attacks openly.
In the year 5000 AD a three-man crew arrive on the planet Titan but unknowingly become hosts for an alien virus that turns them hostile. Picking up a distress signal in the Tardis, the Doctor and Leela head to the planet to investigate.
The Doctor draws into himself, fighting the voice in his own head that's trying to take over his intelligence.
The medical center mounts a defense against alien forces trying to take the comatose Doctor while clones of Leela and the Doctor go microscopic so they can hunt down the intelligent infection that's in his head.
In trying to retrieve the clones from inside the Doctor, the alien virus is brought from the microbial world into the macro-world, and it's ready to spawn.
Archeologists near a reputedly haunted woods use a time scanner to explore the history of a sinister 12 million year old skull, creating a hole in time that attracts the Doctor's attention.
Every time the archaeologists explore the ancient skull, something deadly hunts and haunts the wood while one of the researchers is particularly affected.
The Doctor endeavors to prevent the re-existence of a Fendahl, a group entity that feeds on life itself and thought only to exist in Time Lord mythology, but a witches' coven, seeking power, intervenes.
With one of the archaeologists transformed and a massive implosion threatening, the Fendahl and its Fendahleen components start coming into existence while the Doctor, Leela and the Tylers do what they can to stop it.
The Doctor and Leela land on Pluto in the far future and discover that it's inhabited by humans. Leaving K9 in the Tardis, the pair meet a man contemplating suicide after he's unable to pay his father's "death tax".
Captured by the authorities, the Doctor finds himself restrained in a Correction Centre where he's to be prepped for painful shock treatments, making him unable to return within a given time frame to the underground rebels holding Leela, who are prepared to kill her as promised.
The merciless Collector, who runs The Company, issues a bounty on the Doctor for his capture, while an already captured Leela is sentenced to public execution, via a steamer, for crimes against the company.
Attempting to start a successful revolution, the Doctor uses Pluto's Public Address System to announce successful revolution, all the while trying to determine the Collector's true species and why he, or it, seems set on taxing the life out of humans.
Materializing at the edge of the cosmos, the frontier of creation, The Doctor, Leela & K-9 encounter four ancient space travelers from Minyos, the first race ever contacted by the Time Lords. All but extinct due to their Time Lords encounter, the Minyans (rejuvenated 1000 times each) have been embarked on a long 100,000 year old quest, searching the universe for the lost race bank of their species to take to a new home world. But their equally old ship is finally failing, succumbing to the gravitational pull of a newly forming sun and taking the Doctor and his party with it.
Crashing inside a newly formed planet, the Doctor and others find it inhabited by a slave labor mining society, where rocks are harvested for their radioactive energy and human life has little value. With a population controlled by deliberate cave-ins, poison gas, and periodic sacrifices to an Oracle, the miners, called Trogs, are also descendants from Minyos, and who desperately desire freedom.
Capturing the Doctor and Leela, the citadel guards are quite pleased to have more subjects for their public executions, but it only fires up a Trog revolt instead.
With the Trog revolt close to success, the Oracle grants the Minyos travelers what they seek (the long lost race bank) in hopes they'll depart peacefully and straight away, but the Doctor suspects it's not all going to be as amicable as that. And what to do about the Trogs?
After signing a contract in secret, the Doctor returns to Gallifrey with Leela and K9 in order to claim his title as the President of the High Council of the Time Lords.
The Doctor orders Leela exiled from the Capitol, then orders K9 to sabotage Gallifrey's defences.
The Doctor allows the Vardans to occupy Gallifrey while Leela and Rodan head out into the wasteland to search for help.
The Doctor convinces Andred to trust him as he works to expel the Vardans, while Leela gathers the Outsiders for an attack on the Capitol.
The Doctor and his friends flee from the Sontarans and the Doctor tries to convince Borusa to abandon his sacred office in order to help defeat them.
The Doctor and his friends take refuge in the TARDIS but find themselves pursued by Stor and Kelner.
The Doctor is contacted by the White Guardian who tasks him with finding the six segments of the Key to Time. Joined by a young Time Lady named Romana, he begins his quest on the planet Ribos.
The Doctor and Romana investigate Garron's activities but this results in the Graff believing they are working together.
The Graff takes the Doctor, Romana and Garron prisoner and then sets about trying to track down Unstoffe and the jethryk.
The Doctor returns to the city to keep an eye on the Graff, leaving Romana, K9 and Garron to search for Unstoffe and the first segment.However, Garron double crosses them and steals the tracer.
In seeking the second segment of the Key to Time, the TARDIS heads for an icy world but lands on a populated planet that shouldn't be there.
The Doctor and Kimus head to the Bridge to try and rescue Romana, leaving K9 and Mula to search for Pralix.
The Mentiads take the Doctor, Romana and Kimus to a reunion with K9 and Mula, where they set about trying to defeat the Captain's plans.
The Doctor reveals the truth about the real power on Zanak and must try and stop the Captain and Xanxia before Earth becomes their next victim.
The Doctor and Romana's search for the third piece of the Key to Time leads them to a stone circle in Cornwall where they find signs of strange activity and meet the inquisitive Professor Rumford who tells them of a nearby sect of druids.
Rumford arrives just in time to save the Doctor from being sacrificed, allowing him and K9 to rescue Romana from the cliff face but he is confused when she claims that she was pushed by someone who looked just like him.
Assisted by Prof. Rumford and K-9, the Doctor builds a projector by which to enter hyperspace and rescue the kidnapped Romana, all of them all the while trying to avoid the bloodsucking Ogri stalking them.
Aboard a hyperspace prison ship, two justice machines called the Megara, known for swift verdicts and harsh punishments, arrest the Doctor for breaking an infraction, with trial and execution to be carried out immediately.
The Tardis materializes on the Earth-like planet of Tara. The Doctor goes fishing while Romana finds the fourth segment of the Key to Time but the powerful Count Grendel mistakes her for an android and brings her to his castle.
After Count Grendel kidnaps the real Prince Reynart, the Doctor suggests his android lookalike be crowned king in his absence. Back at the Count's castle, Romana is introduced to Princess Strella who looks exactly like her.
While the Doctor works on the android Prince Reynart's speech circuits, Count Grendel realizes that Romana is a friend of the Doctor and plans to lure him into a trap using an android with her face.
In a last attempt to take the throne, Count Grendel plans to have Romana wed to Reynart with the intent to kill him afterwards and take his place as her husband. When the Doctor arrives to foil his plan, the Count challenges him to a duel.
The Doctor and Romana land on the moon Delta III, home to the green-skinned Swampies and a small group of human colonists. Soon after arriving, Romana is taken by the Swampies who wish to sacrifice her to the mysterious squid-like Kroll.
The Doctor rescues Romana from the Swampies but is horrified to hear that Kroll has awoken.
The Doctor, Romana and Rohm-Dutt are sentenced to death by the Swampies while the refinery crew try to work out a way to destroy Kroll.
The Doctor races to stop Thawn from destroying the Swampie settlement and then works to destroy Kroll once and for all.
The Doctor and company drop in on the planet Atrios, whose inhabitants are in an interplanetary war with their twin planet Zeos. Although Astra, Princess of Atrios, wishes for peace, the Marshal, her commander of the military, does not share her views. So, while the TARDIS is in orbit around the planet, the Marshal targets the Doctor for destruction.
Unable to escape with the Tardis missing, the Doctor, Romana and Merak return to the Marshal who has an unusual change of heart and asks the Doctor for help but it soon becomes clear that someone or something else is controlling him.
The Shadow kidnaps the Doctor and tries to secure the Key to Time, while the Marshal prepares for an all-out assault against Zeos. Meanwhile, the Doctor's companions try to locate the missing TARDIS.
The Doctor sends Shapp and Merak back to Atrios to try and halt the Marshal's attack, while he and Romana attempt to disable Mentalis.
With both K9 and Princess Astra under his control, the Shadow lures the Doctor and Romana to his planet where the Doctor reunites with his old Time Lord friend Drax.
Romana looks on as Princess Astra turns herself into the sixth segment of the Key to Time, giving the Shadow ultimate power. The Doctor and Drax arrive just in time but for the Doctor one final trial remains.
The Doctor and Romana find themselves on Skaro and forced to be military advisers to the Daleks' enemy, Movellans, while the Daleks revive Davros.
While the Daleks assign Romana to their excavation detail, the Doctor and an escaped prisoner help the Movellans' attempt to beat the Daleks.
The Doctor reaches Davros first, but can he hang on to him? Meanwhile, the Movellans test a bomb to incinerate the planet.
To break the centuries-old stalemate in their war, the Movellans need the Doctor, as do the Daleks Davros. The solution is simple, but neither side can see it, nor would the Doctor upset this perfect and unplanned peace they've achieved. Davros, though, is another matter.
While sightseeing in Paris, the Doctor and Romana find themselves repeatedly reliving the same moments in time. A visit to the Louvre Museum leads the Doctor to suspect an alien plot to steal the Mona Lisa.
Count Scarlioni has the Doctor, Romana and Duggan locked in his basement but the trio manage to escape and learn of the Count's experiments with time travel. Even more surprising are his multiple genuine copies of the Mona Lisa.
Travelling back in time to 1505 Florence in search of Leonardo da Vinci, the Doctor is surprised to instead find Count Scarlioni under a different name. Back in 1979, Romana and Duggan attempt to stop the Count's heist but arrive too late.
Count Scarlioni reveals his true form as Scaroth, the last of the Jagaroth and uses his time machine to go back in time and rewrite history. The Doctor, Romana and Duggan take to the Tardis in a race against time to stop him.
The Tardis lands on the overgrown jungle planet of Chloris where the Doctor examines an unusual giant eggshell but soon he and Romana are taken prisoner by the guards of Lady Adrasta, the planet's cruel ruler.
Descending into the pit, the Doctor meets the banished astrologer Organon who tells him of Lady Adrasta's monopoly over the planet's supply of metal. Back on the surface, Romana tries to prevent Adrasta from destroying K9.
Trapped face to featureless face with the alien creature, the Doctor tries his best to communicate with it. Meanwhile, as Adrasta's group tries to break through metallic bio-blockage created by the creature, bandits raid her palace for every scrap of metal they can find, including an alien shield that harbors powers no one suspects.
Full revelation of Adrasta's wicked acts in maintaining her planetary monopoly on metal brings her reign to an end, but the victimized alien creature holds a secret: massive interstellar retribution for her crimes is headed their way, with doom for all, including those whose current short-sighted actions undermine the Doctor's efforts to save the planet in order to become new leaders of the old metal monopoly.
The Starliner Empress comes out of warp and collides with a scientific survey ship, the Hecate. The Doctor and Romana arrive offering to help separate the two ships but all is not as it seems.
The unstable interphase of the two ships opens up unexpected passageways for dangerous monsters caged in an electronic zoo aboard the cruise ship to escape. Meanwhile, as an attempt is made to hook Romana on vraxoin, the Doctor discovers a mystery man aboard ship to whom he gives chase.
Hiding out from arresting authorities in the electronic zoo's inhospitable Eden exhibit, the Doctor and Romana discover a man reported dead. Meanwhile, the monsters, called mandrels, start attacking and killing passengers, much to the amusement of the ship's captain.
After succeeding in separating the two merged ships, the Doctor discovers the identities of the drug runners. He, Romana and K-9 endeavor to catch them cleverly while also avoiding both the excise men wanting to shoot them and the marauding mandrels just wanting to kill anyone in sight.
After colliding with a spaceship, The Doctor, Romana and K-9 learn young natives from a peaceful planet called Aneth are being transported into a great labyrinth called "The Power Complex" where the evil bull-like Nimon demands that all his victims who enter The Power Complex are sacrificed so The Nimon can return to the Skonnan Empire back to glory. When Romana is taken captive and also chosen for sacrifice, The Doctor and K-9 travel to the heart of the maze as they set out to rescue Romana and foil The Nimon's evil plan to enslave the universe.
The Doctor and K-9 struggle to repair the Tardis and rescue Romana from Skonnos where she is accused of space piracy.
Discovering the Nimon power room puts the Doctor onto the immense threat facing the universe, all enabled by Soldeed's crazed plan to return his war-mongering people to military glory.
While the Doctor endeavors to amend putting Romana in great peril, she experiences a foretaste of Skonnos's fate on the ravaged planet Crinoth, and a shocked but undeterred Soldeed gets a glimmer of how he's been used by the Nimon.
Finding out-of-season Brighton beach somewhat lacking, the Doctor and Romana travel to the leisure planet Argolis - but there strange experiments are taking place.
Another man is found dead, strangled by the Doctor's scarf, so the Doctor is put on trial. By some of the archaic rules of law, he's made to "prove" his innocence by becoming a test subject in a new tachyon experiment with time. The result will prove his innocence or guilt, so they say.
With the Doctor suffering from the time experiment, the clandestine schemes of others start coming to light, along with the secreted purposes to which the tachyonic generator has been used.
With the saboteur and murderer revealed and arrested, peace should now be restored, but a new threat emerges - a war-monger who's both ready and eager to aggress upon other worlds with a newly manufactured warrior army.
The Doctor, Romana and K-9 arrive on the forest planet Tygella, where the native Tygellans now live in a underground city, due to the carnivorous plants. Where the Doctor finds he has been wrongly accused of stealing the Dodechedron, the city's power source. Only to discover the culprit is Meglos, the cactus-like last survivor of the desert planet Zolfa-Thura and he bids to return the Dodechedron to Zolfa-Thura for his own evil purpose and plans to use it as a powerful weapon and he plans to wipe out Tigella.
With the TARDIS occupants trapped in a chronic histeratic loop (forever reliving the same moment in time), the devious Meglos - disguised as the Doctor - gains the trust of the Tigellans along with full and private access to their power chamber.
With the dodecahedron gone, the city goes power critical. Its death, imminent. With Romana seeking escape from Meglos' pirates, and Meglos seeking escape from the sealed-up city, and the Doctor himself seeking to understand what's been going on (and why everybody wants him arrested), religious factions move in to take over the city.
With the Doctor about to be ritualistically sacrificed to appease the god Ti for stealing the dodecahedron, Meglos and the pirates return to Zolfa-Thura with the dodecahedron to fire up an ancient weapon and blast Tigella out of existence.
After receiving a summons from the Time Lords, the Doctor and Romana set course for Gallifrey, however the pair instead land on Alzarius where they cross paths with a rebellious but mathematically gifted boy named Adric.
The Doctor and K9 watch as Marshmen begin emerging from the water, while K9 follows them, the Doctor ventures on board the Starliner. Meanwhile Adric's gang attempt to hijack the Tardis with Romana on board.
The Tardis materializes on board the Starliner, reuniting Login with his daughter and allowing the Doctor and Adric to return to the cave to save Romana who is behaving strangely after being bitten by a spider.
As the Marshmen begin pouring into the Starliner thanks to an infected Romana, the Doctor and Adric hurry to create an antidote but in doing so discover a deep secret about the Marshmen and their connection to Adric's people.
The Doctor and Romana find an isolated planet. K9 scans the planet, finding it has a village. The Doctor and Romana find high technology readings with the TARDIS sensors even though the village appears to have an absence of technology. The TARDIS lands near the village. The Doctor and Romana set off, leaving K9 behind to guard the TARDIS. Adric, from the previous story, has stowed away on the TARDIS. K9 finds him, but Adric tells him that as he is a stowaway. The Doctor and Romana find two men arguing. The Doctor asks to speak to a scientist. One of the men mistakes them for lords. After the Doctor, Romana and one of the men leave, The other man, using a radio, calls to others and tells them of the two strangers who just arrived. Travelling through the forest, Romana and the Doctor are surrounded by men. They surrender and are taken to a hidden cave, where they meet the rebels. One man is trying to get a computer up and running. The Doctor helps him and Romana identifies the computer system as coming from Earth, Adric tries to steal some food in the village. Adric is caught and those who caught him take on pity him and offer him a place to sleep because of the evil things that happen at night. The Doctor and Romana appear to be attacked by a swarm of bats at the end.
The Doctor and Romana are taken to the tower where they meet The Lords and come to the realization that the tower is actually a disused spaceship. A Lord named Aukon arrives at the village and takes Adric with him back to the tower.
Tarak arrives to free the Doctor and Romana from their imprisonment. Believing The Lords to be vampires from Gallifreyan legend, the Doctor returns to the Tardis to consult the Record of Rassilon while Tarak and Romana search for Adric.
The Lords prepare to sacrifice Romana and induct Adric into their ranks as part of their plan to awaken the "Great One" and escape E-Space. Meanwhile the Doctor and K9 assist Kalmar's men in attacking the tower.
While the Doctor and Romana desperately rack their brains over how to escape E-Space, Time Winds strike the TARDIS, damaging it and K-9. Strangest of all, it allows Biroc, a hurt and hunted lion-man, to enter, phased in time, and set the control coordinates at zero-zero, sending the TARDIS into a milk-white void. Before running off, he warns of others who will be soon following.
Three humorless men from a damaged bulk freighter find the TARDIS. Wearily, Romana returns with them to appraise the situation of their damaged ship but, because she's a time sensitive, winds up as a living navigational component to replace their time-sensitive Tharil (lion-man) who escaped. Meanwhile the Doctor, having found a gateway, is having a time with Gundans, robot soldiers programmed to kill.
While Biroc leads the Doctor to a view of the Tharil's lordly past, Romana learns more about the damaged freighter and the coldheartedness of its crew. Meanwhile Commander Rorvik, confounded by the time mirror inside the universal center gateway, ignores evidence that it's no simple mirror and decides to blast it, imperiling the lives of everyone.
After the Doctor and Romana save the Tharil race, Romana agrees to leave the Doctor to become the Tharils' "Queen of Time."
The Tardis is drawn towards Traken, a harmonious planet. The Keeper of Traken appears inside the Tardis to warn the Doctor and Adric of his nearing death and of an evil being known as Melkur that threatens Traken's peaceful ways.
Tremas claims counselor privilege to protect the Doctor and Adric from execution, though it binds his fate to theirs if they're found guilty of murder. Melkur strengthens his hold over Kassia while Seron decides to have rapport with The Keeper to learn truth, and Adric finds evidence of another TARDIS in the area.
With Tremas falling under suspicion, due to his association with the Doctor, a new Keeper Nominate is named. Now, with everything in place, Melkur has only a short wait before his full malevolence can unfold.
With the merciless Melkur in control of The Source, the Doctor and his allies have only a slim chance of deposing him, which also puts the peace of the Traken Union in severe jeopardy.
Preparing to overhaul his TARDIS, the Doctor goes to Earth to take fresh measurements of a police box. A figure in white observes, as the Master lies in wait with a puzzling predicament for his rival Time Lord.
Figuring out that the Master has taken over Tremas's body, the Doctor and Adric land the Tardis near the River Thames before heading to Logopolis. Meanwhile a confused Tegan wanders the halls of the Tardis looking for help.
Adric, Nyssa and Tegan aid the Monitor in saving the Doctor after he is trapped inside his shrunken Tardis. The Master, posing as Nyssa's father Tremas, makes his presence known on Logopolis as his plan nears it's completion.
Forced to work together to save the universe from collapsing, the Doctor, the Master and Tegan use the Master's Tardis to travel to a giant satellite dish on Earth. Meanwhile Adric and Nyssa are taken to safety by the mysterious Watcher.
The Doctor has regenerated but it hasn't gone well. He's mentally unraveling and needs a place to rest beyond outside influences. Unfortunately the Master has laid a trap for the TARDIS that denies the Doctor undisturbed recovery time.
To avoid falling into Event One (the Big Bang), the Doctor must convert mass into momentum by having the TARDIS jettison a quarter of itself. Unfortunately it can not be known which rooms will be ejected.
The city of Castrovalva and its untroubled people would seen an ideal place for the Doctor to recover, but a dire warning from Adric, held captive by The Master, makes it seen less so.
The Portreeve of Castrovalva is revealed to be the Master in disguise who, as the Doctor discovers, created Castrovalva himself to trap his newly regenerated arch-enemy.
Instead of Heathrow Airport, the Tardis lands aboard a spaceship. The Doctor and his companions meet it's inhabitants, three Urbankans, and more surprisingly a group of humans of different nationalities and from different time periods.
Intrigued by the ancient humans on board the Urbankan ship, the Doctor and his companions decide to explore further. The Doctor and Tegan, separated from Adric and Nyssa, learn from Bigon the truth about the cultural representatives.
Monarch wins Adric over with his plan for humanity but Nyssa isn't so easily swayed. Meanwhile, Bigon reveals to The Doctor the nature of Monarch and the ship's android inhabitants while a panicked Tegan attempts to escape in the TARDIS.
The Doctor needs to stop Adric from siding with Monarch and get Bigon quietly restored (who was mechanically lobotomized for previously siding with the Doctor). The ship then gets turned into one big multi-cultural dance party so the Doctor can make a desperate leap for the TARDIS, floating just outside the spaceship, and stop Monarch's plans for Earth.
The Tardis lands on Deva Loka. While Nyssa recovers inside the Tardis, the Doctor and Adric meet a survey team and their hostages, the seemingly primitive and mute Kinda. Meanwhile Tegan is tormented by an evil entity in her dreams.
While Sanders leaves the dome and receives a strange box from two female Kinda, Hindle begins losing his mind and has the Doctor, Adric and Todd arrested. Meanwhile the Mara takes over Tegan's body.
Opening the box, the Doctor and Todd learn the truth of the Kinda and escape from Hindle to find the Kinda's wise woman Panna. Meanwhile the Mara, posing as one of their own, tries to bring the Kinda under it's control.
Led by the voice of the Mara inside Aris, the Kinda begin their attack on the dome. The Doctor, Todd, and an awakened Tegan attempt to stop the two sides destroying each other and hatch a plan to defeat the snake-like Mara.
Trying once more to return Tegan to Heathrow Airport, the Doctor instead lands the Tardis in the same location three hundred years earlier where he and his companions are chased by angry villagers but rescued by a charismatic highwayman.
To rescue Tegan and Adric, captured and interrogated by the Terileptil fugitive leader, the Doctor must get past the locals under alien control and overcome Death (an android servant dressed up as The Grim Reaper).
The Doctor makes the fugitive Terileptils a rare offer they shouldn't refuse; but, though few in numbers, they have a plan in the works for the quick and complete domination of Earth and mean to see it through.
With Tegan and Richard under alien control, and the manor sealed against anyone leaving or entering, it's a question whether or not the Doctor can get to London before the Terileptils release their improved strain of black death upon the world.
The TARDIS arrives in England, 1925, near to where a mysterious, gurgling man has escaped his bonds and started strangling servants. The Doctor is "expected" and taken (along with Tegan, Nyssa, and Adric) to the Cranleighs' country estate where The Doctor participates in a cricket match and Nyssa turns out to be the near spitting image of Ann, fiancée of Charles Cranleigh. They all stay for an afternoon costume ball. Tegan teaches others how to do the Charleston while Adric eats, but The Doctor finds himself searching through secret passageways in his bathrobe after the gurgling man steals his clothing and party costume to attend the ball and deal with one of the guests.
Ann escapes her Harlequin-clad abductor but it's The Doctor whom she accuses. Strangled bodies mount and The Doctor is arrested along with "accessories" Tegan, Nyssa and Adric. Will Lady Cranleigh's secret come out?
In the midst of an argument between Adric and the Doctor, the Tardis materializes underground in Earth's distant future where a team of paleontologists and geologists find themselves under attack from a pair of androids.
Disposing of the androids, the Doctor and Adric must deactivate a bomb that they unknowingly triggered. Setting off in the Tardis to find the culprits, they arrive aboard a freighter ship while the Cybermen watch their old enemy from afar.
Aboard the freighter, the Doctor and Adric are taken prisoner by Captain Briggs. The Doctor looks on in fear as his old foe, the Cybermen, begin to take over the ship in large numbers.
Tegan is captured by the Cybermen, allowing the Cyber Leader to use her as a hostage and force the Doctor to do his bidding. Left behind on the ship, Adric attempts to prevent it from plummeting to Earth as time is running out.
Following the death of Adric, the Doctor arranges a trip to Victorian London to lift everyone's spirits but the Tardis instead materializes at Heathrow Airport where a British Airways Concord has mysteriously vanished.
The Doctor's TARDIS is stolen, and tracking it down reveals the existence of an alien named Kalid controlling events in the past. While the Doctor challenges Kalid's motives for being there, Tegan and Nyssa discover the source of Kalid's power - an even greater threat for the Doctor.
The Master commandeers the Doctor's TARDIS, leaving the stranded Time Lord time to work out the mystery of the alien sanctum he's been trying to enter. Inside lies an immense power - the entire Xeraphin race, thought long lost but distilled into a single living essence, ready for rebirth but now suffering a dual gestalt personality, good versus bad, thanks to the Master's meddling with it. As the two Xeraphin halves enter into a struggle for dominance of the whole, the Doctor works for a favorable outcome before the Master can succeed at turning them into his new power source.
Incorporating the Xeraphin race into his TARDIS power system, the Master has won, but technical obstacles and a bit of sabotage from friendlies give the Doctor a bargaining chip for the lives of the hijacked and enslaved airline passengers and crews - with maybe, just maybe, some hope for the Xeraphin race as well.
On Gallifrey, someone on the high council is perpetrating a treasonous act - transmitting the Doctor's bio-extract from the space/time matrix to an anti-matter being. On Earth, two English lads spend their last night in Amsterdam sleeping in a crypt where they're attacked by an alien creature under the same anti-matter being's control.
The High Council sentence the Doctor to death on Gallifrey, as Nyssa works with Damon to find proof that one of their own had stolen his biodata extract. Meanwhile Tegan arrives in the Netherlands to look for her missing cousin.
Something seemed amiss about the Doctor's execution, so the Castellan has Commander Maxil discreetly but fully look it. Meanwhile, as the Doctor meets the anti-matter being inside the Time Lord Matrix, Tegan and her cousin's friend run afoul of a bird-like alien back on Earth.
The High Council creates a distraction so the Doctor and Nyssa can find Omega on Earth and prevent his reentry into our universe.
The TARDIS lands on Manussa where Tegan once again gets possessed by the Mara, who plan to break into the physical world.
The Doctor talks to Ambril and Chela to try and stop the 500th anniversary celebrations. A possessed Tegan finds herself in Dugdale's Hall of Mirrors to where she summons Lon. The Doctor and Nyssa return to the caves.
The possessed Tegan and Lon try to find the whereabouts of the Great Crystal. The Doctor finds himself in prison, with only Nyssa to try and get him out. Chela tells the Doctor tales of Dojjen.
Escaping from jail and rescued from execution by Tanha, the Doctor escapes to find Dojjen. Will he finally be able to defeat the Mara?
With the TARDIS trapped on a collision course with a strange, orbiting spaceship, locked in time as well as space, the Black Guardian recruits a deceitful and ill-natured British student to kill the Doctor.
In 1983 the Doctor is once again reunited with his old friend Brigadier Lethbridge-Stewart, only the Brigadier struggles to remember his adventures with the Doctor. Meanwhile Tegan also meets the Brigadier in 1977.
While Nyssa, Tegan and the 1977 Brigadier debate whether or not Mawdryn is really the Doctor in a new body, the Doctor and the 1983 Brigadier explore the spaceship as the Black Guardian uses Turlough to awaken the rest of Mawdryn's people.
Mawdryn presents the Doctor with an ultimatum; give up his remaining regenerations or leave the ship and suffer the consequences. Meanwhile Turlough's stupidity puts the two Brigadiers at risk of meeting, angering the Black Guardian.
With the Black Guardian's guidance, Turlough begins sabotaging the Tardis which causes it to latch onto a seemingly empty passenger ship where the Doctor and Nyssa meet two space pirates and find themselves boarding space station Terminus.
The Doctor's party remains divided and scattered as the immense transport docks at the Terminus space station, which turns out to be a leper colony at the exact center of the known universe. As they find their way around and investigate, Nyssa shows signs of contracting the disease.
Since the Doctor's party represents neither lazars nor handlers, they're presumed to be investigators, which is enough to spark the disgruntled Valgard into challenging Eirak over leadership of the handlers. Meanwhile, as the giant, dog-like Garm takes a terrified Nyssa off for "treatment," Bor returns from the forbidden zone with interesting news about the ship.
In attempting to reopen a doorway into the TARDIS, Turlough activates Terminus' automated fuel-jettisoning sequence. The first time this sequence was engaged, it flung its first of two massive loads of unstable fuel into the distant past, producing the Big Bang that created the universe. This second sequence - if the Doctor can't find a way to shut it down - will release a second massive load, the explosion of which will entirely negate the effects of the first.
The Doctor is in a race with the clairvoyant Eternals for the prize. When the Black Guardian appears, though, the Doctor is suddenly in a race for his life!
Captain Striker and his officers reveal themselves to be Eternals, mind-reading creatures who live outside of time and who require Ephemerals (humans and other "time dwellers") to relieve them of their emptiness. They race against other Eternals for the grand prize of Enlightenment, by which to grant their deepest wishes. That can't be good for the universe, but how can the Doctor strategize against beings adept at reading his every thought?
Jumping overboard to escape the Black Guardian, Turlough lands on the Buccaneer, a pirate ship captained by the ruthless Captain Wrack who invites her rival Eternals aboard her ship to eliminate them from the race.
As the race nears it's end and the Black Guardian's victory seems all but certain, his counterpart, the White Guardian offers Turlough one final choice.
The Doctor, Tegan and Turlough arrive at an English castle in the year 1215 where King John welcomes the trio as demons. Noticing the King's strange behavior, the Doctor suspects he is actually an impostor.
With The Master revealed, two questions remain: Who is impersonating King John and why?
The Doctor and his previous incarnations are brought to the Death Zone on his homeworld Gallifrey as part of a renegade Time Lord's scheme.
The Doctor, Tegan and Turlough land inside an undersea secret military base in wartime Earth, 2084. The base is about to be attacked on two fronts. Enemy agents within work to neutralize the base while an assault team of aquatic Silurians prepare without for a surprise attack.
Just are the Doctor gains a tentative trust from the humans, a Silurian battle cruiser approaches. The Doctor warns Commander Vorsha to hold his fire and find out what they want, but is the level-headed commander one who'll listen?
With Silurians and Sea Devils attacking the air locks, the saboteurs use the distraction to launch plans for disabling vital functions of the base. With all the strife going on around him, and an electricity-generating myrka on the loose, the Doctor endeavors to bring a little sunshine into their unhappy undersea lives.
With Silurians in control of the base, Icthar reveals his plan for a final solution to Earth's human problem, which presents the Doctor a great moral dilemma.
The TARDIS arrives in Little Hodcombe. Tegan wants to visit her grandfather, only he's disappeared. There's also a war game going on, and it's getting out of hand.
The Malus, an alien that's purely evil, needs the civil war re-enactments to become authentic so it can feed off the psychic energy of dying and embattled men and fully revive. Not if the Doctor can derail things, of course.
In the far flung future, the TARDIS is forced to crash land on the planet Frontios, where the Doctor finds some of the last surviving human beings cowering from a meteorite bombardment.
Following the destruction of the TARDIS, the only part of it left is the hat stand. So Turlough uses it as a weapon! Plantagenet gets swallowed by the earth, and Norna and Turlough discover the Tractators.
Trying to rescue the Doctor from the Tractator's trap, Tegan finds herself and the Doctor in even more trouble. Turlough goes a bit mad, and reckons he knows the evil of the Tractators from old.
The Doctor tries to deal with the Tractator's cunning plan, despite Turlough's best intervention. They discover the splintered TARDIS in the tunnels beneath the planet's surface, but how will they put it together again?
A time corridor forces the Doctor to the London docklands on present-day Earth where a bomb squad watches over some strange, alien canisters. At the other end, a battle cruiser launches an assault on a prison space station that holds just one prisoner - Davros, creator of the Daleks.
While Davros looks into solving a small problem offered up by the Movellans, the Daleks have not overlooked the Time Lords for all their years of interest and attention paid them, hoping to make of the Doctor and his companions emissaries of their appreciation, in order to thank them all to the fullest and permanently.
The Doctor and Turlough arrive on Lanzarote to investigate a signal. Turlough rescues American Student Peri Brown from nearly drowning and discovers she has in her possession a data core from Turlough's home planet Trion. The Doctor, Turlough and Peri follow the signal to the volcanic planet Sarn, where the natives worship a fire god known as Logar, and where the Doctor learns The Master has accidentally shrunk himself after testing a more lethal version of his tissue compression eliminator and has taken control of Kamelion, using him to find numismaton gas that will restore him to his normal size.
On the volcanic planet Sarn, Turlough recognizes several Trion artifacts that point to Malkon (the Chosen One among the Sarn people) being his own brother. Meanwhile, Peri flees from Kamelion who has almost been entirely possessed by the Master.
Sarn prophesy foretells of an outsider who will come to aid the people. It's a role the Master is more than delighted to fill, which finally presents Timanov, the Sarn religious leader, the unbridled support he's sought in his campaign to cull the faithless from among his people. Turlough's secret past, however, is somehow intricately involved in all this, and the reluctance of its disclosure is enough to threaten all friendly ties with the Doctor.
While the Master, victim of his own attempt to improve his TCE weapon, seeks restoration through Sarn's numismaton gas, the truth of Turlough's past comes out at last, though to guarantee the safety of his brother and the Sarn people, Turlough must consider a great personal sacrifice.
The Doctor and Peri get involved with drug running after landing on the twin planet of Androzani Minor and getting arrested as gun runners and targeted for execution. Not before Peri stumbles into some highly toxic and lethal plant life.
Having been saved from execution by Sharez Jek and his androids, Jek takes a shine to Peri, and wants her with him forever. Salateen tells the Dr and Peri that they are dying from Spectrox toxemia, but there is an antidote.
After escaping the vicious Magma creature, the Doctor is made a prisoner of the gun runners and taken to Androzani Major. The real Salateen takes an ill Peri back to Chellak.
Chellak and his men attack Jek's base. The Dr. crash-lands the ship, and must escape from his captors to find the antidote to the Spectrox poisoning and save Peri. He does so, but at a staggering cost.
The Doctor's moods are wide and in a jumble as he settles into his new regeneration. Elsewhere a set of genius twins are kidnapped, whose mathematical computations can manipulate features of the universe. They're immediately put to work by aliens for an as yet unknown end.
The Doctor takes Peri to Titan 3, a desolate hunk of rock in space where he hopes to find some solitude for awhile. Instead he finds the lone but unconscious survivor of a recent spaceship crash in sight of a mound-shaped complex where no formalized structure should exist.
The Doctor arrives on Jaconda, once lush and green, to find it completely devastated by giant gastropods. Old legends about the planet's half-human/half-slugs weren't just myths after all. With or without help from the Doctor and his unpredictable mood swings, Lt. Lang is up for rescuing the twins, who are finally informed of the grand purpose they've been brought to Jaconda to accomplish.
The Doctor and Edgeworth deduce that the real plan of Mestor, the gastropod ruler of Jaconda, will not only destroy Jaconda but lead to the devastation of other planets. Together they hope to thwart him despite his formidable ability at slipping into people's minds and controlling them.
The Cybermen plan on destroying Earth in order to prevent the destruction of their home world, Mondas. The Doctor also discovers the Cyber Controller is far from dead.
The Doctor is captured by the Cybermen and taken back to their home planet. There he discovers the source of the signal.The Cryons, original inhabitants of the Cybermen's world, survive underground and they want the Cybermen gone. The Doctor learns the full extent of the Cybermen's plans. Not only are the Cryons threatened but so too the very future of the human race. This is no war of conquest, but total destruction.
The TARDIS makes an emergency landing on Varos, a planet that used to be a penal colony, and where the native Varosians are presently entertained by broadcasts of real violence and death. Mistaken for rebels, the Doctor and Peri learn that Sil, an evil delegate of the Galatron mining corporation, bids to rule Varos and to control supplies of Zeiton 7 ore, which is the TARDIS's only fuel source.
The Governor forces the Doctor to tell him the true value of zeiton-7 but Sil attempts to derail his plans by subjecting Peri and Areta to an enforced mutation.
In a 19th century mining village, a renegade Time Lady known as The Rani is draining brain fluid from local men, turning them savage and berserk. It is here The Master plans to coerce her help in his vengeance upon The Doctor while also establishing a power base for controlling Earth's future.
The Master uses The Rani's mind-controlling parasites to keep a meeting of Earth's leading scientists from being canceled, and helps The Rani plant transformation land mines for The Doctor as he continues to propose an alliance with her in ruling over Earth.
The Time Lords have dispatched the Doctor (in his 2nd incarnation) along with Jamie to a space research station to see Dastari, the Director of Projects, about dissuading two of his scientists from further experimentations on time travel that are rattling the fabric of time. The Doctor is further alarmed over Dastari's latest genetic experiments, boosting the intelligence of a bestial and carnivorous humanoid race called the Androgum. This secondary concern soon proves the greater problem: the Androgum have sided with the Sontarans to take over the station. The station soon falls and the Doctor is captured and tortured. As his life becomes threatened, elsewhere the Doctor (in his 6th incarnation) passes out while on holiday with Peri - his very existence jeopardized.
With carnage and decay all about the space station, Doctor No. 6 and Peri continue to avoid the automated defense system trying to kill them, but there's also something alive lurking about with an eye on them as well. Evidence suggests the Time Lords are responsible for all this, but the Doctor refuses to believe it. He may be wrong, and he also fears a pinhole has been poked into the bubble that is the universe, with total and unstoppable annihilation to follow. Far away, Doctor No. 2 is about to be dissected by the Sontarans and the Androgum in order to find the symbiotic nuclei that makes time travel for Time Lords possible.
Closing in on the goal of time travel, the Androgum and Sontarans get set to double-cross each other. With Peri and Jamie alternately in danger of winding up on the bill of fare, the decision is made to genetically transform Doctor No. 2 into an insatiably carnivorous Androgum, which causes Doctor No. 6 to develop a sudden taste for house cats as he races to not let this change become permanent.
A time corridor, called Timelash, has been set up to punish dissidents on the planet Karfel, dumping them alive but permanently into Earth's early history. The TARDIS runs right into it, and the Doctor thereafter finds a society with advanced technology it shouldn't have along with an unnerving absence of reflective surfaces of any kind.
For his impending confrontation with the mysterious and cloistered Borad, dictator of Karfel, the Doctor takes kontrom crystals from the Timelash to build a 10-second time break device, not knowing of the Borad's mutation and breeding plans for Peri or the interplanetary war he's sparked with the Bandrils, who are on their way to destroy all mammalian life on Karfel.
The Doctor and Peri arrive on the planet Necros to attend the funeral of scientist Professor Athur Stengos, only to discover Davros, the creator of the Daleks, has become "The Great Healer" who runs Tranquil Repose, a facility where the terminally ill are kept in suspended animation until a cure is found. They learn Davros has been turning all those in suspended animation into Daleks that are loyal to him while making food from their dead bodies.
The Davros running Tranquil Repose has only been a figurehead - literally just a head, created and animated by Davros himself. Now, the real Davros wheels forth to face the Doctor, but his own immoral dealings have fostered an uneasy surrounding situation, riddled with treachery, that only a few might escape.
The Doctor is put on trial by the Time Lords again. The first of two events from his resent past is presented as evidence of his interference in the affairs of other worlds. In particular, his actions on planet Ravalox.
The Doctor finds that the subterranean UK Habitat is run by a cloistered robot named Drathro, whom the inhabitants call "The Immortal." Their black light energy converters are destabilizing, unaware that it's the result of two space pirates mucking about on the surface with designs on looting their dwelling.
The Doctor escapes to rejoin Peri on the surface but shortly becomes the prisoner of a surface-dwelling tribe called The Free. Ravalox isn't Ravalox after all, but before the Doctor can learn much more an irresistible agent from UK Habitat comes to fetch him back.
All those on Ravolox are in exponentially greater peril than anyone can comprehend. If anything in the entire universe is to survive, it may come down to the Doctor arguing against machine logic over the value of life.
The court looks into the Doctor's investigation of Thoros Beta, home planet of the Mentors whom the Doctor suspects of selling advanced weaponry to primitive cultures.
Having been put through a makeshift truth extractor, the Doctor appears damaged, apt to mimic the personalities of those with whom he has eye contact. He eventually abandons Peri and a gung-ho warrior king in favor of joining in with Sil and Dr. Crozier in the latest of their perverse projects.
While the Doctor helps Dr. Crozier transfer Lord Kiv's brain into a new host skull, Peri accompanies King Yrcanos as he searches for the Alpha Resistance fighters whom he feels, most certainly, will follow him into glorious battle against the Mentors and the Doctor.
The first transfer is flawed, so Dr. Crozier needs to transfer Lord Kiv into another host body. Unfortunately, Peri meets all the requirements for the subsequent candidate. Since the Doctor's been helpful and has somewhat of a personal interest in Peri, he's permitted to locate an equally suitable substitute candidate, if he can. The prosecution rests.
As the trial continues, the Doctor presents an event from his future as evidence of his reform.
A lethal booby-trap in the Hydroponic Center awakens the genetically engineered fruit pods in storage, and passengers and crewmen alike start disappearing without trace. There's a murderer on board and the Doctor means to find out who he or she is.
A course change that takes the Hyperion III closer to a black hole could prove unwise when there are so many aboard ship with hidden agendas. Disappearances continue, a murderer remains at large, and one person finally crumbles under the strain of harboring a guilty secret.
With factions vying for control of the ship, the Vervoids are found to be responsible for the many disappearances. Only the Doctor sees the fundamental but missed point as to why they can't be reasoned with or why they can't be allowed to arrive on Earth.
The charge against the Doctor changes from mere meddling to inexcusable genocide. His future looks both grim and very short.
So much ado by the Valeyard and the Master over the Doctor's death makes the Doctor wary of being made decoy for some other, truer target. Continuing in the Matrix itself, he may find both them and the answers he seeks.
The Rani, needing the Doctor's expertise, shoots down his TARDIS, crash-landing it on planet Lykertya where the Doctor dies and subsequently regenerates. She biochemically induces selective amnesia before disguising herself as Mel in order to angle him deceptively into repairing one of her broken machines. The real Mel? Left behind in the TARDIS, alive but unconscious, where she's found by a grim rebel Lakertyan who then makes off with her.
The Rani's deviousness inadvertently sets the Doctor and Mel against each other - she having yet seen the Doctor in his new regeneration, he believing Mel is the Rani disguised, and each thinking the other is an agent of utmost evil to be brought down. Two unanswered questions linger: Why has the Rani collected geniuses, and why is she messing around with "strange matter."
The solstice nears, making it time for the Rani to bring her plans into fruition. The Doctor's sympathies for Beyus, ruler of the Lykertyans, are rather qualified. Beyus' heart is for his people yet something prompts him to collaborate fully in helping the Rani reach all her objectives. The answer, he's told, lies within the Center of Leisure.
The Rani, at last, links the Doctor into her great brain machine, the crowning jewel in her component packet of geniuses brought together to turn Lakertya itself into one vast cerebral mass capable of redirecting time anywhere in the universe, giving her absolute power over all creation.
The Doctor and Mel visit Paradise Towers, a apartment complex in the 21st century, only to find it rat-infested and ruined. Paradise Towers is inhabited by Rezzies (elderly women, at least some of whom are cannibals), Kangs (roving gangs of teenage girls), Pex (a cowardly young warrior who proclaims himself the local hero) and Caretakers led by a Chief whose job is to keep the apartment complex in order. But the Doctor and Mel find that robotic cleaners are killing off everyone in Paradise Towers, one-by-one. The culprit is Kroagnon, the building's award-winning architect, who plots to rid Paradise Towers of all those who live within it.
The Doctor reunites with the Red Kangs to question why no one questions the steady number of deaths at Paradise Towers. Elsewhere, Mel meets the Blue Kangs who reveal that Pex, the lone young male in the complex (who talks a good game while flanking Mel), is not nearly the heroic and capable fighter he continually boasts of being.
The Doctor discovers that Paradise Towers' great architect, Kroagnon, was also responsible for Miracle City, an infamous killer habitat. Though chance circumstances permit Mel to avoid a dinner date with a couple of grandmotherly cannibals, the Doctor realizes everyone must band together or be destined for the menu of a greater infamy lurking in the basement.
Meeting up at the pool, the Doctor leads the surviving Rezzies, Kangs and Caretakers as they draw the line together on the 245th floor against the systematic cleansing of all life by Kroagnon and his robotic Cleaners.
The Bannermen have successfully wiped out all but the last of the Chimeron - Delta, the queen, no less. She escapes with an egg and boards an intergalactic bus of Navarino vacationers heading for 1959 Earth to visit Disneyland. On that bus is Mel, followed closely by the Doctor in his TARDIS.
The Bannermen are coming to Earth thanks to a signal from an opportunistic bounty hunter recognizing Delta. DIsneyland is safe due to a collision with a satellite that redirects the vacationers to the Shangri-La Holiday Camp in South Wales. There, the camp mechanic is smitten by the Queen Delta and her newly hatched green baby.
The Doctor's party rallies to the house of an elderly beekeeper where the young Chimeron princess hits another growth spurt that reveals the reason why the Bannermen want the Chimeron wiped out. Meanwhile, Gavrok sets a deadly booby-trap right outside the Doctor's TARDIS, and Billy makes a heedless and irrevocable decision.
In Iceworld, a trading port on the dark side of planet Svartos, the Doctor chances across Sabalom Glitz and joins him on a treasure hunt in the frozen caverns of the planet where a dragon is rumored to resides. Meanwhile Mel and a recently fired waitress named Ace run afoul of Kane, the icy director of Iceworld, whose frozen touch means death.
While Mel and Ace run from Glitz's former crewmen (whom he sold to Kane), officers Belazs and Kracauer conspire to overthrow Kane. The Doctor, meanwhile, discovers there really is a dragon in the ice caverns, which turns out to be a bio-mechanoid with a very interesting function.
At last learning the location of the missing key to his spaceship, Kane has the dragon hunted down and Iceworld brutally purged of all visitors; but, the Doctor, visiting the Ice Garden, learns something significant that will put the chagrin on Kane's grand plans for home world vengeance.
The Doctor and Ace travel back to London in November 1963 and are caught in the middle of a Dalek civil war.
With two factions of Daleks involved in a race war on Earth, the Doctor takes care of old business by having the Hand of Omega ceremoniously but quietly buried in a churchyard. His actions do not go unobserved, and leaving behind a bored Ace without a purposeful outlet could spell trouble as well.
The Doctor plans to let one of the Dalek factions have the Hand of Omega (but not too easily, of course) while keeping Gilmore and his military men preoccupied in a safe territory, but that plan could be threatened by a mole in their midst and a miscalculation on the Doctor's part.
The Imperial Dalek Emperor reveals himself to be an old, familiar adversary of the Doctor. Now with the Hand of Omega, the Imperial Daleks expect to rule over both time and the Time Lords. The only snag in the Doctor's plan to thwart this may come from the fascist mole in Gilmore's unit - discovered and detained but escaped to cause mischief, putting both Ace's life and the Doctor's plan at risk.
The Doctor and Ace arrive on the earth colony of Terra Alpha, a colony that is under the misguided dictatorship of Helen A. On Terra Alpha, sadness and misery are capital crimes, and "killjoys' (anyone who does not adhere to these strict laws) are executed on the spot by Helen A's secret police, a motley crew of female assassins known only as "The Happiness Patrol". The Doctor and Ace make it their mission to put a stop to Helen A's harsh regime, but that's all easier said than done. What with The Happiness Patrol, undercover snoop Silas P, and Helen A's carnivorous little pet Fifi to contend with, they can do with all the help they can get, joining forces with Earl Sigma, rogue Happiness Patrol member Susan Q and the native inhabitants of Terra Alpha who were driven into the pipes and sewers of the colony. There is one threat that the Doctor hasn't banked on - Helen A's prized chief executioner, a crazed android and creator of killer confectionery. This robotic menace is known only as The Kandy Man, and he's not one to be trifled with.
The Doctor and Earl manage to escape from the Kandy Man and join up with the planet's natives, the Pipe People, enlisting their help to rescue Ace.
Helen A has sentenced Ace and Susan Q to the last show at the forum but the Doctor has a plan to rescue them and topple Helen A's regime.
Earth faces imminent destruction. Nemesis, a comet containing a statue composed of validium (living metal) is due to strike, needing only its bow and arrow to achieve critical mass and become active. Four converging parties know of its power: the Doctor, neo-Nazi assault troops from South America, a 17th century noblewoman steeped in the black arts (in whose image the Nemesis statue was fashioned), and discreet but lethal extra-terrestrials.
As hostilities break out between factions vying for ownership of the comet, the Doctor goes after the worst of the lot - Cybermen, using Ace's upgraded boom box to flood Cyber Communications with jazz music while trying to locate the whereabouts of the fleet beyond this mere scouting party.
With the Cyber Fleet poised nearby, the Doctor may have no choice but to let them have Nemesis. Meanwhile, Lady Peinforte and Richard navigate modern society, De Flores encounters an open betrayal, and Ace combats Cybermen with a slingshot.
The Doctor persuades Ace to visit the Psychic Circus on the planet Segonax despite her fear of clowns.
The Doctor and Ace reach the Psychic Circus, where the Doctor is imprisoned with the other contestants while Ace draws the attention of the Chief Clown.
Mags helps the Doctor escape and Deadbeat leads him to Ace, where Bellboy tells them what happened to the Psychic Circus.
The Doctor goes into the Dark Circus and defeats the Gods Of Ragnarok, helped by Ace, Kingpin and Mags. Captain Cook, the clowns and the Chief Clown are killed. The circuses are destroyed.
Knights from a parallel universe arrive on Earth to find the legendary sword Excalibur. Only the Doctor and Ace with the assistance of Brigadier Lethbridge Stewart can save the Earth from total catastrophe.
The Doctor and Ace discover a stone spaceship underneath Warmsley's archaeological dig while Mordred summons Morgaine to Earth's dimension.
The Brigadier rescues the Doctor from the stone spaceship before they set out to locate Morgaine before she gains Excalibur.
Morgaine forces Ace and Shou Yuing to hand over Excalibur by threatening to release the Destroyer, so the Doctor and the Brigadier enter a dimensional portal to stop her.
The Doctor takes Ace to an old 'haunted' house called Gabriel Chase in the year 1883, 100 years before events that took place within that very house in her personal past.
The Doctor manages to rescue Ace from the husks and then tries to uncover the truth about the goings on in Josiah's house.
The Doctor attempts to convince Light to put an end to Smith's schemes but instead Light aims to put an end to Earth's evolution.
The Doctor and Ace travel to a naval base off the coast of Northumberland towards the end of World War II, where the Time Lord and his companion become entangled in an old Viking curse.
The Doctor and Ace manage to convince Sorin to release them while Millington and Judson attempt to translate the Viking runes.
The Doctor and his friends come under attack from the Haemavores, allowing Millington to retrieve the flask containing Fenric's essence.
Fenric is loose and planning to use the Ancient Haemovore to poison the Earth with chemicals, unless the Doctor can defeat him in their centuries old game.
A spate of mysterious disappearances in Perivale have been recently taking place. Meaning that the Doctor's decision to take Ace to her home village couldn't come at a better time.
The Doctor and Paterson manage to escape from the Master and join up with Ace and her friends, where the Doctor tries to find a way to get them all off the planet before it explodes.
Ace manages to transport the Doctor and the others back to Perivale but the Master is also there, preparing for a final showdown with the Doctor.
