S1.E1 ∙ The Night Stalker: Delroy Grant

Nicknamed 'The Night Stalker,' Delroy Grant would sneak into the homes of the elderly, disconnect the electricity, and assault his victims before disappearing into the night.

S1.E2 ∙ Levi Bellfield

Levi Bellfield is one of the most notorious serial killers in modern British history, most famously committing the brutal murders of Milly Dowler, Marsha McDonnell and Amelie Delagrange. In 2002, Milly Dowler was abducted and murdered but it would be months before her body was found. In the years that followed, two more women were also killed in brutal attacks. Seeing a link between the murders, Colin Sutton launched a murder hunt and eventually brought 'the bus stop killer' to justice.

S1.E3 ∙ The murder of Chris Donovan

Christopher Donovan, his brother Philip and friend Richard were in high spirits walking home in the early hours one Saturday morning when they were attacked by a gang of thugs, an attack that would end in Christopher's death. The gang kicked and punched Christopher, knocking him to the ground his lifeless body was then hit by a passing car in a final blow. After a painstaking investigation which included reconstructions using tailor's dummies, a series of witnesses came forward to identify the three killers who were later sentenced to life in prison.

S1.E4 ∙ The murder of Clare Bernal

Harvey Nichols beauty consultant Clare Bernal and security guard Michael Pech had only been on three dates when he began a sustained campaign of stalking against her. Eventually, she reported his behaviour to the police - he had been following her, texting her up to 50 times a day, threatening her - and he was arrested. On September 15th, 2005, Pech was out on bail awaiting sentencing for harassment when he walked into Harvey Nichols and shot the 22-year-old once in the back of the head then three times in the face. She died instantly and he then turned the gun on himself.

S1.E5 ∙ The murder of Bridie Skehan

Nimpha Ong and Ahmed Al-Haddad were tenants of 92-year-old Bridget 'Bridie' Skehan, a wealthy former socialite, at her Bayswater flat when they brutally beat her to death in a gratuitously savage attack in December 2002, in a bid to get their hands on her fortune. Her body was found in a shed to the rear of the building a few days later, having been bundled into a cardboard box and concealed. When the pair were arrested, they blamed each other for the crime but were both eventually convicted of murdering Bridie and given life sentences.

S1.E6 ∙ The murder of Krystal Hart

Thomas Hughes murdered pregnant, 22-year-old Krystal Hart with two gunshots to the head on the doorstep of her home in a ruthless execution style murder. Following a long-running dispute between Hart and 'neighbour from hell' Angie Brewer, Hughes took it upon himself to carry out the revenge attack after becoming besotted with Brewer. In a surprising twist, there were CCTV cameras placed above the door to discourage and monitor the feud which Thomas Hughes either ignored or knew nothing of which would help to secure a conviction during the trial. But first, the police had to track Hughes down.

S1.E7 ∙ The disappearance of Maureen Hale

In June 1999, Maureen Hale vanished without a trace, leaving her husband and children behind. Police had long suspected her millionaire husband Martin of killing her after she had demanded a divorce and with damning evidence against him, he was arrested and charged with her murder. That damning evidence? He had offered a friend a large sum of money to hire an incinerator and detectives found a note in his briefcase listing ways to dispose of a body. Martin Hale was found not guilty following the trial and Maureen's whereabouts has never been discovered.

S1.E8 ∙ The Dream City Cinema Fire

In 1994, David Lauwers fought with a doorman at the Dream City Cinema, after which he was ejected. He returned soon after with a can of petrol which he poured into the entrance and set alight.

S2.E1 ∙ The murder of Sally Lawrence

Iain Lawrence and wife Sally seemed to be the perfect couple, he was a successful airline pilot and she was the managing director of a thriving business and they doted on their young son. But behind closed doors, there was a darkness emerging and in 2012, Sally started divorce proceedings. Two days before their divorce was final Iain and Sally were together in his car when it crashed at speed on a quiet country road injuring Iain and killing Sally. An accident or were there darker forces at work?

S2.E2 ∙ The Cullens Robbery

Easter Monday April 1994, Colin Meek and Gary Mullins robbed the Cullens store in Islington. Thinking they had gotten away with it, they jumped into their waiting car about to make their getaway, only for both to be shot in the back of the head. Unbelievably both survived and revealed a twist that seemed straight out of a movie plot. When interviewed by Colin Sutton's officers, they admitted the armed robbery but had no idea who had shot and robbed them of the cash they had stolen, what Sutton and his team discovered during their investigation into the attempted murders remains one of the most amazing cases they ever worked on.

S2.E3 ∙ The murder of Sian Blake

In December 2015, Sian Blake, star of BBC soap Eastenders was reported missing along with her two young sons. As police interviewed members of her family, it became apparent that her partner, Arthur Simpson-Kent, was a person of interest and he was interviewed immediately. Two weeks later, during a search of Blake's home, police discovered three bodies in the garden and the missing persons case became a murder investigation, but suspect Arthur Simpson-Kent was nowhere to be found.

S2.E4 ∙ 4. The Murders of James Attfield and Nahid Almanea

In March 2014, 33 year-old James Attfield's lifeless body was found on a path with over 100 stab wounds. Detectives set upon a murder investigation but with no leads to follow, months passed with no answers. Then in June 2014, 31 year-old Nadia Almanea was attacked whilst walking to university. She was also stabbed multiple times and died at the scene but again, there is no obvious reason for the killing so detectives continued investigating both crimes separately. The town of Colchester was terrified, the police baffled and detectives were now hunting a potential serial killer - Meanwhile in Colchester, James Fairweather - a 15 year-old boy - posting social media posts, wishing for a life of celebrity - but unlike most teenagers James' stated career wish was to become a serial killer like his hero Peter Sutcliffe.

S2.E5 ∙ The murder of Catherine Corridan

Colin Sutton takes over as SIO of the murder squad team and is presented with a missing persons case by his new team. 8 years after she was last seen detectives re-opened the case into Catherine Corridan's disappearance. In an investigation that spanned the whole world - from Venice to the US and Australia - it turned out that the person responsible was closer than anyone could have imagined but without a body, how could they move forward? A case in which Colin Sutton and his team become deeply personally invested.

S2.E6 ∙ The murder of Miriam Baldock

When beloved and locally respected couple Miriam and Maurice Baldock are found brutally stabbed in their own beds the entire Maiden Lane Estate was shocked. Someone let themselves into their flat and stabbed them both in a frenzied attack, killing Miriam and seriously injuring Maurice. Who did this? Why? And was this the start of a murder spree? Colin and his detectives race to track down this violent killer and save the rest of the family.

S2.E7 ∙ The murder of Duncan Bone

In December 1992, the fire department were called to a flat in North London and when they entered the property, they found a scene more sinister than they could have imagined: the lifeless body of a middle aged man, brutally stabbed with several kitchen knives. As Colin Sutton and his team began their investigation just two days before Christmas, they uncovered a trail leading to two men targeting the gay community. Was Duncan Bone targeted simply because of his sexuality or was there more to the story than met the eye?

S2.E8 ∙ The murders of David Sheehan and Michael Zubrot

Occult enthusiast Mohammed Khaleel and David Sheehan's friendship was one fuelled by alcohol. Nights would often end in violent arguments and brawls with one attacking the other so when Sheehan was violently stabbed to death one night with his body covered in blood laid out as if part of a Satanic ritual, there was only one suspect. But after spending just seven years in prison for the murder of Sheehan, Khaleel was released, and within months had befriended charming but vulnerable Michael Zubrot. Zubrot was found dead from multiple stab wounds too. Mohamed Khaleel had struck again, police now needed to find him fast.

S2.E9 ∙ The murder of Allan Chappelow

Millionaire Allan Chappelow had been a recluse and hoarder for most of his adult life and because of this, the photographer living in a mansion near Hampstead Heath was known to neighbours as the local eccentric. In 2006, following alarming activity on his bank account, Sutton's team found his lifeless body under literally tons of clutter in his home. What followed was a complex investigation which took detectives to Switzerland and MI6.

S2.E10 ∙ The murder of Adrian Greenwood

Adrian Greenwood sold rare books, 1st edition Harry Potters among them, he also sold rare art by artists such as Banksy, he had been on TV so was a local celebrity. In April 2016, Greenwood was found dead at home, he had been stabbed multiple times and a first edition of Wind in The Willows was missing. But with no obvious suspects for the murder, detectives set out on an investigation to track down the killer, but where to start?

S3.E1 ∙ The Anthony Hardy Murders

S3.E2 ∙ The murder of Danielle Jones

S3.E3 ∙ The murder of Tom Cressman

S3.E4 ∙ The murder of Lee Harvey

S3.E5 ∙ The Peter Bryan Murders

S3.E6 ∙ The murder of Kayser Osman

S3.E7 ∙ The murder of Marta Ligman

S3.E8 ∙ The murder of Ronnie Cook