The misadventures of a boy genius and his annoying sister.
Genre: Animation, Short, Adventure
Cast:Kath Soucie , Jeff Bennett , Christine Cavanaugh , Frank Welker , Tom Kenny , Kat Cressida , Allison Moore , Rob Paulsen , Candi Milo , Eddie Deezen , Mako , Dee Bradley Baker , Kimberly Brooks , Daran Norris , Robert Ridgely , Dom DeLuise , Pamela Adlon , Maurice LaMarche
When Dexter creates a new invention to get DeeDee's rudeness under control, her foolish antics cause both her and Dexter to end up in the machine, resulting in them becoming polite, and their rude, evil counterparts being made. Now, the polite Dexter and DeeDee must find a way to rid of the disrespectful clones of themselves before they cause even more trouble.
Dexter decides to emulate his hero, Action Hank, and grow a synthetic beard to make himself more rugged.
When Dexter's brain transplant experiment goes awry, his brain is switched with that of a mouse.
"D & DD" Dee Dee wants to play Monsters & Mazes with Dexter and his friends. Against Dexter's wishes, she is made the game master! Dexter is relegated to a secondary character, but his friends have a great time in Dee Dee's world. "Ham Hocks n' Arm Locks" While on a road trip, car trouble forces Dexter and his family to pull into a truck stop. When Earl, a local arm wrestling champ, gets Dad angry, they decide to have an arm wrestling contest. Knowing Dad has no chance of winning, Dexter comes up with a technological way to make Dad stronger.
Dexter is denied dessert when he doesn't finish his vegetables. He decides to use gamma radiation to alter his tastebuds.
Dexter tries to entertain his ill sister by reading to her out of his science text. Bored by protons and neutrons, Dee Dee uses her imagination to make up a story of her own.
Dee Dee sees Big Daddy Fat doing a new dance on "Groove Train" and has to learn it.
During a fight with his sister over the chair in front of the TV, Dexter gets the idea to start labeling his things.
"Filet of Soul": Dexter and Dee Dee are haunted by the ghost of a dead goldfish. "Golden Diskette": Dexter obsessed with finding a golden diskette to get a unprecedented tour of an eccentric inventor's mysterious factory.
Dee Dee keeps pelting Dexter with snowballs.
When the whole family goes to the carnival, Dexter can't go on a ride because he's too short. Using his lab, he makes himself grow taller, but can't stop.
In "A HARD DAY'S DAY", every day is a fine day for science until things take a turn for the worse thanks to the position of the stars in the sky. In "ROAD RASH", Dexter's mom forces Dexter to go outside and ride a bike, with Dee Dee challenging him to catch her on her roller blades, resulting in a chase similar to one between Wile E. Coyote and the Road Runner. In "OCEAN COMMOTION", on a visit to the beach, Dee Dee (dressed in a mermaid bathing suit) gets kidnapped by some manic seafarin' sailors and Dexter vows to save her.
When Dexter is harassed by two bullies and forced to go into the back of a school bus chasing his #2 writing implement, he must brave the legend of little Billy Blumberg who disappeared back there years ago.
While vacationing in the woods with his family, Dexter finds Sasquatch tracks and hopes to photograph the mythical beast.
Dexter and his friends attend a Star Check convention dressed as their favorite characters; Dexter covers his body in plastic so that he doesn't have to wash his hands before dinner; Dexter creates a device to stop the ice cream van.
When Dexter and Dee Dee get their Action Hank and Pony Puffs decoder rings mixed up (respectively), each goes through the other's initiation.
When Dee Dee rescues a wounded turtle from a hawk's talons, Dexter helps rebuild the little shelled animal into a bionic powerhouse.
Dee Dee wants to join the choir, but her bad singing is making it impossible for Dexter to work.; An emergency broadcast signal interrupts Dexter's favorite show; Dee Dee and Dexter go to the city to find Dee Dee's teddy bear.
Dexter and Dee Dee get stuck together by a Chinese Finger Puzzle, they track it to its maker in Chinatown, USA.
It's picture day at school and Dexter must face the truth: he is not photogenic. Using Dee Dee's Teen magazine as a guide for restructuring his physical appearance, Dexter becomes grotesquely handsome.
Being too young to watch an R-rated movie, Dexter tries to make Dee Dee and himself older than Mom and Dad.
"Dad tries to teach Dexter a sport, like all the other fathers and sons. But Dexter is just horrible at every sport - from baseball to football, soccer to badminton, Dexter stinks!
When Dexter has to have a "parent-principal" meeting at school, the boy genius is distraught. He's never been in trouble so how can he disappoint his parents now?
Dexter disguises Dee Dee as his mother when he needs to have a parent/teacher conference at school; Dexter turns into a crazy clown after being bitten by one at a party.
When Dexter takes in a lost Labrador Retriever, he decides to enable the dog to talk.
Dexter wolfs down a burrito and suddenly feels a growing pain inside. After having his computer analyze the pain, Dexter thinks he's going to explode.
Mandark and Dexter battle each other with Rushmore Presidents Washington and Lincoln brought to life. / Dexter has a metal eating termite named Timmy as a pet. / Dee Dee uses way too much of Dexter's super growth formula in the backyard and turns the plants into man eating monsters.
When Dexter returns a little girl's stuffed bunny to her, she falls in love with him. She is soon stalking Dexter. With the help of Dee Dee, Dexter is eventually able to divert the girl's affections toward another little boy.
Dexter wants to meet the original genius who invented fire and zips back in time. He grabs the unsuspecting and frightened caveman and brings him back to the lab.
Dee Dee and Ninja Clan fight for who delivers the newspapers; Dexter and Dee Dee destroy Dad's bowling trophy; Dee Dee builds a tree house in the garden.
When a bully who hates kids with funny accents sets his sights on Dexter, the boy genius has until 3:00 before he receives an after-school beating.
Dad tries to watch a golf game but is constantly interrupted; Dexter gains popularity with broken glasses; Dexter brings home an eccentric man with a lot of electronics on his head.
While Dexter is working in his lab, one of the light bulbs burns out. Mom takes him to a giant hardware store in an exhausting journey to replace it.
Dexter develops a reverse belt. While wearing the belt to get a snack in the kitchen, Dee Dee sneaks into the lab to play with the belt controls.
Dexter builds Dee Dee a huge robot after she tells him he can't. The problem begins when they use their robots to try to save a volcanic island from eruption.
In an episode that mirrors "Dexter's Rival," Dee Dee goes head to head with the new student in her dance class, Olga - Mandark's sister.
Dexter and Dee Dee are unknowingly the focus of a "Wild Kingdom" type animal documentary. During Dexter's bathing ritual, he realizes he's being observed, runs, gets tranquilized, and upon awakening discovers he's been tagged.
Dee Dee uses the lab computer to send her wish list to Santa Claus, but Dexter mocks her because he doesn't believe in the Santa.
Through opera we see Dexter's origins leading up to the creation of his laboratory.
In Japan as part of a student exchange program, Dexter gets involved in a battle.