Dexter is a Boy Genius Who has a secret lab in his room his Mom and Dad don't know about it, but his older sister Dee Dee Does and they go on wacky (yet Sci-fi) Capers
Beau TieDee-Dee has a new boyfriend who also likes science and Einstein, and soon the boy finds himself caught in a vicious tug of war...
Remember Me?
E2
Remember Me?Dexter is hit by a wrench while working on a device, and suffers amnesia, Dee Dee decides to mess with his head
Overlabbing
E3
OverlabbingDexter and Mandark drill underground to expand their labs, but end up overlapping each other's work. They secretly devise a plan to destroy each other.
Sis-Tem Error
E4
Sis-Tem ErrorDee Dee accidentally breaks down Dexter's lab, and she tries to not and let him know its broken.
Bad Cable Manners
E5
Bad Cable MannersDad wants cable really bad, so Dexter illegally pirates cable for him.
Dexter's Library
E6
Dexter's LibraryWhen Dexter becomes the head of a library, he inforces the rules really hard, driving everyone crazy.
The Scrying Game
E7
The Scrying GameDee Dee learns a new game that can ""predict peoples futures"". She uses it on Dexter, and finds out that the game REALLY DOES predict peoples futures...
Monstrosi-Dee Dee
E8
Monstrosi-Dee DeeA Monster starts roaming Dexter's lab, although Dexter doesnt know its just Dee Dee, who ate an apple in a failed lab experiment.
Dad Man Walking
E9
Dad Man WalkingDexte'rs father begins to sleepwalk, and accidently stumbles into Dexter's Lab
Dexter's Little Dilemma
E10
Dexter's Little DilemmaDexter accidentally shrinks his parents, and puts them into a model of there house. Although the house isnt completed, so Dexter must find a way to reverse it before they know the truth.
Faux Chapeau
E11
Faux ChapeauDexter creates a new invention and wears it on his head. It suddenly becomes the latest fashion craze at Huber elementry.
D²
E12
D²Dexter and Dee Dee realise when they work together, they make a pretty good team.
Head Band
E13
Head BandDee Dee has a song stuck in her head. Literally.
Stuffed Animal House
E14
Stuffed Animal HouseDee Dee's stuffed animals come to life and roam the house. Dee Dee and Dexter must get them before Mom and Dad find out.
Used Ink
E15
Used InkDexter creates an ink in which lets him command them to do whatever he wants them to do. Although when Mandark gets a hold of it, Dexter is the one being the slave.
School Girl Crushed
E16
School Girl CrushedDecxter and Mandark are both outperformed by a new girl attending the school, jealous, they become allies to deal with her.
Chess Mom
E17
Chess MomMom thinks she should spend quality time and watch Dexter in his chess comatition. Although, she really embarasses Dexter while hes there...
Father Knows Least
E18
Father Knows LeastDad gets fired from his job, and has to do the same job Mom does. He realises it isnt as easy as it looks.
Dexter the Barbarian
E19
Dexter the BarbarianDexter goes on a quest. His quest is to reach the bathroom before he explodes.
Tuber Time
E20
Tuber TimeWhen Dexter realises the power of the potato, he redesigns his lab to work on it.
Sore Eyes
E21
Sore EyesDexter is tired of wearing glasses, so he uses laser surgery on his eyes to make him have 1/20 vision. Although, he learns than no human should be able to see THIS well...
Babe Sitter
E22
Babe SitterDee Dee goes over to Mandark's house to baby sit him, and Mandark likes that idea.
Mountain Mandark
E23
Mountain MandarkMandark drops technology and starts being more in touch with nature.
2Geniuses 2Gether 4Ever
E24
2Geniuses 2Gether 4EverDexter decides its better if him and Mandark work together, although in the end Dexter does all the work while Mandark does nothing
Height Unseen
E25
Height UnseenDexter is tired of being short, since his old plan of growing himself didnt work, he decides to make everyone shorter than him.
Bygone Errors
E26
Bygone ErrorsThis takes place in the future, where Old Man Dexter tells about his ""glory days"". And Old lady Dee Dee keeps on adding her opinions as well...
Folly Calls
E27
Folly CallsWhen Dee Dee accidentally chops off her pigtail, Dexter gives her some hair growth potion. Although when she uses it, her hair floods the entire house.
Voice Over
E28
Voice OverWhen Dexter's Computer gets Laryngitus, Dexter must find a replacement voice for her.
The Blonde Leading the Blonde
E29
The Blonde Leading the BlondeDexter refuses to see that blonde's have more fun, so he dyes Dee Dee's hair to prove it.
Comic Stripper
E30
Comic StripperDexter finds out that all of Mandark's plans are taken from a comic book. This way, he can get ready.
Tee Party
E31
Tee PartyDexter and his dad enter a Golf tournament, with Dad eager to get his hands on the Trophy, but there is one problem: he is hopeless at Golf, so Dexter decides to help with a remote controlled Golf ball
Dexter's Wacky Races
E32
Dexter's Wacky RacesDexter, Monkey, The Justice Freinds, Dee-Dee, her imaginary freind Coosie, Mandark, his parents, and Dexter's Parents participate in a cross-country race
The Lab of Tomorrow
E33
The Lab of TomorrowMonkey narrates a documentry of the future of Laboratories and sciences.
Chicken Scratch
E34
Chicken ScratchWhen Dexter gets chicken pox, Dee Dee warns him with a ridiculous story about some hens that pecked children at night leaving pimples on them that if scratched would turn into evil contaminated chickens.
Garage Sale
E35
Garage SaleDexters parents accidentally sell Dexter's latest invention, and it is bought by Mandark.
They Got Chops
E36
They Got ChopsDee Dee starts layin' down the Judo on Dexter, then Dexter learns how to fight back.
Poetic Injustice
E37
Poetic InjusticeDexter falls in love with a new girl at his school, but decides to impress her with poetry rather than science.
Comedy of Feathers
E38
Comedy of FeathersWhen Dee Dee sees an Ostrage at the Zoo, she wants one of her own as a pet.
Cast of Season 4
Candi MiloDexter (voice)
Kat CressidaDee Dee (voice)
Jeff BennettDad (voice)
Kath SoucieMom (voice)
Eddie DeezenMandark (voice)
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