Dexter, a boy-genius with a secret laboratory, constantly battles his sister Dee Dee, who always gains access despite his best efforts to keep her out, as well as his arch-rival and neighbor, Mandark.
Dexter's Laboratory (Season 4)
Beau Tie (Episode 1) 7.0
Writer: Walt Dohrn
Air date: 2002-11-22
Runtime: 7 min
Overview: Dee-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? (Episode 2) 7.0
Writer: Kevin Kaliher
Air date: 2002-11-22
Runtime: 7 min
Overview: Dexter is hit by a wrench while working on a device, and suffers amnesia, Dee Dee decides to mess with his head
Overlabbing (Episode 3) 7.0
Writer: Clay Morrow
Air date: 2002-11-22
Runtime: 7 min
Overview: Dexter 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 (Episode 4) 7.0
Writer: Mark O'Hare
Air date: 2003-04-25
Runtime: 7 min
Overview: Dee Dee accidentally breaks down Dexter's lab, and she tries to not and let him know its broken.
Bad Cable Manners (Episode 5) 7.0
Writer: Clay Morrow
Air date: 2003-04-25
Runtime: 7 min
Overview: Dad wants cable really bad, so Dexter illegally pirates cable for him.
Dexter's Library (Episode 6) 7.0
Writer: Mark O'Hare
Air date: 2003-04-25
Runtime: 7 min
Overview: When Dexter becomes the head of a library, he inforces the rules really hard, driving everyone crazy.
The Scrying Game (Episode 7) 7.0
Writer: Mike Stern
Air date: 2003-05-02
Runtime: 7 min
Overview: Dee 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 (Episode 8) 7.0
Writer: Gabe Swarr
Air date: 2003-05-02
Runtime: 7 min
Overview: A 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 (Episode 9) 7.0
Writer: Carlos Ramos
Air date: 2003-05-02
Runtime: 7 min
Overview: Dexte'rs father begins to sleepwalk, and accidently stumbles into Dexter's Lab
Dexter's Little Dilemma (Episode 10) 7.0
Writer: Clay Morrow
Air date: 2003-05-09
Runtime: 7 min
Overview: Dexter 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 (Episode 11) 7.0
Writer: Chris Reccardi
Air date: 2003-05-09
Runtime: 7 min
Overview: Dexter creates a new invention and wears it on his head. It suddenly becomes the latest fashion craze at Huber elementry.
D² (Episode 12) 7.0
Writer: Mark O'Hare
Air date: 2003-05-09
Runtime: 7 min
Overview: Dexter and Dee Dee realise when they work together, they make a pretty good team.
Head Band (Episode 13) 7.0
Writer: Kevin Kaliher
Air date: 2003-05-16
Runtime: 7 min
Overview: Dee Dee has a song stuck in her head. Literally.
Stuffed Animal House (Episode 14) 7.0
Writer: Gabe Swarr
Air date: 2003-05-16
Runtime: 7 min
Overview: Dee 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 (Episode 15) 7.0
Writer: Carlos Ramos
Air date: 2003-05-16
Runtime: 7 min
Overview: Dexter 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 (Episode 16) 7.0
Writer: Charlie Bean
Air date: 2003-05-23
Runtime: 7 min
Overview: Decxter and Mandark are both outperformed by a new girl attending the school, jealous, they become allies to deal with her.
Chess Mom (Episode 17) 7.0
Writer: Charlie Bean
Air date: 2003-05-23
Runtime: 7 min
Overview: Mom thinks she should spend quality time and watch Dexter in his chess comatition. Although, she really embarasses Dexter while hes there...
Father Knows Least (Episode 18) 7.0
Writer: Carlos Ramos
Air date: 2003-05-23
Runtime: 7 min
Overview: Dad 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 (Episode 19) 7.0
Writer: Chris Savino
Air date: 2003-05-30
Runtime: 7 min
Overview: Dexter goes on a quest. His quest is to reach the bathroom before he explodes.
Tuber Time (Episode 20) 7.0
Writer: Mark O'Hare
Air date: 2003-05-30
Runtime: 7 min
Overview: When Dexter realises the power of the potato, he redesigns his lab to work on it.
Sore Eyes (Episode 21) 7.0
Writer: Bill Wray
Air date: 2003-05-30
Runtime: 7 min
Overview: Dexter 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 (Episode 22) 7.0
Writer: Mark O'Hare
Air date: 2003-09-05
Runtime: 7 min
Overview: Dee Dee goes over to Mandark's house to baby sit him, and Mandark likes that idea.
Mountain Mandark (Episode 23) 7.0
Writer: Kevin Kaliher
Air date: 2003-09-05
Runtime: 7 min
Overview: Mandark drops technology and starts being more in touch with nature.
2Geniuses 2Gether 4Ever (Episode 24) 7.0
Writer: Clay Morrow
Air date: 2003-09-05
Runtime: 7 min
Overview: Dexter decides its better if him and Mandark work together, although in the end Dexter does all the work while Mandark does nothing
Height Unseen (Episode 25) 7.0
Writer: Kevin Kaliher
Air date: 2003-09-12
Runtime: 7 min
Overview: Dexter is tired of being short, since his old plan of growing himself didnt work, he decides to make everyone shorter than him.
Bygone Errors (Episode 26) 7.0
Writer: Clay Morrow
Air date: 2003-09-12
Runtime: 7 min
Overview: This 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 (Episode 27) 7.0
Writer: Bobby London
Air date: 2003-09-12
Runtime: 7 min
Overview: When 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 (Episode 28) 7.0
Writer: Charlie Bean
Air date: 2003-09-19
Runtime: 7 min
Overview: When Dexter's Computer gets Laryngitus, Dexter must find a replacement voice for her.
The Blonde Leading the Blonde (Episode 29) 7.0
Writer: Aaron Springer
Air date: 2003-09-19
Runtime: 7 min
Overview: Dexter refuses to see that blonde's have more fun, so he dyes Dee Dee's hair to prove it.
Comic Stripper (Episode 30) 7.0
Writer: Chris Reccardi
Air date: 2003-09-19
Runtime: 7 min
Overview: Dexter finds out that all of Mandark's plans are taken from a comic book. This way, he can get ready.
Tee Party (Episode 31) 7.0
Writer: Aaron Springer
Air date: 2003-09-26
Runtime: 11 min
Overview: Dexter 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 (Episode 32) 7.0
Writer: Chris Reccardi
Air date: 2003-09-26
Runtime: 11 min
Overview: Dexter, 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 (Episode 33) 7.0
Writer: Charlie Bean
Air date: 2003-11-04
Runtime: 6 min
Overview: Monkey narrates a documentry of the future of Laboratories and sciences.
Chicken Scratch (Episode 34) 7.0
Air date: 2003-11-04
Runtime: 6 min
Garage Sale (Episode 35) 7.0
Writer: Clay Morrow
Air date: 2003-11-04
Runtime: 10 min
Overview: Dexters parents accidentally sell Dexter's latest invention, and it is bought by Mandark.
They Got Chops (Episode 36) 7.0
Writer: Kevin Kaliher
Air date: 2003-11-20
Runtime: 7 min
Overview: Dee Dee starts layin' down the Judo on Dexter, then Dexter learns how to fight back.
Poetic Injustice (Episode 37) 7.0
Writer: Mark O'Hare
Air date: 2003-11-20
Runtime: 7 min
Overview: Dexter falls in love with a new girl at his school, but decides to impress her with poetry rather than science.
Comedy of Feathers (Episode 38) 7.0
Writer: Genndy Tartakovsky
Air date: 2003-11-20
Runtime: 7 min
Overview: When Dee Dee sees an Ostrage at the Zoo, she wants one of her own as a pet.

Seasons

Episodes 38

Episodes 108

Episodes 36

Episodes 38

Episodes 9