第 4 季 共 38 集
播出时间：2002年11月23日
第 1 集 Beau Tie
播出时间：2002年11月23日
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...
第 2 集 Remember Me
播出时间：2002年11月23日
Dexter is hit by a wrench while working on a device, and suffers amnesia, Dee Dee decides to mess with his head
第 3 集 Overlabbing
播出时间：2002年11月23日
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.
第 4 集 Sis-Tem Error
播出时间：2003年4月26日
Dee Dee accidentally breaks down Dexter's lab, and she tries to not and let him know its broken.
第 5 集 Bad Cable Manners
播出时间：2003年4月26日
Dad wants cable really bad, so Dexter illegally pirates cable for him.
第 6 集 Dexter's Library
播出时间：2003年4月26日
When Dexter becomes the head of a library, he inforces the rules really hard, driving everyone crazy.
第 7 集 The Scrying Game
播出时间：2003年5月3日
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...
第 8 集 Monstrosi-Dee Dee
播出时间：2003年5月3日
A Monster starts roaming Dexter's lab, although Dexter doesnt know its just Dee Dee, who ate an apple in a failed lab experiment.
第 9 集 Dad Man Walking
播出时间：2003年5月3日
Dexte'rs father begins to sleepwalk, and accidently stumbles into Dexter's Lab
第 10 集 Dexter's Little Dilemma
播出时间：2003年5月10日
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.
第 11 集 Faux Chapeau
播出时间：2003年5月10日
Dexter creates a new invention and wears it on his head. It suddenly becomes the latest fashion craze at Huber elementry.
第 12 集 D²
播出时间：2003年5月10日
Dexter and Dee Dee realise when they work together, they make a pretty good team.
第 13 集 Head Band
播出时间：2003年5月17日
Dee Dee has a song stuck in her head. Literally.
第 14 集 Stuffed Animal House
播出时间：2003年5月17日
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.
第 15 集 Used Ink
播出时间：2003年5月17日
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.
第 16 集 School Girl Crushed
播出时间：2003年5月24日
Decxter and Mandark are both outperformed by a new girl attending the school, jealous, they become allies to deal with her.
第 17 集 Chess Mom
播出时间：2003年5月24日
Mom thinks she should spend quality time and watch Dexter in his chess comatition. Although, she really embarasses Dexter while hes there...
第 18 集 Father Knows Least
播出时间：2003年5月24日
Dad gets fired from his job, and has to do the same job Mom does. He realises it isnt as easy as it looks.
第 19 集 Dexter the Barbarian
播出时间：2003年5月31日
Dexter goes on a quest. His quest is to reach the bathroom before he explodes.
第 20 集 Tuber Time
播出时间：2003年5月31日
When Dexter realises the power of the potato, he redesigns his lab to work on it.
第 21 集 Sore Eyes
播出时间：2003年5月31日
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...
第 22 集 Babe Sitter
播出时间：2003年9月6日
Dee Dee goes over to Mandark's house to baby sit him, and Mandark likes that idea.
第 23 集 Mountain Mandark
播出时间：2003年9月6日
Mandark drops technology and starts being more in touch with nature.
第 24 集 2Geniuses 2Gether 4Ever
播出时间：2003年9月6日
Dexter decides its better if him and Mandark work together, although in the end Dexter does all the work while Mandark does nothing
第 25 集 Height Unseen
播出时间：2003年9月13日
Dexter is tired of being short, since his old plan of growing himself didnt work, he decides to make everyone shorter than him.
第 26 集 Bygone Errors
播出时间：2003年9月13日
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...
第 27 集 Folly Calls
播出时间：2003年9月13日
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.
第 28 集 Voice Over
播出时间：2003年9月20日
When Dexter's Computer gets Laryngitus, Dexter must find a replacement voice for her.
第 29 集 Blonde Leading the Blonde
播出时间：2003年9月20日
Dexter refuses to see that blonde's have more fun, so he dyes Dee Dee's hair to prove it.
第 30 集 Comic Stripper
播出时间：2003年9月20日
Dexter finds out that all of Mandark's plans are taken from a comic book. This way, he can get ready.
第 31 集 Tee Party
播出时间：2003年9月27日
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
第 32 集 Dexter's Wacky Races
播出时间：2003年9月27日
Dexter, Monkey, The Justice Freinds, Dee-Dee, her imaginary freind Coosie, Mandark, his parents, and Dexter's Parents participate in a cross-country race
第 33 集 The Lab of Tomorrow
播出时间：2003年11月5日
Monkey narrates a documentry of the future of Laboratories and sciences.
第 34 集 Chicken Scratch
播出时间：2003年11月5日
第 35 集 Garage Sale
播出时间：2003年11月5日
Dexters parents accidentally sell Dexter's latest invention, and it is bought by Mandark.
第 36 集 They Got Chops
播出时间：2003年11月21日
Dee Dee starts layin' down the Judo on Dexter, then Dexter learns how to fight back.
第 37 集 Poetic Injustice
播出时间：2003年11月21日
Dexter falls in love with a new girl at his school, but decides to impress her with poetry rather than science.
第 38 集 Comedy of Feathers
播出时间：2003年11月21日
When Dee Dee sees an Ostrage at the Zoo, she wants one of her own as a pet.
