Rerun of the second What a Cartoon! pilot.

After Dexter orders and eats a giant burrito, he suffers severe stomach pains. Believing a test the computer gave him, he assumes that he has only 30 minutes to live.

Dee Dee builds a tree house and allows everyone inside except Dexter, in revenge for the times he kicked her out of his lab.

After a Puppet Pals marathon, Krunk dreams the Puppet Pals are attacking puppet versions of Major Glory and Valhallen.

Dee Dee gets a song stuck in her head, which is actually a virus. Dexter and Mom soon catch it, and Dexter has to reverse the effects of this. He succeeds at the end, not knowing that Dad also caught it.

Dexter and Dee Dee realize that they make a good team, so they decide to do stuff together, but doing so makes things worse.

Dexter is trapped in his school by the janitor in revenge for making him work late everyday due to Dexter’s habit of leaving the school last everyday.

Parodying The Pink Panther, Dexter is trying to paint his lab blue, but Dee Dee wants to make it pink.

When Dee Dee claims that anything can be hers because Dexter “doesn’t have his name on it”, he invents a label-making gun.

Monkey encounters Simion (Maurice LaMarche), an intelligent anthropomorphic chimpanzee who seeks vengeance on humans for turning him into his current state.

When his television show is interrupted by the Emergency Broadcast System, Dexter sets about fixing any emergencies in the neighborhood to make the signal go away.

Monkey encounters an alien hunter named Huntor (Ed Gilbert) and must fight him to save Agent Honeydew and Commander Chief.

Tired of bathing, Dexter laminates himself to stay clean.

Dexter creates the ultimate robot to replace his Robo-Dexo 2000.

Dexter and Dee Dee go to South America to catch the legendary chupacabra.

After watching a horror film, Dexter and his father become easily frightened.

Dee Dee wins a golden diskette, earning her a free trip to the laboratory of Professor Hawk (Tom Kenny), one of Dexter’s favorite scientists.

Dexter calls upon the “shoe gnomes” to repair his shoes, but he seeks out Dee Dee to rid himself of them afterwards.

Dexter’s life story, from his birth to the creation of his secret laboratory, is retold as an opera.

On Mother’s Day, Dexter’s mother has her gloves taken by the family so that she can relax and not do housework, but she is unable to adjust to a life where she cannot keep the house clean.

Dexter’s father tries to get himself and Dexter to his fishing spot before sunrise so that they can start fishing before others arrive.

Dexter finds the exact opposite of his family, a hyperactive boy who is like Dee Dee and has scientist parents who are like Dexter. Sensing to fit in, he switches places with the boy.

Following the destruction of his lab by Dexter and Dee Dee (in the episode Dexter’s Rival), Mandark turns to magic to beat Dexter at the science fair.

Dexter and Dee Dee protect their mother’s muffins from their muffin-loving father while she is out shopping.