Following a mishap in his lab, Dexter ends up in the old, long-abandoned part of the lab, and discovers his early, neglected inventions.

During a trip to Japan as part of a student exchange program, Dexter accidentally releases a giant monster with an axe-like head from a volcano, forcing him to enlist the aid of his family to defeat it.

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

Dee Dee enters the land of her imaginary friend Koosalagoopagoop.

Mandark disguises himself as Dexter’s mom to get into Dexter’s Lab. Unfortunately for Mandark, he now has to deal with Dexter, Dad, and Dee Dee’s requests, which are too much for him.

Dexter and Dee Dee listen in on their parents’ conversation; they are playing Scrabble, but the way they talk makes it sound like Dad was cheating on Mom

With only one television in their apartment, Major Glory, Krunk, and Valhallen disagree on what to watch: Major Glory’s televised capture of the Disgruntled Postman, TV Puppet Pals, or the monster truck pull.

While out for dinner at a pizza restaurant, Dexter tries to slow down the “Whack the Weasel” machine to win a stuffed Monkey doll before Dee Dee does. Security captures him for tampering with the machine, and he falls into the hands of a mad scientist.

Mandark enters a surfing contest and tries to cheat his way to victory to win Dee Dee’s heart from another surfer.

When Dexter cannot get the ice cream truck to stop for him, he creates a series of obstacles to do so.

A little girl with big eyes falls in love with Dexter and follows him everywhere after he returns a toy she dropped earlier, much to his chagrin.

When Dexter accidentally hits his mother with a ray of energy, she gains superpowers.

When their father makes Dexter and Dee Dee switch rooms, Dexter believes that Dee Dee is destroying his lab and destroys her room in retaliation.

Dexter catches the chicken pox, and Dee Dee tells him a ridiculous tale that if he keeps scratching them, he will turn into an evil chicken. Dexter completely restrains himself so that he will not have to scratch it; unfortunately, he is unable to resist and his nonstop scratching eventually does just that.

Despite warnings from the computer, Dexter consumes too much power while performing numerous experiments, causing his lab to shut down.

Peltra wants to turn Monkey into a fur coat.

Dee Dee’s new dance moves annoy Dexter to no end.

After a crime prevention talk at school, Dee Dee, Lee Lee, and Mee Mee become crime fighters, but they unintentionally end up being neighborhood criminals.

To clone a dinosaur with an incomplete DNA sequence, Dexter uses his dog’s genetic code to fill in the gaps.

When Dexter becomes the victim of Dee Dee’s snowballs, their father teaches him to be the snowball terror that he used to be in his youth.

Created and narrated by a six-and-a-half-year-old boy named Tyler Samuel Lee, who sent a tape containing the episode’s audio to Cartoon Network,[9] the story follows Dexter and Mandark’s robot “brother” Computress teaming up to make Mandark’s head shrink.

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.

When Dee Dee hides the core of Dexter’s nuclear lamp, he must decipher her clues within one hour to find it.

Since his studying is interrupting his favorite TV shows, Dexter creates a helmet to absorb the shows directly. However, the plan backfires when he randomly snaps into television-based outrages.