Dee Dee Locks and the Ness Monster: Dexter's mother asks him to read a story to Dee Dee, who is sick. However, Dee Dee becomes bored of Dexter's story and invents her own story, Dee Dee Locks and the Loch Ness Monster, which is a spoof of Goldilocks and the Three Bears.

Backfire: Dexter tries to supe up the family car with anti-matter in an attempt to shorten road trips with his family due to Dee Dee's annoying nature, but ends up accidentally fusing Dee Dee with the car, causing mayhem.

Book 'Em: When Dee Dee causes Dexter to take a book from the library without checking it out by mistake, they sneak into the library at night to put it back without getting caught, but when Dee Dee's antics cause Dexter to scream at her to keep quiet, they get caught anyway.

Hunger Strikes: After being denied dessert by his parents for not eating his vegetables, Dexter uses radiation therapy so that he can like them, but it causes a severe side effect that turns him into an Incredible Hulk-like character if he goes too long without them.

The Koos Is Loose: Dee Dee's imaginary friend Koosalagoopagoop (Dom DeLuise) suddenly comes to life and starts annoying Dexter.

Morning Stretch: After staying up late at his lab, Dexter oversleeps and wakes up one minute before the school bus arrives. With no time to do his morning chores and homework, he pulls out a secret prototype device, which will convert his last 30 seconds into 30 minutes. unaware that the school has been closed due to a snowdown.

D & DD. When Dexter's friends become completely tired of Dexter setting complicated traps he sets up as Game Master (as well as his cheating) while playing a RPG game, they put Dee Dee as Game Master in his place. She completely changes the style of play, which annoys Dexter but impresses his friends.

Hamhocks and Armlocks. Dexter's father is challenged to an arm wrestling match by a man named Earl at a truck stop. Stunned at the strength of Earl and his determination to beat his father, Dexter attaches a robotic arm to his father to enable him to win.

Mom and Jerry: Dexter accidentally switches his brain with that of a mouse's and must avoid his mother when she decides to exterminate him.

Chubby Cheese: While out for dinner at the Chubby Cheese pizza restaurant, Dexter tries to slow down the "Whack the Weasel" machine to win a stuffed Monkey doll before Dee Dee does. When he gets captured by security for tampering with the machine, he falls into the hands of a mad scientist who seeks to use him as his assistant. DeeDee wins the monkey doll and realizes that Dexter is missing. She tries to tell her Mom, but she doesn't understand. Since it was time to go, DeeDee somehow sees that Dexter was in trouble, so she goes into the employee office. When she sees that the security has captured Dexter,the employees try to destroy her. Luckily, Dexter breaks free and grabs DeeDee. When the security catches DeeDee, Dexter jumps into the air, and took DeeDee. They fly out of the restaurant and crash through the back window of their own car, as it leaves the restaurant.

That Crazy Robot: One of Dexter's robots becomes Dee Dee's servant when she removes a wrench that froze him up and tries to destroy anyone who is mean to Dee Dee, including her friends, her mother and Dexter himself.

Beard to Be Feared: After watching an Action Hank movie on television, Dexter grows a beard like him to try to be cool, but is soon mistaken by the police for Action Hank himself.

Quackor the Fowl: Mandark decides to bring his lab duck Quackor for show and tell to counter Dexter and his lab monkey. Despite the fact that neither creature displays anything remarkable at school, Quackor is actually a supervillain going by the name of Quackor the Fowl, a fact not known to Mandark, similar to how Dexter is unaware that his lab monkey is a superhero.

Ant Pants: When Dexter catches Dee Dee killing some ants, he shrinks themselves to ant-size to take her inside an ant colony so that she can learn how organized the ants are. However, he eventu