Dexter switches his brain with a mouse, and must avoid his mother when she decides to exterminate him. A Parody of Tom and Jerry.

Dee Dee's imaginary friend comes to life and annoys Dexter. Dexter ends up wishing him away, then he realizes he made a terrible mistake.

Dee Dee Locks and the Ness Monster—Dexter's mother forces Dexter to read to Dee Dee when she's sick, but she makes up her own story after being bored by Dexter's story (which was actually a science article). The story is completely mixed up and makes no sense. Dexter ends up catching Dee Dee's illness.

Dexter accidentally takes a library book without checking it out, so he and Dee Dee try to put it back without being caught.

Dexter and Dee Dee compete against each other on a game show. Where Dexter can't seem to win.

Dexter tries to inject himself into Dee Dee to find a cure to the common cold, but ends up inside his dog. He believes Dee Dee has been infected with a dog virus. He is then mistaken for the first human virus to infect a dog by the vet.

Dad encourages Dexter to become the king of snow, as he was in his early days, until someone beated him.

Dee Dee steals the nuclear atom that Dexter needs to make his invention work, but she doesn't know that it will explode if Dexter doesn't find it on time.

Everybody except Dexter gets sick, so he makes himself a plastic bubble to get germ protection.

Dexter is sent to summer camp, in a place far away from civilization.

Dexter must stop Dee Dee from showing some pictures (that she took earlier in Dexter's lab) to Mom.

Dexter will do anything to make the ice cream vendor stop to get some ice cream.

Dexter and Dee Dee get their Action Hank and Pony Puff Secret Codes mixed up.

Dexter's robot takes over his lab.

Dexter makes himself invisible to make sure Mom and Dad give him what he wants for his birthday, the Ultimate Mayor Glory Action Figure.

Dexter and Dee Dee go to South America in order to find the chupacabras, an animal that Dexter created.

Dexter and Dee Dee go to the dumps to retrieve Dee Dee's lost teddy bear.

Dexter and Dee Dee get trapped with a Finger trap.

Dexter and Dee Dee want to become older, but instead they make everyone else a baby.

Dee-Dee refuses any kind of help from Dexter on her science project, when Dee-Dee shows Dexter her show-and-tell product, he criticises it heavily and offers his own..contributions

After Dexter gets bitten by a clown, he turns into one every night.

Dexter creates a device to keep his clothes clean.

Dexter uses a device to listen to what Dad is thinking, but the experiment backfires and everyone else can hear what Dexter is thinking.

Fearing that his memory might be limited, Dexter uses a device to save all his memories.

After being kicked out of Dexter's Lab (AGAIN) She goes and plays in her ""lab"".

Mom and Dad recall the moments that got them together.

Dee Dee goes over to Mandark's house to baby sit him, and Mandark likes that idea.

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...

When Dexter's Computer gets Laryngitus, Dexter must find a replacement voice for her.

Dexter falls in love with a new girl at his school, but decides to impress her with poetry rather than science.