After a fright from Dee Dee, Dexter lays down in the beard growing machine and tries to grow a beard like his hero, Action Hank. Unfortunately, everyone thinks he's a hero.

Mandark doesn't know that his pet duck is really Quackor the Fowl, Monkey's rival. Quackor overhears Mandark talking in his sleep about destroying Dexter's lab and tries to do it, unaware that Monkey is Dexter's pet.

Dexter prevents Dee Dee from destroying some ants. In order to teach her about ants, Dexter and Dee enter Dexter's ant farm. The ants think Dexter is a criminal and has him fight to the death with a stronger ant.

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

At the Chubby Cheese pizza restaurant, Dexter wears a Chubby Cheese hat and tries to slow down the Whack The Weasel machine to win a stuffed Monkey doll before Dee Dee does.

One of Dexter's robots becomes Dee Dee's servant when she removes a wrench that froze him up, but the robot is willing to destroy anyone who is mean to her or scolds her, including Dexter.

When Dexter's friends tire of the complicated traps he sets up as Dungeon Master (he has their character's killed every time), they put Dee Dee in charge for a change of pace.

Dexter's father gets challenged to an arm wrestling match against a local champion at a truck stop, when he causes the champion to lose for the first time, but refuses to do so even when he trashes the family car. He finally accepts the challenge when he slams the door in Mom's face. Dee Dee knows he'll get creamed, so Dexter builds him a robotic arm to help him win the match.

Dexter uses radiation therapy so he can like vegetables, it actually causes him to only eat vegetables, also, the therapy has consequences if Dexter goes too long without them. He turns into a Parody of The Incredible Hulk without vegetables.

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.

Dexter oversleeps and still has to finish his homework along with getting ready for school and eating breakfast, so he creates a helmet that expands thirty seconds into thirty minutes, but realizes that slowing down time is more detrimental than helpful. When he gets everything done, the helmet shuts off. But Dee Dee blocks his door causing him to miss the bus. When Dexter asks Dee Dee why, she replies "Snow Day, school's canceled!". Dexter realizes he did all that rushing around for nothing!

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 fuses Dee Dee with the family car by accident, causing mayhem. A Parody of Herbie the Love Bug.

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

Dee Dee's new dance annoys Dexter to no end.

Dexter calls upon the "shoe gnomes" to repair his boots, but can't rid himself of them afterwards. The only way to get rid of them, according to Dee Dee, is to kick them in the butt. Dexter gets rid of the last one with his boot, but it's damaged again.

Dexter ends up in the "old part of the lab" where his earliest inventions, long since forgotten, are not too happy to see him. They are mad at him for saying they were his greatest inventions, then moved on to another great invention.

Dexter and Dee Dee label everything in the house. When their parents get home, they mistake Dexter for Dee Dee (he had a Dee Dee label on his forehead), but he already blamed Dee Dee for the chaos.

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.

When Dee Dee refuses to flush their gold fish down the toilet, the ghost of the fish haunts them.

Dee Dee and Dexter win a free pass to Professor Hawk's magic factory after finding the golden diskette.

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

In an attempt to be popular with his ""friends"", Dexter makes his own Mayor Glory Action Figure.

In a whole parody of ""Speed Racer"", Dexter and Mandark compete on a race.

Dexter can't get into a roller coaster because he's too small so he makes himself taller.

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.

It's not a great day for science when Dexter has bad luck due to the position of the stars.

Mom makes Dexter go outside and ride a bike, thing that turns into a Dexter-Dee Dee chase.

While at the beach, Dee Dee (who's wearing a mermaid swimsuit) gets captured by a maniac sailor so Dexter must rescue her.

Dexter must go to the back of the school bus to retrieve his pencil, where another kid got lost years ago.

Krunk stays awake all night watching The Puppet Pals Show Marathon, so his brain starts playing him tricks.

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

While the family is at the woods, Dexter goes searching for the Mighty Bigfoot, if Dee Dee doesn't find him first.

Dee Dee photographs Dexter's secret lab.