In "Deedeemensional", Dee Dee time-travels to save Dexter from a monster. In "Magmanamus", Monkey goes up against a lava being that dislikes human-caused noise. In "Maternal Combat", when his mother falls, Dexter creates a robot mom to substitute for her.

Monkey must defend the city from a giant underground lava monster, Magmanamus, who cannot sleep because of the noise created by its residents.

When his mother falls ill, Dexter creates a robot to do her chores. Dee Dee gets hold of its remote control and wreaks havoc, forcing Dexter to create a second robot to counter Dee Dee's.

Dexter is forced to play dodgeball by his P. E. teacher. Constantly failing, Dexter builds a robotic exoskeleton to defend himself.

Intergalactic wrestling champion Rasslor challenges Earth's superheroes, including Monkey, with the planet's fate at stake.

In need of an assistant to operate his latest invention, Dexter performs a brain transplant on Dee Dee to make her smart enough to fulfill the role. With her new brain, Dee Dee proves to be more intelligent than Dexter.

Mandark Astronomanov, a new student at Dexter's school, seems to be superior to Dexter academically. Mandark forces Dexter to shut down his lab so that Mandark's lab can gain more power. However, with the help of Dee Dee, Dexter manages to destroy Mandark's lab.

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

Banned from watching a late-night movie due to his young age, Dexter uses his technology to artificially grow into adulthood, but Dee Dee tampers with his machine, causing Dexter to turn into an old man.

Dee Dee and her friends, Lee Lee and Mee Mee, enter Dexter's lab and wreak havoc. Dexter clones himself to stop them, but the girls too make clones of themselves.

Monkey's birthday party is interrupted by Barbequor an intergalactic villain who plans to eat the planets, and his sidekick, the Silver Spooner.

Rerun of "Dexter's Laboratory", the first "What a Cartoon!" pilot.

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

While on a date with Agent Honeydew, Monkey gets hypnotized by the music of the Organ Grindor who commands him to rob Fort Knox.

Due to overworking his brain, Dexter's mind shuts down, making him act idiotic.

After Dee Dee steals his critical invention, Dexter ventures into her room to find it.

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

Rerun of the second "What a Cartoon!" pilot.

Dexter and Dee Dee enter tryouts to become Major Glory's sidekick. When Dee Dee wins, Dexter realizes that fancy costumes are not the only criterion to become a superhero.

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.

Dexter and Dee Dee's father buys a video game for them to play, but the game sucks Dexter inside when he plugs in the cartridge, and it is up to Dee Dee to bring him out.

Dexter has a crush on his teenage babysitter Lisa. When he finds out that she has a boyfriend, he sabotages their relationship and accelerates his age by ten years in an attempt to win her heart.

Valhallen loses his magic ax and starts turning into a nerd, forcing Major Glory and Krunk to enter his room to find it.

When Dexter's nightmares become frequent and problematic, he invents a machine that allows him to have nice dreams, as long as Dee Dee can operate it properly while she is awake.

Suspicious that Dee Dee has not entered his lab even once on a particular day, Dexter shrinks himself and enters her room to spy on her. He soon becomes an unwilling character in Dee Dee's doll story, but he believes the story to be real.

While fighting Comrade Red and his gang, Krunk falls in love with his equivalent in their gang, She-Thing.

Dexter's new device allows him to study for the next day's French test while sleeping. It malfunctions, causing a single phrase -omelette du fromage- to repeat throughout the night, causing Dexter to wake up the next morning speaking nothing else except "omelette du fromage".

Dee Dee teaches Dexter how to live life her way instead of being lonely and purely focused on science.

Major Glory forces Krunk and Valhallen to tidy up their apartment for his Uncle Sam, who is coming over for a visit.

To learn more about girls, Dexter camouflages himself and enters Dee Dee's room, where she is having a sleepover with her friends Lee Lee and Mee Mee. He gets caught by the girls, who force him to take part in their activities.

To prevent himself from being taken away by aliens for experimentation, Dexter tricks Dee Dee into going instead, but he regrets his decision after realizing how much he cares for her.

To fix their apartment's plumbing, Krunk and Valhallen go to the basement, where they meet Ratman, a diminutive vigilante raised by rats (a parody of Batman).

Dexter's lab is threatened with repossession unless he can repay his debt to NASA. When Dee Dee wins the same amount in a lottery, he decides to steal her money out of desperation.

Major Glory, Krunk, and Valhallen try to rid their apartment of a bee.

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.

Dee Dee inflates Dexter's hydro-plasmatic suit and constantly floats in the air, prompting Dexter to bring her down.

After fellow Justice Friend White Tiger helps Valhallen stop a super-villain, the latter invites him to spend the night in his apartment, forgetting that Major Glory is allergic to cats.

Not interested in hearing Dee Dee's long-winded story, Dexter gives her a silencing formula to keep her quiet, but it instead turns her into a giant monster still bent on telling her story. When he realizes that nothing can make her quiet, he becomes a giant monster himself.

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.

Dexter and two friends go to the Star Check Convention, but certain confusion might send them to a different one.

To avoid the bath, Dexter decides to laminate himself.

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 newest creation gives Mom super powers.

Dexter's robot takes over his lab.

Dexter heals a turtle by giving him loads of modern, techno stuff.

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.

Dee Dee, who's not exactly good at singing, gets Dexter's help on getting a better voice, but not the voice Dexter was expecting.

When Dexter's favorite show gets interrupted by an emergency, he searches all town trying to find it and solve so regular broadcast returns.

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 must stop Dad from eating Mom's muffins.

Dexter finds out he's ugly, so he transforms his face to look better for the school photo.

Dexter combines himself with bubble gum to become more stretchable.

Dexter is send to detention after a confusion during a test.

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

A new female villian named Peltra wants Monkey's Coat.

Dee Dee, LeeLee and MeeMee become crimefighters, but of course they will not actually fight crime.

Dad wants to show Dexter the joy of sports.

Koosy tells Dee Dee that he is the king of the land of Koos, but when Dee Dee goes there...

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

Surprised of the results coffee causes on Mom and Dad, Dexter and Dee Dee decide to try it themselves.

Dexter uses his science to turn Dee Dee into a horse.

Dexter overloads the energy of the laboratory, so he makes numerous tries to reload it.

After Dexter did something really bad at school, he gets her mother called, so to not ruin his reputation, he turns Dee Dee into Mom.

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

On his way home, Dexter gets followed by a labrador, when he teaches him to speak, the dog becomes even more annoying.

A confusion at the supermarket makes Dexter go home with a different, yet extremely scientific, family; but who is home with his real family?

Dexter is afraid of taking a dive at the pool because Dad always pushes him.

After Dexter eats a giant burrito he believes he's going to die, so he makes a list of everything he must do before that time comes. (Including, make Mom and Dad happy, do dishes, free Robots, make World Peace, end World's hunger, learn to dance, make Dee Dee happy, shut down the Main System... and tell Mom and Dad about the secret laboratory).

Dexter and Mandark must team up in order to save the Earth from a meteor rain.

After an I.Q. test defines Dexter as ""average"", he decides to live an average life hanging out with an average boy of last name Smith.

Dexter and Mandark mechanize the giant figures of Lincoln and Washington from the Mount Rushmore statues and wreak havoc with them.

Dexter creates a small bug that eats all the scrap metal caused by Dee Dee's destruction.

Dexter's untested formula causes all plants in the garden to become dangerous.

After Dexter returns a bunny to a little girl with big round eyes, she starts following Dexter everywhere.

After Dexter ""fires"" Dee Dee, he realizes that his lab needs chaos.

Dexter travels to the past to meet the caveman that discovered fire.

Dexter attempts to make numerous accidents to get super powers.

Dexter goes to Mars to find alien life forms.

Dee Dee and the Ninja Clan battle for who delivers the newspapers in the neighborhood.

After Dexter and Dee Dee destroy Dad's bowling trophy, they are sent to each other's room.

Dee Dee builds a treehouse in the garden and Dexter can't stop wondering what's up there.

Dexter worked all night on his inventions so all he wants is some sleep, but Dee Dee will make sure that that doesn't happen.

Dexter and his friends Lucky and Pierre(¿?) are victims of a bully that hates kids with funny accents.

Numerous factors like getting up early, being the first ones there, fishing clothes and other accesories, will not allow Dexter and his Dad to go on a fishing trip.

Constant interruptions by Dexter, Dee Dee and Mom will not let Dad watch his golf game.

After Dexter breaks his glasses, he starts a new fashion at school.

Dexter meets a bum at an appliance store with a strange device on his head.

Dexter goes to the appliance store to buy a lightbulb for his lab.

Dexter takes piano classes from a man that looks a lot like Paul Williams.

When an electricist comes to repair the house, Dexter discovers that if he repairs the lab it will function perfectly.

Dexter creates a belt that can have its wearer do everything backwards, only to get in trouble when Dee Dee manages to get control of the time directional switch.

Dee Dee keeps getting into Dexter's lab even though Dexter keeps throwing her out.

Mandark tries to impress Dee Dee by getting into a surfing contest.

Dexter makes Dee Dee a robot for herself, at the same time a volcano is going to burst on an island in the middle of the ocean.

Dexter must save his family after they get possesed by aliens.

Dee Dee must save Dexter who is a slave in a distant galaxy.

Dee Dee and Lalavava (Mandark's sister), compete on a ballet contest.

It's Mother's Day and Mom can't take that Dad, Dee Dee and Dexter do all the housework.

Dexter and Dee Dee compete in various games chosen by Dexter.

A documentary shows the secret lives of Dexter and Dee Dee, also known as Blackfoot and Slim.

Dexter stays at school too much, forcing the janitor to stay as well, so he waits for a day in which Dexter has to leave early for an emergency, as he plans his revenge...

Dexter must stop his mechanical parrot before his imitations reveal the secret of his lab.

Dexter and Computress team up in order to shrink Mandark's head.

Krunk gets a nacho stuck in his tooth and Mayor Glory wants to take it out himself while Valhallens insists on taking Krunk to the dentist.

Dexter must prove to Dee Dee that Santa Claus doesn't exist.

When Blue Falcon appears with a destroyed Dynomutt, Dexter decides to build a new one.

The story of how Dexter was born and how he built his lab, in the style of a musical.

Dexter must save Japan from being destroyed by a monster, but his robot must be controlled by four people to function correctly, so Dexter must tell Dee Dee... and his parents.

Dexter creates a device to keep his clothes clean.

Dad decides to give the car a retouch.

After a failed mutation experiment, Dexter becomes Dee Dee's foot.

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

Quackor returns to battle Monkey in Dexter's Lab.

Mandark disguises as Mom in order to get into Dexter's Lab.

Because of his exceptional grades Dexter's school and parents have decided that he can go to college. At first Dexter is happy to be there so he can fill his mind with college knowledge, but in the end the students influence on Dexter allows him to do college pranks sending him a one way ticket back to Huber Elementary School.

Dexter creates a device taht doesn't work the way he wanted.

Dexter's mom takes him to his grandpa's house. At first he thinks it's going to be a boring day until he discovers that his grandpa has a secret lab!

It's career day and Dexter is ashamed of his Dad so he creates a Dad that looks more like him.

Mom spends a day at the supermarket.

Dexter travels to the moon and finds aliens that are planning to come to Earth to take everything.

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

Mandark plans another scheme to get rid of Dexter.

Tired of missing his favorite TV shows because of studying, Dexter creates a special helmet that absorbs all the TV info.

How did a young child called Susan became the being now known as Mandark? Born to free spirits, and with a passionate determination to harness the forces of science for his own ends, this is his story...

Two robots escape from Dexter's lab in order to have a better life.

Mandark gets in Dexters computer raving havok, so Dexter must stop him.

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

A girl accidentally takes Dexter's lunchbox, so Dexter and his friend must go into the girls bathroom to get it.

Dexter's Magic Uncle Ferger 'O Reiley pays a visit.

Dexter is trying to build his lab blue, but Dee Dee keeps making it pink.

Dexter creates a magnetic field to keep Dee Dee away from him.

Dexter creates a special device that lets him create his own life-like superhero comic... along with his sister villian ""Deestructa"".

Dad goes with the kids to play some golf.

Dexter creates the ultimate robot (RoboDexo 3000) to replace his previous 200 model.

Mom and Dad recall the moments that got them together.

Mom and Dad are having a discussion while playing scrabble, a discussion that Dexter and Dee Dee don't interpretate the right way.

The U.S. army invades Dexter's lab and Dexter fights them, each side thinking the other is a troop of aliens.

Dexter uses his newest creation to turn Dee Dee into a boy, but the male version of Dee Dee (Doo Dee) is not as cool as Dexter it would.

While Mom, Dexter and Dee Dee are out shopping, Dad decides to spend the afternoon dancing... like Tom Cruise in Risky Business.

Dexter must pass a physical bar exam if he wants to pass P.E.

Dexter and Koosy must save Peepers, otherwise the whole land of Koz will disappear.

Dexter and his family are kidnapped by aliens, Dexter leads his family in an escape attempt, but when Dexter is captured once more, Mom, Dad, and Dee-Dee attempt to save him.

Dexter and Dad watch a late night horror movie and spend a scary night in their house.

Both Dexter and Mandark's fathers intercede during another of Dexter and Mandark's petty squabbles, but their effort to get along with one another backfire, and the two also soon engage in a heated fight.

Dee-Dee has a new boyfriend who also likes science and Einstein, and soon the boy finds himself caught in a vicious tug of war...

Dexter is hit by a wrench while working on a device, and suffers amnesia, Dee Dee decides to mess with his head

Dexter and Mandark drill underground to expand their labs, but end up overlapping each other's work. They secretly devise a plan to destroy each other.

Dee Dee accidentally breaks down Dexter's lab, and she tries to not and let him know its broken.

Dad wants cable really bad, so Dexter illegally pirates cable for him.

When Dexter becomes the head of a library, he inforces the rules really hard, driving everyone crazy.

Dee Dee learns a new game that can ""predict peoples futures"". She uses it on Dexter, and finds out that the game REALLY DOES predict peoples futures...

A Monster starts roaming Dexter's lab, although Dexter doesnt know its just Dee Dee, who ate an apple in a failed lab experiment.

Dexte'rs father begins to sleepwalk, and accidently stumbles into Dexter's Lab

Dexter accidentally shrinks his parents, and puts them into a model of there house. Although the house isnt completed, so Dexter must find a way to reverse it before they know the truth.

Dexter creates a new invention and wears it on his head. It suddenly becomes the latest fashion craze at Huber elementry.

Dexter and Dee Dee realise when they work together, they make a pretty good team.

Dee Dee has a song stuck in her head. Literally.

Dee Dee's stuffed animals come to life and roam the house. Dee Dee and Dexter must get them before Mom and Dad find out.

Dexter creates an ink in which lets him command them to do whatever he wants them to do. Although when Mandark gets a hold of it, Dexter is the one being the slave.

Decxter and Mandark are both outperformed by a new girl attending the school, jealous, they become allies to deal with her.

Mom thinks she should spend quality time and watch Dexter in his chess comatition. Although, she really embarasses Dexter while hes there...

Dad gets fired from his job, and has to do the same job Mom does. He realises it isnt as easy as it looks.

Dexter goes on a quest. His quest is to reach the bathroom before he explodes.

When Dexter realises the power of the potato, he redesigns his lab to work on it.

Dexter is tired of wearing glasses, so he uses laser surgery on his eyes to make him have 1/20 vision. Although, he learns than no human should be able to see THIS well...

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

Mandark drops technology and starts being more in touch with nature.

Dexter decides its better if him and Mandark work together, although in the end Dexter does all the work while Mandark does nothing

Dexter is tired of being short, since his old plan of growing himself didnt work, he decides to make everyone shorter than him.

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 Dee Dee accidentally chops off her pigtail, Dexter gives her some hair growth potion. Although when she uses it, her hair floods the entire house.

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

Dexter refuses to see that blonde's have more fun, so he dyes Dee Dee's hair to prove it.

Dexter finds out that all of Mandark's plans are taken from a comic book. This way, he can get ready.

Dexter and his dad enter a Golf tournament, with Dad eager to get his hands on the Trophy, but there is one problem: he is hopeless at Golf, so Dexter decides to help with a remote controlled Golf ball

Dexter, Monkey, The Justice Freinds, Dee-Dee, her imaginary freind Coosie, Mandark, his parents, and Dexter's Parents participate in a cross-country race

Monkey narrates a documentry of the future of Laboratories and sciences.

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. His nonstop scratching eventually does just that.

Dexters parents accidentally sell Dexter's latest invention, and it is bought by Mandark.

Dee Dee starts layin' down the Judo on Dexter, then Dexter learns how to fight back.

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

When Dee Dee sees an Ostrage at the Zoo, she wants one of her own as a pet.