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Series overview

Color Season Episodes Season Premiere Season Finale
Pilots 03 February 26, 1995 March 24, 1996
1 13 April 28, 1996 January 1, 1997
2 39 July 16, 1997 June 15, 1998
3 13 November 16, 2001 September 20, 2002
4 13 November 22, 2002 November 20, 2003
Specials 02 December 10, 1999 January 22, 2013

Pilots (1995–1996)

No. in
Series
No. in
Season
Episode Title Original air date
0a 01 Dexter's Laboratory February 26, 1995

Dexter and Dee Dee test his latest invention: a device that turns people into animals, which yields crazy results.

Note: Renamed "Changes" for all subsequent airings.

0b 02 The Big Sister March 10, 1996
When Dee Dee eats an experimental cookie of Dexter's design, she grows extremely tall and goes on a Godzilla-style rampage, leaving it up to Dexter to don his mecha-suit and bring her back.
0c 03 Old Man Dexter March 24, 1996
When Dexter attempts to accelerate his aging so he can stay up late to watch "The Late-Early Movie", Dee Dee sneaks into his lab again and causes Dexter to turn into a 95-year-old man, which has dire effects.

Season 1 (1996–1997)

No. in
Series
No. in
Season
Episode Title Directors Original air date
01 01 Deedeemensional Rob Renzetti
Genndy Tartakovsky
April 28, 1996
Magmanamus Paul Rudish
Genndy Tartakovsky
Maternal Combat Rob Renzetti
Genndy Tartakovsky
Deedeemensional: When Dexter falls victim to a terrifying creature brought forth by his latest invention, Dee Dee goes back in time one hour earlier to warn him, but Dexter proves to be hard to convince. Well, that is until he sees two Dee Dees.
Dial M for Monkey: Magmanamus: Monkey must defend a city from a giant lava creature, Magmanamus (Brad Garrett), who only wants the entire world to be quiet so he can get some sleep (for a few centuries). That episode is a parody of the Godzilla giant monster films made in Japan.
Maternal Combat: Dexter creates a Mom-Droid to do his mother's chores when she falls ill. However, Dee Dee gets hold of the remote to the robot and wreaks havoc. Dexter desperately creates another one to counter Dee Dee.
02 02 Dexter Dodgeball Craig McCracken
Genndy Tartakovsky
May 5, 1996
Rasslor Genndy Tartakovsky
Paul Rudish
Dexter's Assistant Rob Renzetti
Genndy Tartakovsky
Dexter Dodgeball: Dexter tries to excuse himself out of P.E. with a fake note, but the new coach does not accept it so Dexter is forced to play dodgeball and endure torment from three bullies.
Note: The word "Crap" (which is used in the original broadcast) was muted in some Cartoon Network and Boomerang reruns. However in recent showings, and on the DVD release, the episode remains uncensored.
Dial M for Monkey: Rasslor: Intergalactic wrestling champion Rasslor ("Macho Man" Randy Savage) comes to Earth looking for a new opponent, and challenges all of Earth's superheroes, if no one can beat him he will destroy the Earth. However, Rasslor refuses to wrestle Monkey due to his size. This also marks the first appearance of the Justice Friends.
Dexter's Assistant: In need of an assistant for the science fair, Dexter performs a brain transplant on Dee Dee to make her smart enough to fill the role. Unfortunately, with her new brain, Dee Dee turns out to be much smarter than Dexter, much to his chagrin.
03 03 Dexter's Rival Genndy Tartakovsky May 12, 1996
Simion Paul Rudish
Genndy Tartakovsky
Old Man Dexter Craig McCracken
Genndy Tartakovsky
Dexter's Rival: Mandark enrolls at Dexter's school, quickly overshadowing Dexter and forces him to shut down his lab to add more power to his own lab. Dexter and Dee Dee hatch a plan to get revenge on him.
Dial M for Monkey: Simion: An intelligent chimpanzee (Maurice LaMarche) tries to enlist Monkey in getting revenge on the humans who created him.

Old Man Dexter: When Dexter attempts to accelerate his aging so he can stay up late to watch "The Late-Early Movie", Dee Dee sneaks into his lab again and causes Dexter to turn into a 95-year-old man, which has dire effects.
Note: This originally aired on TNT on March 24, 1996 as a pilot episode.

04 04 Double Trouble Rob Renzetti
Genndy Tartakovsky
May 19, 1996
Barbequor Paul Rudish
Genndy Tartakovsky
Changes Genndy Tartakovsky
Double Trouble: In order to rid himself of Dee Dee, Dexter clones himself. However, Dee Dee, and her friends, Mee Mee and Lee Lee do the same several times, causing havoc.
Dial M for Monkey: Barbequor: Monkey's birthday is interrupted by Barbequor, a villain who wants to roast Earth for his next meal.
Changes: Dexter and Dee Dee test his latest invention: a device that turns people into animals, which yields crazy results.
Note: "Dial M for Monkey: Barbequor" was replaced with "Dexter's Lab: A Story" and "Changes" in subsequent airings.
05 05 Jurassic Pooch Craig McCracken
Genndy Tartakovsky
May 26, 1996
Orgon Grindor Paul Rudish
Genndy Tartakovsky
Dimwit Dexter Genndy Tartakovsky
Jurassic Pooch: Dexter uses his dog's brain and heart for a Tyrannosaurus rex, and Dee Dee makes him her pet, despite Dexter's efforts to convince her that its a dinosaur.
Dial M for Monkey: Orgon Grindor: A space creature with an Italian accent takes over Monkey's mind during his date with Agent Honeydew.
Dimwit Dexter: Dexter has a mental lapse due to brain exhaustion and acts idiotic, garnering the amusement of the neighborhood kids.
Note: This originally aired on TBS on April 14th, originally known as "Dumb Like Dee Dee".
06 06 Dee Dee's Room Genndy Tartakovsky June 2, 1996
Huntor Paul Rudish
Genndy Tartakovsky
The Big Sister Genndy Tartakovsky
Dee Dee's Room: To find his missing invention, Dexter dons a clean suit heads into the one place he fears most: Dee Dee's room.
Dial M for Monkey: Huntor: Monkey must fight for his life against a hunter on a jungle asteroid.
The Big Sister: When Dee Dee eats an experimental cookie of Dexter's design, she grows extremely tall and goes on a Godzilla-style rampage, leaving it up to Dexter to don his mecha-suit and bring her back.
07 07 Star Spangled Sidekicks Genndy Tartakovsky November 20, 1996
TV Super Pals Craig McCracken
Genndy Tartakovsky
Game Over Craig McCracken
Genndy Tartakovsky
Star Spangled Sidekicks: Dexter and Dee Dee enter tryouts to become Major Glory's sidekick, but they soon realize that fancy costumes are not the only requirement.
The Justice Friends: TV Super Pals: Krunk, Valhallen, and Major Glory have trouble deciding what to watch on TV.
Game Over: Dexter's dad buys a video game for the kids to play, but eventually Dexter gets trapped in the video game by a rogue computer program and it becomes up to Dee Dee to get him out. The episode is loosely based on Tron.
08 08 Babysitter Blues Craig McCracken
Rob Renzetti
November 27, 1996
Valhallen's Room Genndy Tartakovsky
Dream Machine Rob Renzetti
Genndy Tartakovsky
Babysitter Blues: Dexter tries everything to win the heart of his much older babysitter, even sabotaging her relationship with her boyfriend and accelerating his age, only to get knocked out by her boyfriend.
The Justice Friends: Valhallen's Room: When Valhallen loses his magic "axe" and starts to transform into a geek, Krunk and Major Glory venture into his room to find it.
Dream Machine: Dexter's nightmares become a problem, so he has Dee Dee operate a dream machine to fix the problem, but it soon turns out that Dee Dee is unreliable and he eventually gets the ultimate nightmare: Dee Dee being the "grandfather of all knowledge".
09 09 Doll House Drama Rob Renzetti December 4, 1996
Krunk’s Date Genndy Tartakovsky
The Big Cheese Genndy Tartakovsky
Doll House Drama: After Dexter shrinks himself to doll size, he becomes an unwilling character in Dee Dee's doll story. Due to a side effect of shrinking, he starts to confuse fantasy with reality, and starts to believe the story is real.
The Justice Friends: Krunk's Date: Krunk gets a crush on She-Thing.
The Big Cheese: Dexter invents a device in order to learn French in his sleep, but when the record skips and repeats a single phrase all night long, he wakes up to finds that he can only say "Omelette Au Fromage" (Omelette du fromage) (which roughly translates to "cheese omelet"). This strangely makes Dexter something of a celebrity, until he is faced with his laboratory's explosive security measures.
10 10 Way of the Dee Dee Paul Rudish
Genndy Tartakovsky
December 11, 1996
Say Uncle Sam Genndy Tartakovsky
Tribe Called Girl Genndy Tartakovsky
Way of the Dee Dee: After Dee Dee talks about Dexter's lonely lifestyle, he asks her to teach him her ways, only to become more like Dee Dee than he had estimated.
The Justice Friends: Say Uncle Sam: Major Glory's uncle, Sam, is about to pay a visit, but the apartment is in no shape for company.
Tribe Called Girl: Wanting to learn more about girls, Dexter spies on Dee Dee and her friends, Mee Mee and Lee Lee during a sleepover. Unfortunately, the girls catch him spying on them and make him participate in their activities.
11 11 Space Case Rob Renzetti
Genndy Tartakovsky
December 18, 1996
Ratman Genndy Tartakovsky
Dexter's Debt Genndy Tartakovsky
Space Case: To get rid of some aliens, Dexter offers Dee Dee as a test subject tricking her into thinking they're going to Candy Land, but soon begins to realize how much he loves his sister.
The Justice Friends: Ratman: While trying to fix the furnace, the Justice Friends find Ratman living in their basement.
Dexter's Debt: Dexter's lab is threatened with repossession when he receives a $200,000,000 bill from NASA, while Dee Dee wins the same amount in a lottery, starting a conflict of conscience within Dexter.
12 12 Dexter's Rival Genndy Tartakovsky December 25, 1996
Bee Where? Paul Rudish
Genndy Tartakovsky
Mandarker Genndy Tartakovsky
Dexter's Rival: See the Episode 3a.
The Justice Friends: Bee Where?: Major Glory is unnerved by a bee in the apartment.
Mandarker: Following the destruction of his lab by Dexter and Dee Dee, Mandark returns to get revenge and turns to magic to beat Dexter in the science fair.
13 13 Inflata Dee Dee Genndy Tartakovsky January 1, 1997
Can't Nap Genndy Tartakovsky
Monstory Rob Renzetti
Genndy Tartakovsky
Inflata Dee Dee: Dee Dee tries on Dexter's inflatable suit and is swept away on the wind, leaving it up to Dexter to save her.
The Justice Friends: Can't Nap: Valhallen invites White Tiger to the apartment, forgetting that Major Glory is allergic to cats.
Monstory: Hoping to silence Dee Dee so he won't have to hear her story, Dexter gives her a silencing potion. However, he grabs the wrong vial and turns her into a monster by mistake. As the effects worsen, Dexter turns to drastic measures to subdue her. As when he does that, they look like giant monsters battling each other and destroying the city with some Godzilla-style giant monster rampages and battles. This is a spoof of the Kaiju films made in Japan.

Season 2 (1997–1998)

No. in
Series
No. in
Season
Episode Title Directors Original air date
14 01 Beard to Be Feared Genndy Tartakovsky July 16, 1997
Quackor the Fowl
Ant Pants
The Beard to Be Feared: 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.
Quackor the Fowl: 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.
Ant Pants: Dexter prevents Dee Dee from destroying some ants. In order to teach her about ants, Dexter and Dee Dee enter Dexter's ant farm, only to see that the ants are a little too civilized for their taste.
15 02 Mom and Jerry Robert Alvarez July 23, 1997
Chubby Cheese Rob Renzetti
That Crazy Robot
Mom and Jerry: Dexter accidentally switches his brain with a mouse, and must avoid his mother when she decides to exterminate him. As the title suggests, this short parodies classic cat & mouse animated subjects such as Tom and Jerry.
Chubby Cheese: 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.
That Crazy Robot: One of Dexter's robot inventions 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 Dee Dee or scolds her, even her friends, her mother, and Dexter himself.
16 03 D & DD Genndy Tartakovsky July 30, 1997
Hamhocks and Armlocks Rob Renzetti
Genndy Tartakovsky
D & DD: When Dexter's friends become tired of the complicated traps he sets up as Lab Master while playing a board game, they put Dee Dee in charge for a change of pace.
Hamhocks and Armlocks: Dexter's father gets challenged to an arm-wrestling match against a local champion, Earl, at a truck stop which the family car breaks down nearby. Upon seeing Earl's determination to fight their father, Dexter attaches a robotic arm to his body to ensure he wins.
17 04 The Koos Is Loose Genndy Tartakovsky August 6, 1997
Morning Stretch Robert Alvarez
Hunger Strikes Rob Renzetti
The Koos Is Loose: Dee Dee's imaginary friend, Koosalagoopagoop (voiced by Dom DeLuise), comes to life and annoys Dexter. Koosalagoopagoop later appears in another episode in the series and makes a cameo appearance in The Powerpuff Girls episode "Imaginary Fiend".
Morning Stretch: Dexter oversleeps after a late-night work at the lab, waking up one minute before his school bus comes, leaving him no time to finish his homework and get ready for school, so he makes a helmet which turns 30 seconds into 30 minutes, unaware that the school is closed due to a snowdown.
Hunger Strikes: Dexter uses radiation therapy so he can like vegetables, but with a severe side-effect which turns him into an Incredible Hulk-like character if he goes too long without them.
18 05 Dee Dee Locks and the Loch Ness Monster Robert Alvarez
Genndy Tartakovsky
August 13, 1997
Backfire Rob Renzetti
Book′Em Robert Alvarez
Dee Dee Locks and the Loch Ness Monster: Dexter's mother approaches Dexter to read a bedtime story to Dee Dee when she's sick, but she makes up her own story after being bored by Dexter's story.
Backfire: Dexter fuses Dee Dee with the family car by accident, causing mayhem.
Book'Em: Dexter and Dee Dee must return a library book which Dexter forgot to check out.
19 06 Sister's Got a Brand New Bag Genndy Tartakovsky August 20, 1997
Shoo, Shoe Gnomes Rob Renzetti
Lab of the Lost Genndy Tartakovsky
Sister's Got a Brand New Bag: Dee Dee's new dance moves annoys Dexter to no end.
Shoo, Shoe Gnomes: Dexter calls upon the "shoe gnomes" to repair his shoes, but cannot rid himself of them afterwards.
Lab of the Lost: Following a mishap in his lab, Dexter ends up ends up in the old, long-abandoned part of the lab, and discovers his early inventions, which are unhappy to see him as he had neglected them.
20 07 Labels Rob Renzetti August 27, 1997
Game Show Robert Alvarez
Fantastic Boyage
Labels: Dee Dee starts to take anything that belongs to Dexter, claiming that it "doesn't have his name on it." He invents a label-making gun to make sure his things do.
Game Show: Dexter and Dee Dee compete against each other on a game show.
Fantastic Boyage: Dexter tries to inject himself into Dee Dee to find a cure to the common cold, but ends up inside his dog subsequently believing Dee Dee has been infected with a dog virus.
21 08 Filet of Soul Genndy Tartakovsky September 3, 1997
Golden Diskette
Filet of Soul: Dexter and Dee Dee do not want to give their dead goldfish a proper burial, but are haunted by him when they do not.
Golden Diskette: Dee Dee finds a "golden diskette" allowing her and Dexter to enter Professor Hawk's computer factory. Dee Dee's behavior in the factory frees Professor Hawk from his robotic body.
22 09 Snowdown Robert Alvarez
Genndy Tartakovsky
September 10, 1997
Figure Not Included Rob Renzetti
Mock 5 Rob Renzetti
Genndy Tartakovsky
Snowdown: When Dee Dee's snowball skills outclass Dexter, their father trains him to be the snowball terror he was at their age. It soon turns out that Dee Dee was trained by their mother, who was a bigger snowball terror than her husband.
Figure Not Included: Dexter cannot join his local Major Glory gang because he does not have an action figure, so he makes his own. He then learns an important lesson about how his friends should treat him.
Mock 5: To race in the "Annual Soapbox Derby down Volcano Mountain", Dexter and his father build the "Mock 5". The episode is a parody of Speed Racer.
23 10 Ewww That's Growth Rob Renzetti September 17, 1997
Nuclear Confusion Robert Alvarez
Germ Warfare Robert Alvarez
Genndy Tartakovsky
Ewww That's Growth: Tired of his small stature after he cannot get on a rollercoaster, Dexter makes himself taller.
Nuclear Confusion: Dee Dee hides the power core to Dexter's nuclear powered lamp, and he must decipher her clues within 40 minutes after which it would explode, destroying the earth along with it.
Germ Warfare: A very sick Dee Dee gets her germs all over Dexter's lab.
24 11 A Hard Day's Day Rob Renzetti September 24, 1997
Road Rash
Ocean Commotion
A Hard Day's Day: Dexter needs to find a way to move the moon, which is blocking Saturn and its "science waves" (which is what makes it a "good day for science"). Unfortunately he brings the moon to the earth, destroying his lab.
Road Rash: Dexter's parents get him a bike for exercise, but he's unable to catch Dee Dee on her inline skates. This episode parodies the Wile E. Coyote and Road Runner cartoons, with Dexter trying similar techniques as Wile E. Coyote in capturing Dee Dee, and at one point Dee Dee imitating the Roadrunner with the trademark "Meep-meep!"
Ocean Commotion: Dexter's family goes to the beach, where Dexter tries to communicate with whales, and Dee Dee (dressed as a mermaid) is captured by manic pirates.
25 12 The Bus Boy Rob Renzetti
Genndy Tartakovsky
October 1, 1997
Things That Go Bonk in the Night Genndy Tartakovsky
Ol' McDexter Robert Alvarez
Genndy Tartakovsky
The Bus Boy: A couple of girls push one of Dexter's pencils into the back of the school bus. Dexter goes to retrieve it; however, a legend says that no one has ever returned from the back of the bus, and Dexter has to find ways to "rescue" himself.
The Justice Friends: Things That Go Bonk in the Night: After a Puppet Pals marathon, Krunk dreams the Puppet Pals are attacking puppet versions of Major Glory and Valhallen.
Ol' McDexter: Dexter becomes disappointed when he ends up at an Amish farm instead of the high-tech farm for summer camp. His subsequent attempts to modernize the Amish family do not fall down well with them.
26 13 Sassy Come Home Genndy Tartakovsky October 8, 1997
Photo Finish Robert Alvarez
Genndy Tartakovsky
Sassy Come Home: Dexter hunts for Sasquatch, who befriends Dee Dee because of her similarly huge feet.
Photo Finish: Dee Dee photographs Dexter's lab, and Dexter has to get the film back before his mother sees the pictures of his lab.
27 14 Star Check Unconventional Rob Renzetti October 15, 1997
Dexter Is Dirty Genndy Tartakovsky
Ice Cream Scream Robert Alvarez
Star Check Unconventional: Dexter and his friends try to escape a Darbie doll convention where they arrived because they weren't paying attention to were they were going, while dressed as "Star Check" characters, a parody of Star Trek.
Dexter Is Dirty: Tired of bathing, Dexter laminates himself to keep himself clean.
Ice Cream Scream: Dexter cannot get the ice cream truck to stop for him following an incident where he paid for his ice-cream in pennies to the driver.
28 15 Decode of Honor Robert Alvarez
Genndy Tartakovsky
October 22, 1997
World's Greatest Mom Rob Renzetti
Ultrajerk 2000 Robert Alvarez
Decode of Honor: Dexter and Dee Dee's secret decoder rings hold the keys to joining the Action Hanks and Pony Puff fan clubs but the clues don't seem right.
World's Greatest Mom: Dexter accidentally gives his mother super powers, when she is hit with a ray of energy. She doesn't even notice she has superpowers, but acts like a superhero.
Ultrajerk 2000: Dexter designs a new robot Ultramark 2000 to help him with his laboratory. Unfortunately, it ends up controlling his lab, so Dexter must find a way to destroy it.
29 16 Techno Turtle Rob Renzetti October 29, 1997
Surprise! Robert Alvarez
Got Your Goat Robert Alvarez
Genndy Tartakovsky
Techno Turtle: Dexter rebuilds an injured turtle Dee Dee befriends.
Surprise!: In order to see his birthday presents, Dexter turns himself invisible.
Got Your Goat: Dexter and Dee Dee go to South America to catch the legendary chupacabra, which is actually one of Dexter's experiments. He tries to remember what he created it for.
30 17 Dee Dee Be Deep Genndy Tartakovsky November 5, 1997
911 Rob Renzetti
Genndy Tartakovsky
Down in the Dumps Robert Alvarez
Dee Dee Be Deep: Dee Dee's voice becomes a booming baritone after Dexter attempts to "improve" her singing.
911: When an Action Hank episode is interrupted by the Emergency Broadcast System, Dexter travels around the world to solve the problem.
Down in the Dumps: Dee Dee's favorite teddy bear gets sent to the Garbage dump. Dexter and Dee Dee travel to the dump to get it back.
31 18 Unfortunate Cookie Robert Alvarez
Genndy Tartakovsky
November 12, 1997
The Muffin King Genndy Tartakovsky
Unfortunate Cookie: Dexter and Dee Dee are stuck together by a Chinese finger trap and must travel to Chinatown to free themselves. This proves difficult, due to their constant bickering.
The Muffin King: Dexter and Dee Dee have to keep their father away from their mother's freshly baked muffins while she is out shopping.
32 19 Picture Day Genndy Tartakovsky November 19, 1997
Now That's a Stretch
Dexter Detention Rob Renzetti
Picture Day: Dexter transforms his face so his school picture will look nice, by molding a handsome face out of wax.
Now That's a Stretch: Dexter makes himself stretchy using a machine to turn himself into bubble gum.
Dexter Detention: Dexter gets sent to detention after someone caused him to shout the answer to the first question of the test in annoyance. When Dexter tries to escape the detention room, he ends up in the State Prison.
33 20 Don't Be a Baby Robert Alvarez
Genndy Tartakovsky
November 26, 1997
Peltra Genndy Tartakovsky
G.I.R.L. Squad Rumen Petkov
Don't Be a Baby: Dexter tries to make himself and Dee Dee older in order to see an R-rated movie, but, due to an accidental mishap by Dee Dee, makes everybody (except for Dexter and Dee Dee) babies instead.
Dial M for Monkey: Peltra: Peltra wants to turn Monkey into a fur coat.
G.I.R.L. Squad: After a crime prevention talk at school, Dee Dee and her friends become crime fighters.
34 21 Sports a Poppin' Rob Renzetti
Genndy Tartakovsky
December 3, 1997
Koosalagoopagoop Genndy Tartakovsky
Project Dee Dee Robert Alvarez
Sports a Poppin: Dexter's father wants to teach Dexter some sports, but it soon turns out that Dexter is not athletic, forcing his father to give up.
Koosalagoopagoop: Dee Dee enters the land of her imaginary friend Koosalagoopagoop after he lies to her that he is the king of his land. This is the second and final appearance of Koosalagoopagoop in the series. This is the first segment where Dexter doesn't appear at all.
Project Dee Dee: When Dexter learns that Dee Dee is trying to make a science project alone she wants to help her, but she doesn't want his help. She ends up getting Dexter's help, but propels the entire school into space.
35 22 Topped Off Genndy Tartakovsky January 14, 1998
Dee Dee's Tail Rumen Petkov
No Power Trip
Topped Off: Dexter and Dee Dee try coffee after seeing how it energizes their parents and become addicted to it.
Dee Dee's Tail: Dee Dee complains that she wants to be a Pony Puff Princess, so Dexter turns her into a horse. But Dexter and Dee Dee's friends try to take advantage of her.
No Power Trip: Despite warnings from the computer, Dexter consumes too much power while performing numerous experiments, causing his lab to shut down. He then tries numerous methods to restore power to his lab.
36 23 Sister Mom Rob Renzetti
Genndy Tartakovsky
January 21, 1998
The Laughing Robert Alvarez
Genndy Tartakovsky
Sister Mom: Dexter is afraid to bring his mother to see his principal, so he disguises Dee Dee as her.
The Laughing: Dexter is bitten by a clown's dentures, causing him to turn into a clown every night like a werewolf. Now Dee Dee must use the power of mime to stop him and get him back to normal.
37 24 Coupon for Craziness John McIntyre January 28, 1998
Better Off Wet Rumen Petkov
Dexter's Lab: A Story Genndy Tartakovsky
Coupon for Craziness: Dexter gets accidentally switched with an average hyperactive child who has scientist parents; neither couple notices.
Better Off Wet: Dexter tries to avoid being pushed into the family's new swimming pool by his father.
Dexter's Lab: A Story: Dexter adopts a Labrador Retriever and gives him a way to speak human language.
38 25 Critical Gas Rumen Petkov February 4, 1998
Let's Save the World You Jerk! John McIntyre
Average Joe Rumen Petkov
Critical Gas: 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. Therefore, he sets about doing things he usually doesn't do before he "dies", such as being nice to Dee Dee and giving her unrestricted access to his lab. He even decides to reveal about his lab to his parents, but just as he is about to do so, just when the 30 minutes are up, he does not "die", but farts so loudly that it smashes the TV behind him and can be heard all over the world.
Let's Save the World You Jerk!: Dexter has to team up with Mandark to prevent asteroids from destroying Earth. They fail due to their arguing, and the asteroids destroy the Earth anyway. Dexter and Mandark continue to fight.
Average Joe: An intelligence test grades Dexter as average, which makes him upset. As a result, he shuts down his lab and tries to live life like a normal kid.
39 26 Rushmore Rumble Genndy Tartakovsky February 11, 1998
A Boy and His Bug John McIntyre
You Vegetabelieve It! Rumen Petkov
Rushmore Rumble: Dexter and Mandark bring the Abraham Lincoln and George Washington faces on Mount Rushmore to life and make them fight each other.
A Boy and His Bug: When Dexter neglects his pet bug, which he created to devour the things metal that Dee Dee destroys, it begins eating his lab.
You Vegetabelieve It!: Dexter's growth formula causes the plants in the garden to grow to enormous size.
40 27 Aye Aye Eyes Genndy Tartakovsky February 18, 1998
Dee Dee and the Man John McIntyre
Genndy Tartakovsky
Aye Aye Eyes: A little girl with big eyes falls in love with Dexter and follows him everywhere after he returns a toy she dropped.
Dee Dee and the Man: Dexter "fires" Dee Dee, only to realize that the chaos she causes has been helping him concentrate.
41 28 Old Flame Genndy Tartakovsky February 25, 1998
Don't Be a Hero Rumen Petkov
My Favorite Martian John McIntyre
Old Flame: Dexter brings the caveman who first discovered fire back from the past.
Don't Be a Hero: Dexter tries to turn himself into a superhero, but discovers that hero work is not all it's cracked up to be. He gives up after every power he tries backfires.
My Favorite Martian: Dexter travels to Mars to find intelligent life, unaware that Dee Dee has stowed away in his space capsule. After Dee Dee gets covered in red dirt, Dexter thinks she is a real life Martian.
42 29 Paper Route Bout John McIntyre March 4, 1998
The Old Switcharooms
Trick or Treehouse Rumen Petkov
Paper Route Bout: Dee Dee's newspaper route is threatened by a team of rogue bicyclists (dressed as ninjas) who cause trouble. This is the second segment where Dexter doesn't appear at all.
The Old Switcharooms: Dexter's father makes him and Dee Dee switch each other's rooms as a punishment for running into him (causing his bowling trophy to break). Dexter believes that Dee Dee is destroying his lab and decides to get revenge by destroying her room. After seeing that Dee Dee did nothing but sleep on his bed, Dexter is punished for destroying her room and goes to the Doghouse and the family dog goes to Dexter's Lab but the dog ends up destroying his lab.
Trick or Treehouse: Dee Dee builds a treehouse and won't let Dexter inside to spite him for all the times he kicked her out of his lab; however, everyone but Dexter is allowed in.
43 30 Quiet Riot John McIntyre March 11, 1998
Accent You Hate Rumen Petkov
Catch of the Day Rumen Petkov
Genndy Tartakovsky
Quiet Riot: Dexter tries to get some sleep, which is complicated by Dee Dee's counterproductive attempts to make sure he has peace and quiet.
Accent You Hate: A school bully picks on Dexter and his friends because of the way they talk.
Catch of the Day: Dexter's father tries to get himself and Dexter to his fishing spot before the sun comes up and anybody else gets there. If someone gets there first, they have to try again the next day.
44 31 Dad Is Disturbed John McIntyre March 18, 1998
Framed Genndy Tartakovsky
That's Using Your Head John McIntyre
Dad Is Disturbed: Dexter's father tries to watch a golf tournament. But he is constantly distracted by his family. Barney Rubble and Betty Rubble from The Flintstones make an appearance.
Framed: When Dexter's glasses break, he creates a new trend: cracked glasses.
That's Using Your Head: Dexter thinks a crazy homeless person wearing a metal hat really can communicate with aliens, so he takes the man to his lab to improve the reception of his hat.
45 32 DiM Genndy Tartakovsky March 25, 1998
Just an Old Fashioned Lab Song John McIntyre
Repairanoid Rumen Petkov
DiM: Dexter deals with the annoyances of the hardware superstore to get a light bulb. The episode is notable for containing almost no dialog except for the final punch line.
Just an Old Fashioned Lab Song...: Dexter takes piano lessons from "Professor Williams" and gradually Dexter discovers he has more musical aptitude than he thought after Professor Williams discovers his lab. Guest starring Paul Williams as Professor Williams.
Repairanoid: Dexter enlists the aid of an electrical repairman to improve the electrics in the lab. But the overall electric bill turns out to be very high.
46 33 SDRAWKCAB John McIntyre April 1, 1998
The Continuum of Cartoon Fools Rumen Petkov
Genndy Tartakovsky
Sun, Surf, and Science
SDRAWKCAB: Dexter invents a belt that makes its wearer do everything backwards, but Dee Dee gets her hands on the directional switch. The episode runs backwards, with the conclusion first and the title card SDRAWKCAB (actually a mirror image of BACKWARDS) last.
The Continuum of Cartoon Fools: Dexter tries to figure out how Dee Dee keeps getting into his lab every time he sends Dee Dee out of one entrance and seals it. Finally, Dee Dee reveals that she entered through the secret book-case entrance, so Dexter seals that too, but later realizes that he can no longer enter his lab.
Sun, Surf, and Science: Mandark enters a surfing contest to win Dee Dee's heart from another surfer. This is the third segment where Dexter doesn't appear at all and the only segment where Mandark is the protagonist.
47 34 Big Bots Rumen Petkov
Genndy Tartakovsky
April 8, 1998
Gooey Aliens That Control Your Mind
Misplaced in Space Genndy Tartakovsky
Big Bots: Dexter and Dee Dee, using their giant robots, try to save an island's population from being destroyed by a volcano.
Gooey Aliens That Control Your Mind: Dexter's parents and sister Dee Dee have their minds taken over by an alien life form that escaped Dexter's lab.
Misplaced in Space: A teleporter malfunction sends Dexter to an alien prison and Dee Dee goes on a mission to save Dexter.
48 35 Dee Dee's Rival Rumen Petkov
Genndy Tartakovsky
April 15, 1998
Slightly Psycho John McIntyre
Genndy Tartakovsky
Game for a Game Rumen Petkov
Dee Dee's Rival: Mandark's sister, Olga Astronomonov (a.k.a. Lalavava), tries to upstage Dee Dee at dance school.
Slightly Psycho: It's Mother's Day, but Dexter's mother cannot find her trademark gloves and her family teases her by doing a very poor job trying to clean the house.
Game for a Game: Dee Dee claims she can beat Dexter in any game, but fails to realize that Dexter can think up very confusing games.
49 36 Blackfoot and Slim John McIntyre April 22, 1998
Trapped with a Vengeance Genndy Tartakovsky
The Parrot Trap Rumen Petkov
Genndy Tartakovsky
Blackfoot and Slim: A nature documentary team observes "Blackfoot" (Dexter) and "Slim" (Dee Dee) in their "natural habitat".
Trapped with a Vengeance: The school janitor plans revenge on Dexter for making him stay late every night until Dexter leaves.
The Parrot Trap: Dexter has to keep his robot parrot from telling his parents about his lab.
50 37 Dexter and Computress Get Mandark! John McIntyre April 29, 1998
Pain in the Mouth Genndy Tartakovsky
Dexter Vs. Santa's Claws Rumen Petkov
Genndy Tartakovsky
Dexter and Computress Get Mandark!: Written and narrated by a six-and-a-half-year-old boy who sent a tape containing the episode's audio to Cartoon Network, the story follows Dexter and Mandark's robot "brother" Computress teaming up to make Mandark's head shrink.
The Justice Friends: Pain in the Mouth: Krunk gets a tortilla chip stuck in his tooth, and Major Glory decides to fix it by pulling the tooth out himself.
Dexter Vs. Santa's Claws: Dexter tries to prove to Dee Dee that "Santa" is really just their father in disguise but is actually wrong.
51 38 Dyno-Might Genndy Tartakovsky May 6, 1998
LABretto
Dyno-Might: Blue Falcon asks Dexter to fix Dynomutt, but Dexter instead builds a new Dynomutt that does everything wrong.
LABretto: In this musical episode, Dexter's life is shown in opera form.
52 39 Last But Not Beast Genndy Tartakovsky May 15, 1998

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 entire family in order to defeat it. This episode features the casts of The Justice Friends and Dial M for Monkey in battle against the monster. In this episode, Dexter finally reveals about his lab to his parents in order to get their help, but he erases it from their memories after defeating the monster. He also finds out that his lab monkey is a superhero, but Monkey erases this from his memory including the whole battle against the monster at the end of the episode. Mandark believes that he defeated the monster which upsets Dexter. Only Dee Dee and Monkey know what really happened.

Note 1: The title is a play on the phrase, "last but not least", indicating this was intended to be the series finale, until the series revived in 2001 for a third season.

Note 2: This episode spoofing anime, Voltron, the Super Sentai/Power Rangers genre and kaiju films (primarily Godzilla or Gamera), it is also the series' first full episode-length story with a huge reference to Japanese popular culture and Japanese culture.

Season 3 (2001–2002)

No. in
Series
No. in
Season
Episode Title Directors Original air date
53 01 Streaky Clean Robert Alvarez
Chris Savino
November 16, 2001
A Dad Cartoon John McIntyre
Chris Savino
Sole Brother
Streaky Clean: Dexter creates a satellite to clean stains off of his clothes, but it goes horribly wrong when another satellite hits the satellite that Dexter created and the satellite becomes damaged, causing the fabric beneath each stain to be eliminated as well.
A Dad Cartoon: Dad decides to give the car a retouch, but keeps breaking things and saying he'll fix it later. After having enough, he pushes the car over a cliff, and below it are other crushed cars, meaning this wasn't the first time.
Sole Brother: Dexter accidentally becomes Dee Dee's foot when the two fuse together. Now they have to wait 24 hours to reverse the fusion.
54 02 Mind Over Chatter Robert Alvarez
Chris Savino
November 23, 2001
A Quackor Cartoon Chris Savino
Momdark John McIntyre
Chris Savino
Mind Over Chatter: Dexter accidentally gives himself telepathy that he cannot shut off when trying to overhear his father's thoughts to figure out what he got for his birthday, causing everyone to read his own mind.
A Quackor Cartoon: Quackor returns to battle Monkey in Dexter's Lab until Quackor lays an egg; then the two fall in love.
Momdark: Mandark disguises himself as Dexter's mom to get into Dexter's Lab. Unfortunately he has to deal with Dexter, Dad, and Dee Dee's requests.
55 03 Copping an Aptitude John McIntyre
Chris Savino
November 30, 2001
A Failed Lab Experiment Chris Savino
The Grand-Daddy of All Inventions John McIntyre
Chris Savino
Copping an Aptitude: Dexter's school and parents decide to send him to college. He ignores his fellow students, who prefers to "party now, study later", until his mind finally snaps from the workload.
A Failed Lab Experiment: When Dexter's new device, made to help him see through solid objects, fails to work as expected, he ends up seeing through people's clothes.
The Grand-Daddy of All Inventions: During a trip to his grandfather's house, Dexter learns that the outwardly boring old man has a lab just like his own.
56 04 Poppa Wheely John McIntyre
Chris Savino
January 18, 2002
A Mom Cartoon Chris Savino
The Mock Side of the Moon John McIntyre
Chris Savino
Poppa Wheely: It's career day and Dexter is ashamed of his father, so he creates a better father.
A Mom Cartoon: Dexter's mom fights another woman at the supermarket for some new latex gloves.
The Mock Side of the Moon: Dexter travels to the moon and finds that aliens are planning an invasion.
57 05 If Memory Serves Robert Alvarez
Chris Savino
February 22, 2002
A Mandark Cartoon Chris Savino
Tele Trauma John McIntyre
Chris Savino
If Memory Serves: To keep himself from forgetting anything important, Dexter uses a device to copy his memories.
A Mandark Cartoon: Mandark plans another scheme to get rid of Dexter. Everything in this cartoon is to the tune of Mandark's trademark laugh.
Tele Trauma: Since his studying is interrupting his favorite TV shows, Dexter creates a helmet to absorb the shows directly.
58 06 A Boy Named Sue John McIntyre
Chris Savino
March 29, 2002
Lab on the Run
A Boy Named Sue: Mandark's origin is revealed.
Lab on the Run: Two robots escape from Dexter's lab in order to have a better life, because if a robot makes even the tiniest mistake, Dexter turns them into cubes of steel.
59 07 Dos Boot Chris Savino June 7, 2002
A Dee Dee Cartoon Robert Alvarez
Chris Savino
Would You Like That in the Can John McIntyre
Chris Savino
Dos Boot: Mandark gets inside Dexter's computer system, so Dexter must follow him inside.
A Dee Dee Cartoon: Dee Dee goes and plays in her own "lab" after being kicked out of Dexter's.
Would You Like That in the Can: Dexter and his friend Douglas Mordecai must enter the girls bathroom to retrieve Dexter's lunchbox.
60 08 That Magic Moment John McIntyre
Chris Savino
June 14, 2002
A Silent Cartoon Chris Savino
Opposites Attract
That Magic Moment: Dexter's magician uncle pays a visit.
A Silent Cartoon: Dexter is trying to paint his lab blue, but Dee Dee wants to make it pink. (Spoof of Pink Panther cartoon The Pink Phink).
Opposites Attract: Dexter creates a magnetic field to keep Dee Dee away from him.
61 09 Comic Relief Chris Savino June 21, 2002
A Third Dad Cartoon
RoboDexo 3000 John McIntyre
Chris Savino
Comic Relief: Dexter creates a device to make a lifelike superhero comic, with his sister villain "Deestructa".
A Third Dad Cartoon: Dexter's father plays golf with his kids. (Spoof of Nickelodeon's Sports Cartoon shorts of the 1980s).
RoboDexo 3000: Dexter creates the ultimate robot to replace his previous model.
62 10 Glove at First Sight Robert Alvarez
Chris Savino
June 28, 2002
A Mom & Dad Cartoon Chris Savino
Smells Like Victory John McIntyre
Chris Savino
Glove at First Sight: Dexter's parents remember their first date and dance.
A Mom & Dad Cartoon: 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.
Smells Like Victory: The U.S. army invades Dexter's lab under the mistaken impression that aliens are using it as a base.
63 11 Oh, Brother? Chris Savino July 5, 2002
Another Dad Cartoon
Bar Exam John McIntyre
Chris Savino
Oh, Brother?: Dexter turns his sister into a boy, but is disappointed when "he" is not as cool as Dexter would like.
Another Dad Cartoon: With everyone out of the house, Dexter's father decides to spend the time dancing.
Bar Exam: Dexter must pass a physical exam if he wants to pass P.E. and move up a few grades.
64 12 Jeepers, Creepers, Where is Peepers? David Smith July 12, 2002
Go, Dexter Family, Go! John McIntyre
Chris Savino
Jeepers, Creepers, Where is Peepers?: Dexter and Koos must save Peepers to keep the land of Kooz from disappearing.
Go, Dexter Family, Go!: Dexter's family must rescue him from aliens.
65 13 Scare Tactics John McIntyre
Chris Savino
September 20, 2002
A Mom Cartoon Chris Savino
My Dad Vs. Your Dad John McIntyre
Chris Savino
Scare Tactics: After watching a horror film, Dexter and his father become easily frightened.
A Mom Cartoon: This short, first aired as part the 56th episode, was repeated. Dexter's mom fights another woman at the supermarket for some new latex gloves.
My Dad vs. Your Dad: Dexter and Mandark's fathers become embroiled in a conflict after trying defuse one between their sons.

Season 4 (2002–2003)

No. in
Series
No. in
Season
Episode Title Directors Original air date
66 01 Beau Tie Don Judge
Chris Savino
November 22, 2002
Remember Me Chris Savino
Overlabbing Don Judge
Chris Savino
Beau Tie: Dee Dee has a new boyfriend who likes science and Einstein. Unfortunately, when Dexter tries to get the boyfriend, named Beau, to see his stuff, Beau ends up running away from the both of them in fear.
Remember Me: When Dexter gets amnesia, Dee Dee decides to play tricks on him by creating a whole new identity for him.
Overlabbing: Dexter and Mandark drill underground to expand their labs, but end up running into each other's work. So they agree to share the lab, inducing chaos.
67 02 Sis-Tem Error Don Judge
Chris Savino
April 25, 2003
Bad Cable Manners Chris Savino
Dexter's Library Don Judge
Chris Savino
Sis-Tem Error: Dee Dee accidentally shuts down Dexter's lab.
Bad Cable Manners: Dexter pirates cable for his father.
Dexter's Library: Dexter becomes the stern administrator of his local library.
68 03 The Scrying Game Chris Savino May 2, 2003
Monstrosi-Dee Dee Don Judge
Chris Savino
Dad Man Walking
The Scrying Game: Dee Dee learns a new game that can predict the future.
Monstrosi-Dee Dee: A monster is roaming Dexter's lab, but he doesn't realize that it's actually Dee Dee, under the effects of one of his experiments.
Dad Man Walking: Dexter's father sleepwalks into his son's lab.
69 04 Dexter's Little Dilemma Don Judge
Chris Savino
May 9, 2003
Faux Chapeau
Tim Walker
Chris Savino
Dexter's Little Dilemma: Dexter shrinks his parents and puts them into a model of their house for observation.
Faux Chapeau: Dexter's newest invention looks like a hat, so Dee Dee takes it and wears it around town.
D²: Dexter and Dee Dee realize that they make a good team. They decide to do stuff together, but that only makes things worse.
70 05 Head Band Don Judge
Chris Savino
May 16, 2003
Stuffed Animal House Chris Savino
Used Ink Don Judge
Chris Savino
Head Band: Dee Dee gets a song stuck in her head which is actually a virus. Dexter and Mom soon catch it too.
Stuffed Animal House: Dee Dee's stuffed animals come to life and roam the house when Dee Dee uses a formula that brings inanimate objects to life.
Used Ink: Dexter creates a new type of ink that lets him command people to do whatever he wants. However, when Mandark gets his hands on it, Dexter becomes the one being commanded.
71 06 School Girl Crushed Don Judge
Chris Savino
May 23, 2003
Chess Mom
Father Knows Least
School Girl Crushed: Dexter and Mandark are both outperformed by a new girl at school, so they team up to get rid of her.
Chess Mom: Dexter's mother attempts to support him during a chess tournament but does nothing but embarrass him.
Father Knows Least: Dexter's father is left to watch the kids while his wife visits her sister.
72 07 Dexter the Barbarian Chris Savino May 30, 2003
Tuber Time Don Judge
Chris Savino
Sore Eyes
Dexter the Barbarian: Dexter tries to emulate the barbarian hero of his favorite comic book.
Tuber Time: Dexter studies the potato. When he is fascinated by its power to light up a light bulb, tries to use it as an energy source.
Sore Eyes: Dexter tries to improve his eyesight by giving himself laser eye surgery, but goes too far in doing so.
73 08 Babe Sitter Robert Alvarez
Chris Savino
September 5, 2003
Mountain Mandark Don Judge
Chris Savino
2Geniuses 2Gether 4Ever
Babe Sitter: Dee Dee is hired by Mandark's parents to babysit him.
Mountain Mandark: Mandark gets in touch with nature.
2Geniuses 2Gether 4Ever: Dexter decides to work with Mandark, but finds himself doing all the work.
74 09 Height Unseen Don Judge
Chris Savino
September 12, 2003
Bygone Errors Robert Alvarez
Chris Savino
Folly Calls Don Judge
Chris Savino
Height Unseen: Again tired of being short, but mindful of his past failures, Dexter decides to make everyone shorter than himself.
Bygone Errors: An elder Dexter talks about the glory days, and his sister is still there to inject her opinions, telling him what really happened.
Folly Calls: When Dee Dee accidentally chops off her pigtail, Dexter gives her some hair growth potion.
75 10 Voice Over Robert Alvarez
Chris Savino
September 19, 2003
Blonde Leading the Blonde Don Judge
Chris Savino
Comic Stripper
Voice Over: When Dexter's computer gets laryngitis, Dexter must find a replacement voice.
Blonde Leading the Blonde: Dexter refuses to admit that blondes have more fun, so Dee Dee secretly dyes his hair blond to prove it to him.
Comic Stripper: Dexter finds out that all of Mandark's plans are taken from a comic book.
76 11 Tee Party Don Judge
Chris Savino
September 26, 2003
Dexter's Wacky Races
Tee Party: Dexter and his father enter a golf tournament, but Dexter's father proves inept at the sport.
Dexter's Wacky Races: Dexter, Monkey, the Justice Friends, Dee Dee, her imaginary friend Koosalagoopagoop, Mandark, his parents, and Dexter's parents participate in a cross-country race.
77 12 Chicken Scratch Genndy Tartakovsky November 4, 2003
The Lab of Tomorrow Don Judge
Chris Savino
Garage Sale
Chicken Scratch: 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.
The Lab of Tomorrow: Monkey narrates a documentary of the future of laboratories and sciences.
Garage Sale: Dexter creates a device that turns people into hideous blobs. His parents then sell it at a garage sale, where it ends up in Mandark's hands.

Note: "Chicken Scratch" appeared in theaters as a bonus short before The Powerpuff Girls Movie on July 3, 2002.

78 13 They Got Chops Chris Savino November 20, 2003
Poetic Injustice Robert Alvarez
Chris Savino
Comedy of Feathers Genndy Tartakovsky
Chris Savino
They Got Chops: When Dee Dee's Judo skills prove too much for Dexter, Dexter learns how to fight back from the same dojo she went to.
Poetic Injustice: Dexter falls in love with a new girl at his school, but cannot win her heart.
Comedy of Feathers: In the series finale, Dexter is forced to take Dee Dee to the zoo; she ends up trying to save an ostrich, with disastrous results.

Specials

No. Episode Title Original air date
S1 Ego Trip December 10, 1999
An army of robots comes out of Dexter's time machine, under orders to "destroy the one who saves the future." Believing them to mean him, Dexter travels to the future in order to see this event happen. He is horrified to find himself a wimpy young man, who works designing office cubicles for Mandark, his boss. Dexter convinces his older self that he is a genius who will one day save the future, and they travel to a later time together. Although they arrive in a scientific utopia, they find that the Dexter in this period is a doddering old man who can barely remember anything he has ever done. Backing up a few years, the three Dexters discover the world has fallen into ruin, and the inhabitants are extremely stupid. The Dexter in this time is a muscular hero, who reveals that Mandark stole his most prized invention, the Neurotomic Protocore (which D22 left in his cubicle). However, Mandark did not use the core correctly and reversed its energies, causing the widespread stupidity and allowing him to forbid technology to all but himself. All four of them team up to bring down Mandark, using the laboratory to build a large robot to storm Mandark's castle. When they arrive to confront Mandark, he summons his counterparts from the time period of each Dexter. At the climax of the battle, Dee Dee appears from the time machine and is revealed to be the one who saves the future (due to her curiosity about buttons). In a jealous rage, the Dexters build and send back through time an army of robots to destroy her — the very same seen at the beginning of the film. As the original Dexter returns to his own time and sees himself fighting with the robots, he realizes he has completed the cycle of events. However, tired of the whole ordeal, he decides to forget it and have a snack.
S2 Rude Removal January 22, 2013
Dexter wants to make himself more perfect by removing all of his rude qualities using a "Rude Extractor". Dee Dee naturally shows up to unintentionally mess up Dexter's plan, causing both of them to be hit with an unstable beam from Dexter's invention. The beam separates them into good and evil halves, and the evil halves promptly knock their good sides unconscious. Immediately the bad halves start cursing at each other and wrecking up Dexter's lab before going to eat lunch. They continue to curse and act rudely until their good sides wake up. The good sides trap their rude counterparts in the lab, and exit the lab into Dexter's room to find their mother with a bar of soap, presumably to wash out her kids' mouths with.

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