The BEST episodes of Dexter's Laboratory season 1

Every episode of Dexter's Laboratory season 1, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Dexter's Laboratory season 1!

Sleep tight, America! Your fate lies safely in the hands of Dexter, a child genius who whips up dazzling, world-saving inventions in his secret laboratory. Big sister Dee Dee frequently wrecks his experiments, but his bigger nemesis is Mandark, his brilliant rival at Huber Elementary School. Mom and Dad, of course, have no idea what their little angel is up to.

Last Updated: 11/5/2024Network: Cartoon NetworkStatus: Ended
Monstory
star
8.14
22 votes

#1 - Monstory

Season 1 - Episode 38 - Aired 1/1/1997

Dexter accidentally turns Dee Dee into a monster, so he has to turn into one himself to stop her.

Writer: Don Shank
Watch Now:Amazon
Tribe Called Girl
star
8.10
29 votes

#2 - Tribe Called Girl

Season 1 - Episode 30 - Aired 12/11/1996

Dee Dee, LeeLee and MeeMee are having a pajama party, which Dexter decides to explore to learn the behavior of other "species".

Writer: Don Shank
Watch Now:Amazon
Old Man Dexter
star
8.08
97 votes

#3 - Old Man Dexter

Season 1 - Episode 9 - Aired 5/12/1996

After Dexter is banned from watching The Late Early Movie due to his age, he decides to accelerate his age so that he can see the movie, but Dee Dee tampers with the age acceleration process, causing him to turn into a 95-year old man.

Watch Now:AmazonApple TV
Inflata Dee Dee
star
8.08
26 votes

#4 - Inflata Dee Dee

Season 1 - Episode 36 - Aired 1/1/1997

Dee Dee tries on Dexter's inflatable suit, and is swept away on the wind. In getting her down, Dexter accidentally destroys the suit. Dee Dee fixes it by tying balloons to it.

Watch Now:Amazon
The Justice Friends: Ratman
star
8.00
29 votes

#5 - The Justice Friends: Ratman

Season 1 - Episode 32 - Aired 12/18/1996

While searching the basement, the Justice Friends discover a new hero with the special ability of repairing.

Writer: Charlie Bean
Watch Now:Amazon
Mandarker
star
8.00
24 votes

#6 - Mandarker

Season 1 - Episode 35 - Aired 12/25/1996

Dexter and Mandark participate in a science fair competition, but Mandark finds himself completely without resources, desperate, he turns to the dark magics...

Writer: Lou Romano
Watch Now:Amazon
Way of the Dee Dee
star
7.94
32 votes

#7 - Way of the Dee Dee

Season 1 - Episode 28 - Aired 12/11/1996

Dee Dee tries to get Dexter to loosen up. It works, but Dexter ends up trying to destroy his lab. Dee Dee realizes her mistake, that she tried to change who Dexter is.

Watch Now:Amazon
Jurassic Pooch
star
7.92
52 votes

#8 - Jurassic Pooch

Season 1 - Episode 13 - Aired 5/26/1996

Dexter creates a Tyrannosaurus Rex that has the brain and heart of a dog, and Dee Dee makes him her pet.

Watch Now:AmazonApple TV
The Big Cheese
star
7.89
45 votes

#9 - The Big Cheese

Season 1 - Episode 27 - Aired 12/4/1996

Dexter decides to study french with an old record, but when the record repeats constantly "Omellete du fromage", it becomes everything Dexter can say.

Writer: Charlie Bean
Watch Now:AmazonApple TV
The Justice Friends: Can't Nap
star
7.83
24 votes

#10 - The Justice Friends: Can't Nap

Season 1 - Episode 37 - Aired 1/1/1997

Major Glory tries to keep White Tiger out of his property with Krunk to help him.

Watch Now:Amazon
The Justice Friends: Say Uncle Sam
star
7.81
32 votes

#11 - The Justice Friends: Say Uncle Sam

Season 1 - Episode 29 - Aired 12/11/1996

Mayor Glory has one week to teach Valhallen and Krunk some manners before his Uncle Sam arrives.

Dexter's Rival
star
7.79
82 votes

#12 - Dexter's Rival

Season 1 - Episode 7 - Aired 5/12/1996

Mandark enrolls at Dexter's school, quickly overshadowing Dexter and forces Dexter to shut down his lab to add more power to his own lab. When Mandark falls in love with Dee Dee, Dexter sets up a date between the two (only because he knew Dee Dee would destroy Mandark's lab).

Watch Now:Apple TV
Spacecase
star
7.78
32 votes

#13 - Spacecase

Season 1 - Episode 31 - Aired 12/18/1996

To get rid of some aliens, Dexter offers Dee Dee as a test subject tricking her into thinking they're going to candy land. The guilt drives Dexter crazy and he goes to rescue her. The aliens willingly gives Dee Dee back (she wrecked their ship looking for candy).

Double Trouble
star
7.75
59 votes

#14 - Double Trouble

Season 1 - Episode 10 - Aired 5/19/1996

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, causing havoc.

Watch Now:Apple TV
Dial M for Monkey: Barbequor
star
7.72
60 votes

#15 - Dial M for Monkey: Barbequor

Season 1 - Episode 11 - Aired 5/19/1996

Monkey's birthday is interrupted by Barbequor, a villain who wants to roast Earth for his next meal.

Directors: Paul Rudish
Watch Now:Apple TV
Game Over
star
7.68
38 votes

#16 - Game Over

Season 1 - Episode 21 - Aired 11/20/1996

A video game takes over Dexter's lab.

Dream Machine
star
7.67
33 votes

#17 - Dream Machine

Season 1 - Episode 24 - Aired 11/27/1996

Haunted by nightmares about Dee-Dee explaining to Einstein the purpose of meaning, Dexter decides to induce pleasant dreams into his mind scientifically. Using a barely awake Dee-Dee to operate his Dream Machine, Dexter embarks on a wondrous little adventure where he absorbs knowledge, learns all languages, and learns how to program a VCR. His dream goes well until Dee-Dee accidentally gives the machine a little nudge in the wrong direction.

Writer: Don Shank
Deedeemensional
star
7.63
260 votes

#18 - Deedeemensional

Season 1 - Episode 1 - Aired 4/28/1996

When Dexter falls victim to a terrifying creature brought forth by his latest invention, Dee Dee goes back in time to warn him. The events only end the episode with a permanent time loop.

Watch Now:Apple TV
Babysitter Blues
star
7.57
37 votes

#19 - Babysitter Blues

Season 1 - Episode 22 - Aired 11/27/1996

Unable to win the heart of his babysitter, Dexter ages himself in the hopes of having better luck.

Directors: Craig McCracken
Dial M for Monkey: Magmanamus
star
7.57
136 votes

#20 - Dial M for Monkey: Magmanamus

Season 1 - Episode 2 - Aired 4/28/1996

Due to all the noise being made by all the citizens of the city on a daily basis, the monster Magmanamus is awakened. However, when he goes to the surface to try and get the people to be quiet, he ends up causing even more noise since the people are frightened of him. Now, Monkey prepares to fight him, unaware that Magmanamus only wants peace and quiet, so he can sleep.

Watch Now:Apple TV
Star Spangled Sidekicks
star
7.56
39 votes

#21 - Star Spangled Sidekicks

Season 1 - Episode 19 - Aired 11/20/1996

Dexter and Dee Dee enter the tryouts for Major Glory's sidekick.

Dial M For Monkey: Huntor
star
7.50
32 votes

#22 - Dial M For Monkey: Huntor

Season 1 - Episode 17 - Aired 6/2/1996

Monkey must fight for his life against a hunter on a jungle asteroid.

The Justice Friends: Bee Where?
star
7.50
18 votes

#23 - The Justice Friends: Bee Where?

Season 1 - Episode 34 - Aired 12/25/1996

Major Glory goes crazy trying to get a bee out of the apartment.

Dial M for Monkey: Simion
star
7.49
94 votes

#24 - Dial M for Monkey: Simion

Season 1 - Episode 8 - Aired 5/12/1996

The result of a space experiment, Simion, a super intelligent chimpanzee, plans to get revenge on humans for the way he is now. However, he teleports Monkey onto his ship in order to convince him to join him in his plan for revenge. After almost being convinced, Monkey attempts to show Simion that revenge isn't the answer.

Watch Now:Apple TV
The Justice Friends: Valhallen's Room
star
7.49
35 votes

#25 - The Justice Friends: Valhallen's Room

Season 1 - Episode 23 - Aired 11/27/1996

Major Glory and Krunk must find Valhallen's guitar before he loses his powers.