Dexter's Laboratory

The WORST episodes of Dexter's Laboratory

Every episode ever - ranked by fan votes!

Dexter's Laboratory is the story of a young boy prodigy. Born with an extraordinary mind, Dexter has built his very own extremely high tech and expansive laboratory in his room that NASA could only dream of. But Dexter has to keep his lab a secret for fear others will exploit it. Through out the years, Dexter has had to hide his lab from his parents and others but it is no easy task. All Dexter wants is to spend all the time he can inventing new things in his lab, but between his stupid and annoying older sister Dee Dee constantly barging into his lab and tearing up the place and his arch enemy and rival genius Mandark constantly tiring to take over his lab, Dexter's life is anything but easy. Dexter's Laboratory was originally premiered on Cartoon Network as part of the inaugural, Space Ghost hosted, "World Premiere Toons" before becoming a feature with two full shorts on the regular series, a.k.a. the What a Cartoon Show, it eventually became a series itself. Character

Last Updated: 6/10/2022Network: Cartoon Network
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A Third Dad Cartoon
star
2.70
40 votes

#1 - A Third Dad Cartoon

Season 3 - Episode 25 - Aired 6/21/2002

Dad goes with the kids to play some golf.

A Mandark Cartoon
star
2.80
41 votes

#2 - A Mandark Cartoon

Season 3 - Episode 14 - Aired 2/22/2002

Mandark plans another scheme to get rid of Dexter.

A Boy Named Sue
star
3.59
41 votes

#3 - A Boy Named Sue

Season 3 - Episode 16 - Aired 3/29/2002

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...

A Quackor Cartoon
star
4.00
47 votes

#4 - A Quackor Cartoon

Season 3 - Episode 5 - Aired 11/16/2001

Quackor returns to battle Monkey in Dexter's Lab.

Directors: Chris Savino
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My Dad vs. Your Dad
star
4.38
42 votes

#5 - My Dad vs. Your Dad

Season 3 - Episode 37 - Aired 9/20/2002

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.

A Dad Cartoon
star
4.42
57 votes

#6 - A Dad Cartoon

Season 3 - Episode 2 - Aired 11/16/2001

Dad decides to give the car a retouch.

Watch Now:iTunes
Height Unseen
star
5.90
10 votes

#7 - Height Unseen

Season 4 - Episode 25 - Aired 9/12/2003

Dexter is tired of being short, since his old plan of growing himself didn't work, he decides to make everyone shorter than him.

The Mock Side of the Moon
star
6.38
13 votes

#8 - The Mock Side of the Moon

Season 3 - Episode 12 - Aired 1/18/2002

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

Watch Now:iTunes
Bygone Errors
star
6.64
11 votes

#9 - Bygone Errors

Season 4 - Episode 26 - Aired 9/12/2003

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...

Momdark
star
6.83
23 votes

#10 - Momdark

Season 3 - Episode 6 - Aired 11/16/2001

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

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Dexter's Library
star
7.04
46 votes

#11 - Dexter's Library

Season 4 - Episode 6 - Aired 4/25/2003

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

Watch Now:iTunes
Monstrosi-Dee Dee
star
7.14
42 votes

#12 - Monstrosi-Dee Dee

Season 4 - Episode 8 - Aired 5/2/2003

A Monster starts roaming Dexter's lab, although Dexter doesn't know its just Dee Dee, who ate an apple in a failed lab experiment.

Watch Now:iTunes
Remember Me
star
7.15
47 votes

#13 - Remember Me

Season 4 - Episode 2 - Aired 11/22/2002

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

Directors: Chris Savino
Watch Now:iTunes
The Scrying Game
star
7.16
49 votes

#14 - The Scrying Game

Season 4 - Episode 7 - Aired 5/2/2003

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...

Watch Now:iTunes
If Memory Serves
star
7.17
12 votes

#15 - If Memory Serves

Season 3 - Episode 13 - Aired 2/22/2002

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

Watch Now:iTunes
Sole Brother
star
7.19
27 votes

#16 - Sole Brother

Season 3 - Episode 3 - Aired 11/16/2001

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

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Glove at First Sight
star
7.20
10 votes

#17 - Glove at First Sight

Season 3 - Episode 27 - Aired 6/28/2002

Mom and Dad recall the moments that got them together.

D2
star
7.21
14 votes

#18 - D2

Season 4 - Episode 12 - Aired 5/9/2003

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

Watch Now:iTunes
Dos Boot
star
7.25
12 votes

#19 - Dos Boot

Season 3 - Episode 18 - Aired 6/7/2002

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

Dexter Vs. Santa's Claws
star
7.27
11 votes

#20 - Dexter Vs. Santa's Claws

Season 2 - Episode 105 - Aired 4/29/1998

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

Faux Chapeau
star
7.27
11 votes

#21 - Faux Chapeau

Season 4 - Episode 11 - Aired 5/9/2003

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

Watch Now:iTunes
Overlabbing
star
7.33
48 votes

#22 - Overlabbing

Season 4 - Episode 3 - Aired 11/22/2002

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.

Watch Now:iTunes
Beard To Be Feared
star
7.38
89 votes

#23 - Beard To Be Feared

Season 2 - Episode 1 - Aired 7/16/1997

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.

Watch Now:iTunes
Maternal Combat
star
7.38
123 votes

#24 - Maternal Combat

Season 1 - Episode 3 - Aired 4/28/1996

Dexter creates a "Mom-Droid" robot to have it do all of his mother's duties when she falls ill. But a little carelessness makes the control of the "Mom-Droid" fall into the hands of his sister, DeeDee. Now, the "Mom-Droid" is causing all sorts of havoc around the house, so Dexter builds a "Super Mom-Droid" to combat the original one he made.

Watch Now:iTunes
Quackor the Fowl
star
7.38
68 votes

#25 - Quackor the Fowl

Season 2 - Episode 2 - Aired 7/16/1997

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.

Watch Now:iTunes