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The Worst Episodes of Dexter's Laboratory

Every episode of Dexter's Laboratory ranked from worst to best. Explore the Worst Episodes of Dexter's Laboratory!

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Dexter, a boy-genius with a secret laboratory, constantly battles his sister Dee Dee, who always gains access despite his best efforts to keep her out, as well as his arch-rival and neighbor, Mandark.

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Episode Rankings

  1. #1 Worst Episode
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    Dexter's Laboratory Season 1 Episode 15 - Dimwit Dexter
    0.0/10(0 votes)

    #1 - Dimwit Dexter

    S1:E15

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

    Director:Genndy Tartakovsky
    Writer:Unknown

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  2. Dexter's Laboratory Season 1 Episode 18 - The Big Sister
    0.0/10(0 votes)

    #2 - The Big Sister

    S1:E18

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

    Director:Genndy Tartakovsky
    Writer:Genndy Tartakovsky

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  3. Dexter's Laboratory Season 4 Episode 3 - Overlabbing
    5.8/10(133 votes)

    #3 - Overlabbing

    S4:E3

    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.

    Directors:Chris Savino, Don Judge
    Writer:Clay Morrow

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  4. Dexter's Laboratory Season 3 Episode 3 - Sole Brother
    5.9/10(137 votes)

    #4 - Sole Brother

    S3:E3

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

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  5. Dexter's Laboratory Season 3 Episode 11 - A Mom Cartoon
    5.9/10(160 votes)

    #5 - A Mom Cartoon

    S3:E11

    Mom spends a day at the supermarket.

    Director:Chris Savino
    Writer:Unknown

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  6. Dexter's Laboratory Season 4 Episode 9 - Dad Man Walking
    5.9/10(131 votes)

    #6 - Dad Man Walking

    S4:E9

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

    Directors:Chris Savino, Don Judge
    Writer:Carlos Ramos

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  7. Dexter's Laboratory Season 3 Episode 5 - A Quackor Cartoon
    6.0/10(133 votes)

    #7 - A Quackor Cartoon

    S3:E5

    Quackor returns to battle Monkey in Dexter's Lab.

    Director:Chris Savino
    Writer:Unknown

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  8. Dexter's Laboratory Season 3 Episode 9 - The Grand Daddy of All Inventions
    6.0/10(128 votes)

    #8 - The Grand Daddy of All Inventions

    S3:E9

    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!

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  9. Dexter's Laboratory Season 3 Episode 12 - The Mock Side of the Moon
    6.0/10(140 votes)

    #9 - The Mock Side of the Moon

    S3:E12

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

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  10. Dexter's Laboratory Season 4 Episode 7 - The Scrying Game
    6.0/10(130 votes)

    #10 - The Scrying Game

    S4:E7

    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...

    Director:Chris Savino
    Writer:Mike Stern

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  11. Dexter's Laboratory Season 3 Episode 1 - Streaky Clean
    6.1/10(143 votes)

    #11 - Streaky Clean

    S3:E1

    Dexter creates a device to keep his clothes clean.

    Directors:Robert Alvarez, Chris Savino
    Writer:Unknown

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  12. Dexter's Laboratory Season 4 Episode 4 - Sis-Tem Error
    6.1/10(129 votes)

    #12 - Sis-Tem Error

    S4:E4

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

    Directors:Chris Savino, Don Judge
    Writer:Mark O'Hare

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  13. Dexter's Laboratory Season 4 Episode 8 - Monstrosi-Dee Dee
    6.1/10(133 votes)

    #13 - Monstrosi-Dee Dee

    S4:E8

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

    Directors:Chris Savino, Don Judge
    Writer:Gabe Swarr

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  14. Dexter's Laboratory Season 4 Episode 12 - D²
    6.1/10(127 votes)

    #14 - D²

    S4:E12

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

    Directors:Chris Savino, James T. Walker
    Writer:Mark O'Hare

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  15. Dexter's Laboratory Season 3 Episode 2 - A Dad Cartoon
    6.2/10(167 votes)

    #15 - A Dad Cartoon

    S3:E2

    Dad decides to give the car a retouch.

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  16. Dexter's Laboratory Season 3 Episode 7 - Copping an Attitude
    6.2/10(134 votes)

    #16 - Copping an Attitude

    S3:E7

    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.

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  17. Dexter's Laboratory Season 3 Episode 8 - A Failed Lab Experiment
    6.2/10(128 votes)

    #17 - A Failed Lab Experiment

    S3:E8

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

    Director:Chris Savino
    Writer:Unknown

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  18. Dexter's Laboratory Season 3 Episode 13 - If Memory Serves
    6.2/10(137 votes)

    #18 - If Memory Serves

    S3:E13

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

    Directors:Robert Alvarez, Chris Savino
    Writer:Unknown

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  19. Dexter's Laboratory Season 4 Episode 11 - Faux Chapeau
    6.2/10(127 votes)

    #19 - Faux Chapeau

    S4:E11

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

    Directors:Chris Savino, Don Judge
    Writer:Chris Reccardi

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  20. Dexter's Laboratory Season 3 Episode 4 - Mind Over Chatter
    6.3/10(129 votes)

    #20 - Mind Over Chatter

    S3:E4

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

    Directors:Robert Alvarez, Chris Savino
    Writer:Unknown

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  21. Dexter's Laboratory Season 3 Episode 10 - Poppa Wheely
    6.3/10(128 votes)

    #21 - Poppa Wheely

    S3:E10

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

    Directors:John McIntyre, Chris Savino
    Writer:Unknown

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  22. Dexter's Laboratory Season 4 Episode 2 - Remember Me?
    6.3/10(132 votes)

    #22 - Remember Me?

    S4:E2

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

    Director:Chris Savino
    Writer:Kevin Kaliher

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  23. Dexter's Laboratory Season 4 Episode 6 - Dexter's Library
    6.3/10(127 votes)

    #23 - Dexter's Library

    S4:E6

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

    Directors:Chris Savino, Don Judge
    Writer:Mark O'Hare

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  24. Dexter's Laboratory Season 4 Episode 5 - Bad Cable Manners
    6.4/10(128 votes)

    #24 - Bad Cable Manners

    S4:E5

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

    Director:Chris Savino
    Writer:Clay Morrow

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  25. Dexter's Laboratory Season 4 Episode 10 - Dexter's Little Dilemma
    6.4/10(126 votes)

    #25 - Dexter's Little Dilemma

    S4:E10

    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.

    Directors:Chris Savino, Don Judge
    Writer:Clay Morrow

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Worst Episodes Summary

"Dimwit Dexter" is the worst rated episode of "Dexter's Laboratory". It scored /10 based on 0 votes. Directed by Genndy Tartakovsky and written by Unknown, it aired on 5/26/1996. This episode scored 0.0 points lower than the second lowest rated, "The Big Sister".