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50 free Dexter's Laboratory trivia questions with answers — entertainment quiz, new questions added Aug 2026.
Dexter's Laboratory started as a two-and-a-half-minute pencil test by a CalArts student who had learned English from cartoons. Within a few years it was Cartoon Network's highest-rated show, the first of the Cartoon Cartoons, and the series that launched Genndy Tartakovsky toward Samurai Jack and Clone Wars. The setup never changed: a tiny boy genius with an unexplained accent, a vast secret lab behind the bookcase, and an older sister who wanders in and presses the button. This quiz covers the show's four seasons and 78 episodes, the Dial M for Monkey and Justice Friends segments, the Ego Trip movie that was supposed to end it all, the episode that was never broadcast because of swearing, the balloon in the Macy's parade, and the voice actors, including the Utah-born performer who was also the pig in Babe. Fifty questions from easy to hard, each sourced and each explanation adding one more thing you didn't know about the lab.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Who created Dexter's Laboratory?
Genndy Tartakovsky
He built it from two student films made at CalArts; McCracken, his classmate, went on to create The Powerpuff Girls.
Q 02What is the name of Dexter's older sister?
Dee Dee
She was nearly called Daisy, but the creator felt that name belonged to Disney.
Q 03Where does Dexter keep his secret laboratory?
In his bedroom
His unsuspecting parents never find out; Mom is a germophobe who wears gloves.
Q 04What was the title of the first Dexter's Laboratory pilot, aired in 1995?
Changes
It premiered on February 26, 1995, and was based on a pencil test Tartakovsky made as a student.
Q 05The show was the first original series under which CN programming banner?
Cartoon Cartoons
Four pilots aired on Cartoon Network and TNT between 1995 and 1996 before the half-hour series was ordered.
Q 06How many episodes did the series total when it ended in 2003?
78
The first two seasons made 52; the revival added 26 more across seasons three and four.
Q 07Who ran the revived seasons after the creator left to launch Samurai Jack?
Chris Savino
He was promoted to producer by season four, gaining control of the budget.
Q 08Which 1999 television film was intended to be the series finale?
Ego Trip
It was the first Cartoon Network TV movie ever produced and the creator's directorial debut.
Q 09Who voiced Dexter for the first three seasons?
Christine Cavanaugh
She also voiced Chuckie in Rugrats and the pig in Babe before retiring in 2001.
Q 10Who took over the voice of Dexter in the later seasons?
Candi Milo
The switch came after the original actress retired from voice work in 2001.
Q 11What is Dexter's pet monkey secretly?
A crime-fighting superhero
His segment, Dial M for Monkey, pairs him with Agent Honeydew.
Q 12Who is Monkey's partner in Dial M for Monkey?
Agent Honeydew
She is voiced by Kath Soucie, who also voices Dexter's Mom.
Q 13Which trio of roommate superheroes has its own segment on the show?
The Justice Friends
Major Glory, Valhallen and the Infraggable Krunk parody Captain America, Thor and the Hulk.
Q 21At which art school did the creator make the student films that became the series?
California Institute of the Arts
Classmates Craig McCracken, Rob Renzetti and Paul Rudish later worked on the show with him.
Q 22Which superhero cartoon hired the creator to work in Madrid after seeing his student film?
Batman: The Animated Series
The 1991–92 pencil test "Changes" impressed the producers at a university screening.
Q 23On which Hanna-Barbera show did the creator work with McCracken, Renzetti and Rudish?
2 Stupid Dogs
Q 14Which Justice Friend wields an electric guitar and talks in Shakespearean-surfer speak?
Valhallen
He is voiced by Tom Kenny, later the voice of SpongeBob SquarePants.
Q 15What colour is the Infraggable Krunk?
Purple
He is a monster with the intelligence of a child, a parody of the Hulk, voiced by Frank Welker.
Q 16Which season-two episode was never broadcast because the characters swear?
Rude Removal
Rude clones of the siblings were shown only at festivals until Adult Swim put it on YouTube in 2013.
Q 17Which Dial M for Monkey episode was pulled over the Silver Spooner and a drunk Krunk?
Barbequor
The Silver Surfer spoof was seen as a gay stereotype; the episode was swapped for "Dexter's Lab: A Story".
Q 18"Dexter and Computress Get Mandark!" was based on an idea submitted by a fan of what age?
Six
Tyler Samuel Lee's audiotape narration was used in the episode, drawn with crayon-like backgrounds.
Q 19Which episode debuted in cinemas alongside The Powerpuff Girls Movie in 2002?
Chicken Scratch
It was later broadcast as a season-four episode in November 2003.
Q 20In which city was the show's creator born?
Moscow
His family moved to the US when he was seven; he learned English by watching cartoons.
The four were allowed to work in a trailer in the studio parking lot, where his best-known ideas began.
Q 24What was the creator's last job before the series, on The Critic?
Sheet timer
He was unhappy there and accepted Larry Huber's offer to expand his student film into a seven-minute storyboard.
Q 25How old was the creator when the series was greenlit, among the youngest directors then?
27
Cartoon Network president Betty Cohen and producer Mike Lazzo gave the go-ahead.
Q 26On which network did the first season premiere on April 27, 1996?
TNT
Cartoon Network and TBS aired it the following day.
Q 27What were the two main characters nearly named before Dexter and Dee Dee were chosen?
Dartmouth and Daisy
"Dartmouth doesn't exactly roll off the tongue," the creator said, and Daisy belonged to Disney.
Q 28Which character was originally intended to be the protagonist?
Dee Dee
She began as a tall ballerina in a student film; the siblings' roles were later switched.
Q 29Why does Dexter speak with an accent, according to his creator?
All serious scientists have accents
It also echoes the creator's own thick accent as a child immigrant mocked in Chicago.
Q 30The sibling rivalry was modelled on the creator's relationship with whom?
His older brother Alex
Alex became a computer engineer and once kept Genndy away from his "intricate" toy soldiers.