Dexter's Rival - Dial M For Monkey: Simion - Old Man Dexter
S01E03 - Airdate: 1996-05-12
Runtime: 30 min
The new kid in school, Mandark, steals Dexter's spotlight and bruises his ego by having a bigger and better laboratory. Seeking revenge on mankind, a super space chimp tries to get Monkey to help him destroy the human race.
Episode details and rating from TVmaze.