Season 3
Dexter's Laboratory is an American animated television series created by Genndy Tartakovsky about a boy genius named Dexter, who has a secret laboratory hidden behind a bookshelf in his bedroom.
His enemy and rival is a boy named Mandark, but he feuds even more often with his older sister Dee Dee, who does not share his intellectual capabilities.
The series originally aired in the USA on Cartoon Network from 28 April, 1996 to 20 November, 2003. There are 78 half-hour episodes in four seasons.
Dexter's Laboratory originally aired in South Africa on e.tv. It also aired on DStv's Cartoon Network and later on free-to-air broadcaster SABC1.
Synopsis
The adventures of Dexter, boy genius, and his older sister Dee Dee.
Dexter is not your average 8 year old boy. His playground is his secret laboratory and the toys he plays with are his latest inventions.
His older sister Dee Dee is tall and ditzy and always manages to break his inventions and foul his plans.
His arch-enemy is another boy genius called Mandark - although his real name is Susan (yes, really) due to the fact that he had hippie parents. Mandark also has a huge crush on Dee Dee.
Each episode sees another new invention and even more new ways in which Dee Dee manages to mess them up.