According to Variety and other sources, Ellsworth-Clark replaced original actor Erik Erik among the youngest siblings in the Sitcom family. Malcolm initially aired seven seasons on Fox, ending the 2006 game. It is centered on a titular character, which is adolescence at the beginning of the show. He is a genius, with a domineering mother, an ignorant father and three clumsy brothers. Malcom is played by Frankie Muniz.