Season 1 of Grim & Evil premiered on August 24, 2001.

Season 2 of Grim & Evil premiered on June 13, 2003.

Season 3 of Grim & Evil premiered on June 11, 2004.

Season 4 of Grim & Evil premiered on October 1, 2004.

Season 5 of Grim & Evil premiered on June 10, 2005.