Mary Harrington was Invader Zim's executive producer. Along with Invader Zim, she has also produced Ni Hao, Kai-Lan, Hey Arnold!, The Angry Beavers, Aaahh!! Real Monsters, Adventures in Diapers, Rocko's Modern Life, Kablam! (Only in one episode), Doug, The Ren & Stimpy Show, Psyched for Snuppa, Dino-Riders in the Ice Age and Dino-Riders (Only in one episode).