Dr. Killemoff is the arch-enemy of the Toxic Avenger and his team of hideously deformed creatures of super-human size and strength called the Toxic Crusaders. He is the leader and Chairman of Apocalypse Inc., located in the polluted Island City, near Tromaville New Jersey. His appearance is a thinly veiled disguise of his true form, that which is a giant humanoid cock-roach from the planet Smogula. He wears a respirator that pumps polluted air into his lungs in order for him to survive.