Read MoreMartin Mull, who played Colonel Mustard in Clue, Roseanne’s boss Leon Carp in the ABC comedy Roseanne and starred with Fred Willard on Norman Lear’s Fernwood 2 Nite, died Thursday at his home. He was 80. The news was revealed by his daughter Maggie Mull, an exec producer on Family Guy. “I am heartbroken to