"Martin Eugene Mull" is an United States/American actor who has appeared in many television and film roles. He is also a comedian, Painting/painter, and recording artist. As an actor, he first became known in his role on Mary Hartman, Mary Hartman and its spin-off Fernwood 2 Night. Among his other notable roles are Colonel Mustard in the 1985 film Clue (film)/Clue, Leon Carp on Roseanne, and Willard Kraft on Sabrina, the Teenage Witch (TV series)/Sabrina, the Teenage Witch.If you enjoy these quotes, be sure to check out other famous actors! More Martin Mull on Wikipedia.