Martin Eugene Mull (, August 18, 1943 – June 27, 2024) was an American actor, musician, and painter. He became known on Mary Hartman, Mary Hartman, its spin-off Fernwood 2 Night, and America 2 Night. His other notable roles included Colonel Mustard in the 1985 film Clue, Leon Carp on Roseanne, Willard Kraft on Sabrina the Teenage Witch, Vlad Masters/Vlad Plasmius on Danny Phantom, and Gene Parmesan on Arrested Development. He had a recurring role on Two and a Half Men as Russell, a drug-using, humorous pharmacist. (Via Wikipedia)