David Rasche

David Rasche ( ; born August 7, 1944) is an American theater, film, and television actor who is best known for his portrayal of the title character in the 1980s satirical police sitcom Sledge Hammer! Since then he has often played characters in positions of authority, in both serious and comical turns. In television he is known for his main role as Karl Muller in the HBO drama series Succession and his role as Alden Schmidt in the TV Land comedy series Impastor, as well as recurring and guest performances in numerous programs including L.A. Law, Monk, The West Wing, Veep, Bored to Death, and Ugly Betty.