David Ketchum (born February 4, 1928, in Quincy, Illinois) is an American character actor and comedian best known for his appearances in television sitcoms, including
The Mary Tyler Moore Show,
Camp Runamuck, and
Get Smart.: 386 Ketchum studied physics at UCLA and joined other UCLA students in entertaining military personnel around the world for the USO. Ketchum had a radio program for seven years in San Diego, California. On television, he portrayed Counselor Spiffy in
Camp Runamuck. He was also a regular on
I'm Dickens, He's Fenster, playing the role of Mel Warshaw.: 496-497 In
Get Smart, he played Agent 13, and was often seen in recurring jokes on the show hiding in unusual places such as mailboxes or fire hydrants. Ketchum reprised the role in the 1989 TV movie
()