Clark made numerous appearances in film and television, particularly in the 1970s (notably as Mr. Farcus in the 1970 movie
The Landlord, as Mr. Small in the 1971 film
They Might Be Giants, and in the 1976 remake of
A Star Is Born). Two of his best-known TV characters were
John Doe #6 on the
NBC drama
St. Elsewhere, a likeable and humorous
psychiatric patient, and Mr. Herd, a patient of psychologist Bob Hartley on
The Bob Newhart Show, a long running
CBS situation comedy. He played Mr. Belding in the original pilot of the series
Good Morning, Miss Bliss but was subsequently replaced by
Dennis Haskins. Clark also played Roger Barton on an episode of
The Golden Girls, and played Joe Carruthers, the man who later becomes
Santa Claus, in the holiday comedy film
Ernest Saves Christmas. He portrayed his Santa role again in the 1996 animated
Christmas in Cartoontown. Clark also appeared on two episodes of
M*A*S*H, once as Hawkeye's college buddy, a Navy doctor on board an aircraft carrier off the Korean coast. Later Clark played another Benjamin Pierce who came to the 4077th to retrieve mail that Hawkeye had received in an Army mixup. Clark also played roles on
Barney Miller, appearing in six episodes. He was a regular on the 1975 situation comedy
Karen. In 1977, he appeared in an episode of the ABC crime drama
The Feather and Father Gang. In 1995, he had a guest appearance on the sitcom
Full House as DJ Tanner's (
Candace Cameron-Bure) high school principal, Mr. Robolard, in the eighth-season episode "Up on the Roof". == Filmography ==