Davis Roberts (born Robert A. Davis, March 7, 1917 – July 18, 1993) was an American character actor whose career spanned six decades, from the late 1940s until his death in 1993. He started out making films in the 1940s and 1950s and expanded into television work in the following decades. He played the role of Dr. Caldwell in three episodes in the second and third seasons of the NBC-TV sitcom series Sanford and Son, and as Dr.