Jeff Corey

He was born Arthur Zwerling in Brooklyn on August 10, 1914, and took the name Jeff Corey on his agent's advice when he started making films in 1937. Source: Wikipedia

His first professional stage job was in Leslie Howard's 1936 Hamlet, carrying a spear and understudying Rosencrantz. Source: Wikipedia

On network radio he played Detective Lieutenant Ybarra on The Adventures of Philip Marlowe, on NBC in 1947 and CBS from 1948 to 1951. Source: Wikipedia

RadioGOLDINdex lists him on CBS's Escape from 1947 to 1951, including "Three Skeleton Key" (March 17, 1950) and "Mars Is Heaven" (June 2, 1950). Source: RadioGOLDINdex

The same index lists his Lux Radio Theatre work from "Libel!" (January 13, 1941) to "Red River" (March 7, 1949), often doubling in several small parts. Source: RadioGOLDINdex

The index also lists him on eleven Night Beat broadcasts (1950-1952) and six of NBC University Theatre (1949-1950). Source: RadioGOLDINdex

Called before the House Un-American Activities Committee in the early 1950s, he refused to name alleged Communists and was blacklisted for about 12 years. Source: Wikipedia

He became a leading Hollywood acting teacher; his students included James Dean, Jack Nicholson, Jane Fonda and Robin Williams. Source: Wikipedia

Back on screen from 1962, he appeared in True Grit and Butch Cassidy and the Sundance Kid (both 1969). Source: Wikipedia