Frank Marion Thomas Jr., was an American actor, author and bridge-strategy expert who played both lead and supporting roles on Broadway, in films, in post-World War II radio, and in early television. He was best known for his starring role in Tom Corbett, Space Cadet.

Tom Corbett, Space Cadet is a TV series that aired 1950–1955, depicting the fictional character Tom Corbett. Episodes were 15 minutes (weekdays) and 30 minutes (Saturdays).