Actor
- TV Guide Looks at Science Fiction (1997) .... Himself
- They Went to the Stars (1980) .... Commander Tom Corbett (archive footage)
- First Love (1954) .... Chris
- Tom Corbett, Space Cadet (1950) .... Tom Corbett (3 episodes, 1951-1955)
- One Man's Family (1949) .... Cliff Barbour #1 (1949) (as Frank Thomas Jr.)
- Volume One (1949) .... Bellhop (1 episode, 1949)
- A Woman to Remember (1949) .... Charley Anderson
- The Major and the Minor (1942) .... Cadet Clifford Osborne
- Always in My Heart (1942) .... Martin 'Marty' Scott
- One Foot in Heaven (1941) .... Hartzell Spence at Age 18
- Flying Cadets (1941) .... Newton R. Adams / Ames
- Invisible Stripes (1939) .... Tommy McNeill (friendly stockboy)
- On Dress Parade (1939) .... Cadet Lt. 'Murph' Murphy
- Nancy Drew and the Hidden Staircase (1939) .... Ted Nickerson
- The Angels Wash Their Faces (1939) .... Gabe Ryan
- Nancy Drew... Trouble Shooter (1939) .... Ted Nickerson
- Code of the Streets (1939) .... Bob Lewis
- Nancy Drew... Reporter (1939) .... Ted Nickerson (as Frank Thomas Jr.)
- Nancy Drew -- Detective (1938) .... Theodore 'Ted' Nickerson
- Little Tough Guys in Society (1938) .... Danny
- Boys Town (1938) .... Freddie Fuller
- Tim Tyler's Luck (1937) .... Tim Tyler
- A Dog of Flanders (1935) .... Nello Daas
- Wednesday's Child (1934) .... Robert 'Bobby' Phillips
- Tom Corbett, Space Cadet (1950) .... (unknown episodes)