William Sylvester
- The 9th Wonder of the World: The Making of 'Gorgo'
2013 Sam Slade (archive footage)
- 2001: The Making of a Myth
2001 Dr. Heywood R. Floyd (archive footage) (uncredited)
- First Family
1980 TV Commentator Howard
- Buck Rogers in the 25th Century
1979 Lt. General Preston Myers
- Heaven Can Wait
1978 Nuclear Reporter
- Riding with Death
1976 Leonard Driscoll
- Quincy, M.E.
1976 Joe Crawford
- Gemini Man
1976 Leonard Driscoll
- The Hindenburg
1975 Luftwaffe Colonel
- Switch
1975 Ellis
- Busting
1974 Mr. Weldman
- Harry O
1974
- The Six Million Dollar Man
1974 Frederick Collins
- Don't Be Afraid of the Dark
1973 Tom Henderson
- The Magician
1973 Peter Hayden
- Banacek
1972 Dr. Stahl
- Cannon
1971
- The Challengers
1970 Brad York
- The Lawyer
1970 Paul Harrison
- McCloud
1970
- San Francisco International Airport
1970 Colonel Wilkins
- Marcus Welby, M.D.
1969 Paul Berwick
- 2001: A Space Odyssey
1968 Dr. Heywood Floyd
- The Hand of Night
1968 Paul Carver
- The Syndicate
1968 Burt Hickey
- Red and Blue
1968 Trumpeter
- You Only Live Twice
1967 Pentagon Official (uncredited)
- The High Chaparral
1967 Jack Simmons
- Devils of Darkness
1965 Paul Baxter
- Green Acres
1965 Dr. Hoffman
- The F.B.I.
1965 Tom Barber
- The Troubleshooters
1965 Al Stevens
- Devil Doll
1964 Mark English
- Blind Corner
1964 Paul Gregory
- Ring of Spies
1964 Gordon Lonsdale
- Incident at Midnight
1963 Vince Warren
- The Saint
1962 Foots Fortunati
- Gorgo
1961 Sam Slade
- Offbeat
1961 Layton / Steve Ross
- Information Received
1961 Rick Hogan
- Drama 61-67
1961 Mark Lander
- Danger Man
1960 James Carpenter / Oscar Schumak
- Whirlpool
1959 Hermann
- Dublin Nightmare
1958 John Kevin
- High Tide at Noon
1957 Alec Douglas
- Armchair Theatre
1956
- Portrait of Alison
1955 Dave Forrester
- The Unholy Four
1954 Philip Vickers
- What Every Woman Wants
1954 Jim Barnes
- House of Blackmail
1953 Jimmy
- The Yellow Balloon
1953 Len Turner
- Appointment in London
1953 Mac
- Albert R.N.
1953 Texas
- They Were Not Divided
1950 American Soldier (uncredited)
- Give Us This Day
1949 Giovanni
