William Sylvester Filmography
- Actor (57 credits)
- 2001: The Making of a Myth (2001) Dr. Heywood R. Floyd, хроника, not listed in credits
- First Family (1980) TV Interviewer
- Buck Rogers in the 25th Century (1979) Lt. General Preston Myers
- Heaven Can Wait (1978) Nuclear Reporter
- The Hardy Boys/Nancy Drew Mysteries (1977) Martin Dettman
- Gemini Man (мини-сериал) (1976) Leonard Driscoll
- Riding with Death (1976) Leonard Driscoll
- Quincy M.E. (1976) Attorney David Stillwell
- Guilty or Innocent: The Sam Sheppard Murder Case (1975)
- The Hindenburg (1975) Luftwaffe Colonel
- Caribe (1975) Inspector Morane
- Mobile One (1975)
- Busting (1974) Mr. Weldman
- Get Christie Love! (1974) Gleason
- The Six Million Dollar Man (1974) Admiral Prescott
- Don't Be Afraid of the Dark (1973) Tom Henderson
- Harry O (1973) Ben Loretz
- The Magician (1973) Peter Hayden
- Banacek (1972) Dr. Stahl
- The Lawyer (1970) Paul Harrison
- Howdy (1970)
- San Francisco International Airport (1970) Colonel Wilkins
- The Challengers (1970) Brad York
- 2001: A Space Odyssey (1968) Dr. Haywood R. Floyd
- The Hand of Night (1968) Paul Carver
- The Syndicate (1968) Burt Hickey
- The High Chaparral (1967) Jack Simmons
- You Only Live Twice (1967) Pentagon Official, not listed in credits
- The Baron (1966) Nick
- The Troubleshooters (1965) Al Stevens
- Devils of Darkness (1965) Paul Baxter
- Green Acres (1965) Aide to the Governor
- Blind Corner (1965) Paul Gregory
- Devil Doll (1964) Mark English
- Ring of Spies (1964) Gordon Lonsdale
- Gorgo (1961) Sam Slade
- Offbeat (1961) Layton / Steve Ross
- Ghost Squad (1961) Brett
- Information Received (1961) Rick Hogan
- Danger Man (1960)
- Whirlpool (1959) Hermann
- Julius Caesar (1959) Antony
- Knight Errant Limited (1959) Clint Case
- Dublin Nightmare (1958) John Kevin
- High Tide at Noon (1957) Alec Douglas
- The Schirmer Inheritance (1957) George Carey
- ITV Television Playhouse (1955) Mr. Black
- ITV Play of the Week (1955) Ben Hubbard
- Portrait of Alison (1955) Dave Forrester
- The Stranger Came Home (1954) Philip Vickers
- What Every Woman Wants (1954) Jim Barnes
- Appointment in London (1953) Mac
- House of Blackmail (1953) Jimmy
- The Yellow Balloon (1953) Len Turner
- Albert R.N. (1953) Lt. «Texas» Norton
- They Were Not Divided (1950) American soldier, not listed in credits
- Give Us This Day (1949) Giovanni
