William Sylvester
- Compleanno:
- 01/31/1922
- Luogo di nascita:
- Oakland, California, USA:
 | 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) |
 | Roger Moore: A Matter of Class (1995) Self (archive footage) |
 | First Family (1980) TV Commentator Howard |
 | Heaven Can Wait (1978) Nuclear Reporter |
 | Riding with Death (1976) Leonard Driscoll |
 | The Hindenburg (1975) Luftwaffe Colonel |
 | Busting (1974) Mr. Weldman |
 | Don't Be Afraid of the Dark (1973) Tom Henderson |
 | The Lawyer (1970) Paul Harrison |
 | The Challengers (1970) Brad York |
 | The Syndicate (1968) Burt Hickey |
 | The Hand of Night (1968) Paul Carver |
 | Red and Blue (1968) Trumpeter |
 | 2001: A Space Odyssey (1968) Dr. Heywood Floyd |
 | Devils of Darkness (1965) Paul Baxter |
 | Devil Doll (1964) Mark English |
 | Ring of Spies (1964) Gordon Lonsdale |
 | Blind Corner (1964) Paul Gregory |
 | Incident at Midnight (1963) Vince Warren |
 | Information Received (1961) Rick Hogan |
 | Gorgo (1961) Sam Slade |
 | Offbeat (1961) Layton / Steve Ross |
 | Whirlpool (1959) Hermann |
 | The Caine Mutiny Court-Martial (1958) |
 | Dublin Nightmare (1958) John Kevin |
 | High Tide at Noon (1957) Alec Douglas |
 | Portrait of Alison (1955) Dave Forrester |
 | The Stranger Came Home (1954) Philip Vickers |
 | What Every Woman Wants (1954) Jim Barnes |
 | Albert R.N. (1953) Texas |
 | House of Blackmail (1953) Jimmy |
 | Appointment in London (1953) Mac |
 | The Yellow Balloon (1953) Len Turner |
 | They Were Not Divided (1950) American Soldier (uncredited) |
 | Give Us This Day (1949) Giovanni |