| Broadway's Lost Treasures II (2004) Don Quixote (segment "Man Of La Mancha") |
| Hugh Hefner: American Playboy (2003) Narrator (voice) |
| The Men Who Made the Movies: Samuel Fuller (2002) Joey (archive footage) |
| Heroes of Horror (2001) Narrator |
| Blue Moon (1999) Jimmy Keating |
| Patch Adams (1998) Dr. Titan |
| The Gates of Jerusalem: A History of the Holy City (1998) Host |
| Wolves at Our Door (1997) Narrator |
| Vincent Price: The Versatile Villain (1997) Narrator |
| The Sonoran Desert: A Violent Eden (1997) Narrator (voice) |
| Tigers of the Snow (1997) Narrator (voice) |
| Audrey Hepburn: The Fairest Lady (1997) Narrator |
| Henry Fonda: Hollywood's Quiet Hero (1997) Self |
| Mary & Tim (1996) Ron Melville |
| Peter Lorre: The Master of Menace (1996) Self - Narrator (voice) |
| The Rockford Files: Punishment and Crime (1996) Frank Dougherty |
| Phenomenon (1996) Dr. Wellin |
| Lon Chaney: Son of a Thousand Faces (1995) Narrator |
| Darryl F. Zanuck: 20th Century Filmmaker (1995) Narrator |
| Secrets (1995) Dr. Will Berter |
| 30 Years of National Geographic Specials (1995) Self - Narrator |
| A Passion for Justice: The Hazel Brannon Smith Story (1994) Earl Clayburn |
| The Visual Bible: Matthew (1993) Matthew |
| Jurassic Park (1993) Jurassic Park Tour Voice (voice) |
| Mysteries Underground (1992) Self - Narrator |
| Mastergate (1992) Archer Bowman |
| Giant Bears of Kodiak Island (1992) Narrator |
| Absolute Strangers (1991) Dr. RJ Cannon |
| Separate But Equal (1991) Chief Justice Earl Warren |
| National Geographic: Splendid Stones (1991) Narrator |
| Gunsmoke: The Last Apache (1990) Chalk Brighton |
| Aladdin (1990) The Magician |
| The Final Days (1989) J. Fred Buzhardt |
| To The Limit (1989) Narrator |
| My First Love (1988) Sam Morrissey |
| Cary Grant: A Celebration of a Leading Man (1988) Narrator |
| Australia's Twilight Of The Dreamtime (1988) Narrator |
| Australia's Aborigines (1988) Narrator |
| National Geographic: White Wolf (1988) Narrator (voice) |
| Grace Kelly: The American Princess (1987) Narrator (voice) |
| Lions of the African Night (1987) |
| Treasures From The Past (1987) Himself - Narrator |
| Howard the Duck (1986) The Cosmos (voice) |
| The Adventures of Huckleberry Finn (1986) Col. Grangerford |
| Do You Remember Love (1985) George Hollis |
| The Bad Seed (1985) Richard Bravo |
| Ballad of the Irish Horse (1985) Narrator (voice) |
| The Canterville Ghost (1985) Sir Simon De Canterville |
| Night of 100 Stars (1982) Self |
| Pray TV (1982) Rev. Gus Keiffer |
| Isabel's Choice (1981) Lyman Jones |
| Golden Gate (1981) Thomas J. Kingsley |
| Endless Love (1981) Arthur |
| Some Call Them ... Freaks (1981) Host (Self) |
| Angel on My Shoulder (1980) Nick |
| The New Media Bible: The Gospel According to St. Luke (1979) Narrator/St. Luke |
| Looking for Mr. Goodbar (1977) Mr. Dunn |
| The Macahans (1976) Timothy Macahan |
| Friendly Persuasion (1975) Jess Birdwell |
| The Little Prince (1974) The Pilot |
| Jigsaw (1972) DA Dan Bellington |
| All the Way Home (1971) Jay Follet |
| Murder Once Removed (1971) Frank Manning |
| Incident in San Francisco (1971) Robert Harmon |
| a.k.a. Cassius Clay (1970) Himself |
| The Ceremony of Innocence (1970) King Ethelred |
| Night Gallery (1969) SS-Gruppenführer Helmut Arndt / Josef Strobe |
| Pendulum (1969) Woodrow Wilson King |
| The Power of the Resurrection (1958) Peter |
| Spanish Affair (1957) Merritt Blake |
| The Phenix City Story (1955) John Patterson |
| Blackboard Jungle (1955) Joshua Y. Edwards |
| Patterns (1955) Fred Staples |
| Pickup on South Street (1953) Joey |
| Eight Iron Men (1952) Pvt. Coke |
| The Sniper (1952) James G. Kent |
| The Mob (1951) Tom Clancy |
| National Geographic's Rain Forest Self - Narrator |