Actor (78 credits)
- The China Syndrome: Creating a Controversy (2004) играет самого себя
- Murder, She Wrote: The Celtic Riddle (2003) Eamon Byrne
- Never Die Twice (2001)
- The Deep End (2001) Jack Hall
- Red Corner (1997) David McAndrews
- The Game (1997) Samuel Sutherland
- Secrets of the X Files, Part 2 (1996) William Mulder, хроника, not listed in credits
- Seduced and Betrayed (1995) Judge Van Owen
- Dieppe (1993) McNaughton
- Time Trax (1993) Mordecai Sahmbi
- The X Files (1993) William Mulder
- The Babe (1992) Harry Frazee
- School Ties (1992) Headmaster Dr. Bartram
- Father Dowling Mysteries (1989) Thomas Douglas
- The War of the Roses (1989) Jason Larrabee
- Skin Deep (1989) Sparky
- Christine Cromwell (1989) Walker Garrison
- Tucker: The Man and His Dream (1988) Kerner
- The Hero's Journey: The World of Joseph Campbell (1987) играет самого себя - ведущий, voice acting
- Unfinished Business (1987) Ferenzy
- The Days and Nights of Molly Dodd (1987) Mr. Goodman
- Earth Star Voyager (1987) Admiral Beasley (1988)
- Lune de miel (1985) Novak
- The Bay Boy (1984) Will Campbell
- Massive Retaliation (1984) Lee Briscoe
- Hawaiian Heat (1984) Judge Harding
- Masquerade (1983)
- Ladies and Gentlemen, the Fabulous Stains (1982) Harley Dennis
- Mazes and Monsters (1982) Harold
- Voyagers! (1982) George Washington
- Highpoint (1982) Maronzella
- A Matter of Life and Death (1981) Dr. Whedon
- The Princess and the Cabbie (1981) Edward James
- Golden Gate (1981) Richard Bryne
- Flamingo Road (1980) Elmo Tyson
- Fun and Games (1980) Ted
- Salvage 1 (1979) Dawson
- The Suicide's Wife (1979) Wayne Harrington
- The China Syndrome (1979) Don Jacovich
- Hanging by a Thread (1979) Mr. Durant
- Mrs. Columbo (1979)
- Meteor (1979) Opening Sequence рассказчик, voice acting
- Return Engagement (1978) George Riley
- A Different Story (1978) Sills
- Mirrors (1978) Dr. Philip Godard
- Billy Jack Goes to Washington (1977) Ralph Butler
- Delta County, U.S.A. (1977) John McCain Jr.
- The Godfather: A Novel for Television (1977) Questadt
- Rafferty (1977) Victor Ehren
- Rich Man, Poor Man - Book II (1976) Arthur Raymond
- Baa Baa Black Sheep (1976) Col. Mathis
- Future Cop (1976) Herb Conroy
- The Lindbergh Kidnapping Case (1976) Col. H. Norman Schwarzkopf
- Sara (1976) Alan Yarnell
- Captains and the Kings (1976) Clair Montrose
- The Hindenburg (1975)
- Russian Roulette (1975) McDermott
- The Invisible Man (1975) Morgan Klae
- Last Hours Before Morning (1975) Peter Helms
- NBC Special Treat (1975) David
- Enemies (1974) Zakhar
- The Missiles of October (1974) David Ormsby-Gore, British Ambassador to U.S.
- The Godfather: Part II (1974) Questadt
- The Return of Charlie Chan (1973) Noel Adamson
- Banacek (1972) Robert Morgan
- Cyrano de Bergerac (1972) Cyrano de Bergerac
- My Old Man's Place (1971) Car Salesman
- Bracken's World (1969) Frank
- The Young Lawyers (1969) D.A. Lew Foley
- Der Revolver des Korporals (1967) Hilario
- Julius Caesar (1966) Marc Antony
- Wojeck (1966) Bob Eden
- The Last Voyage of Henry Hudson (1964) Henry Greene
- Startime (1959) Paul
- Lost Lagoon (1958) David Burnham
- The DuPont Show of the Month (1957)
- Camera Three (1955) Winterbourne
- Producers' Showcase (1954)
