 | Superman II: The Richard Donner Cut (2006) as The President |
 | Harvesting Horror: Children of the Corn (2004) as (archival footage) |
 | Walker Evans / America (2000) as Narrator |
 | The Defenders: Choice of Evils (1998) as Lawrence Preston |
 | The Defenders: Payback (1997) as Lawrence Preston |
 | Miss Evers' Boys (1997) as The Senate Chairman |
 | Absolute Power (1997) as Walter Sullivan |
 | Nixon (1995) as John Mitchell |
 | Oldest Living Confederate Widow Tells All (1994) as Professor Taw |
 | George Marshall and the American Century (1993) as Self - Narrator (voice) |
 | Tornadoes: The Entity (1993) as Narrator 1 |
 | Lincoln (1992) as Gideon Welles (voice) |
 | Consenting Adults (1992) as George Gordon |
 | Earth and the American Dream (1992) as Reader (voice) |
 | Russian Holiday (1992) as Joe Meadows |
 | Ironclads (1991) as Commdr. Smith |
 | Due occhi diabolici (1990) as Steven Pike |
 | National Lampoon's Christmas Vacation (1989) as Art |
 | Fire From the Sun: The Search for Fusion Energy (1989) as Host |
 | The Hijacking of the Achille Lauro (1989) as Stanley 'Stan' Kubacki |
 | An Empire of Reason (1988) as Federalist Spokesman |
 | The Explorers: A Century of Discovery (1988) |
 | La gran fiesta (1986) as Judge Cropper |
| | Ike (1986) as Dwight David Eisenhower |
 | Under Siege (1986) as Harold Sloan |
 | Power (1986) as Senator Sam Hastings |
 | My Chauffeur (1986) as Witherspoon |
 | The Winter of Our Discontent (1983) as Mr. Baker |
 | Saigon: Year of the Cat (1983) as The Ambassador |
 | Born of Fire (1983) as Narrator |
 | Thank You, Mr. President: The Press Conferences of JFK (1983) as Self - Host |
 | Creepshow (1982) as Upson Pratt (segment "They're Creeping Up On You") |
 | Eleanor, First Lady of the World (1982) as John Foster Dulles |
 | The Phoenix (1981) as Dr. Ward Frazier |
 | Superman II (1980) as The President |
 | Dive to the Edge of Creation (1980) as Self - Host |
 | Disaster on the Coastliner (1979) as Roy Snyder |
 | Vampire (1979) as Harry Kilcoyne |
 | The Lazarus Syndrome (1979) as Dr. Mendel |
| | HR 6161: An Act of Congress (1979) as Narrator |
 | Interiors (1978) as Arthur |
 | Billy Jack Goes to Washington (1977) as Sen. Joseph Paine |
 | Independence (1976) as Narrator |
 | Collision Course: Truman vs. MacArthur (1976) as President Harry S. Truman |
 | The Incredible Machine (1975) as Narrator |
 | The Abduction of Saint Anne (1975) as Bishop Francis Paul Logan |
 | Money to Burn (1973) as Jed Finnegan |
 | Pursuit (1972) as James Wright |
| | Look Homeward, Angel (1972) as W. O. Gant |
 | Ellery Queen: Don't Look Behind You (1971) as Dr. Cazalis |
 | The City (1971) as Sheridan Hugotor |
 | The Pursuit of Happiness (1971) as Daniel Lawrence |
 | A Clear and Present Danger (1970) as Senator Stowe |
 | Tora! Tora! Tora! (1970) as Colonel Rufus S. Bratton |
 | The Littlest Angel (1969) as God |
 | The Bridge at Remagen (1969) as Brig. Gen. Shinner |
| | A Case of Libel (1968) as Paul Cleary |
 | Paris brûle-t-il? (1966) as Intelligence Officer Powell (uncredited) |
 | The Poppy Is Also a Flower (1966) as Coley Jones |
 | The Chase (1966) as Val Rogers |
 | The Vote (1963) as Self - Host |
 | Town Without Pity (1961) as Colonel Pakenham |
 | The Master Builder (1960) as Solness |
 | Cash McCall (1960) as Winston Conway |
 | Compulsion (1959) as District Attorney Harold Horn |
 | The Journey (1959) as Harold Rhinelander |
 | The Buccaneer (1958) as Gov. William Claiborne |
 | The Plot to Kill Stalin (1958) as Beria |
 | Man on Fire (1957) as Sam Dunstock |
| | Clash by Night (1957) as Jerry D'Amato |
 | 12 Angry Men (1957) as Juror 4 |
 | The Bachelor Party (1957) as Walter |
 | The Little Foxes (1956) as Oscar |
 | The Mountain (1956) as Solange |
 | The Scarlet Hour (1956) as Lt. Jennings |
 | The Left Hand of God (1955) as Dr. David Sigman |
 | The Silver Chalice (1954) as Ignatius |
 | Broken Lance (1954) as Horace (The Governor) |
| | Middle of the Night (1954) as Jerry |
 | Pushover (1954) as Police Lt. Carl Eckstrom |
 | The Caine Mutiny (1954) as Lt. Comdr. Challee |
 | The Bamboo Prison (1954) as Father Francis Dolan |
 | Diplomatic Courier (1952) as Military Police Jeep Driver (uncredited) |
 | The Twentieth Century (1949) |
 | Call Northside 777 (1948) as Rayska (uncredited) |
 | Untamed Fury (1947) as Pompano, the dance caller |
 | Four Rooms: Earth View as Self |
