Filmography
| Year | Title | Role |
| 1980 | Heaven's Gate | The Reverend Doctor |
| 1980 | The Survivor | Priest |
| 1979 | Perfect Crime | Sir Arthur Dundee |
| 1978 | Island of the Fishmen | Prof. Ernest Marvin |
| 1977 | Airport '77 | Nicholas St. Downs III |
| 1977 | Timber Tramps | Greedy sawmill mogul |
| 1976 | The Lindbergh Kidnapping Case | Dr. Joseph Francis Condon |
| 1973 | Soylent Green | William |
| 1973 | A Delicate Balance (1973) | Harry |
| 1973 | F for Fake | Special Participant |
| 1972 | Baron Blood | Baron Otto von Kleist/Alfred Becker |
| 1972 | Lo Scopone Scientifico | George |
| 1971 | Lady Frankenstein | Baron Frankenstein |
| 1971 | The Abominable Dr. Phibes | Dr. Vesalius |
| 1970 | Tora! Tora! Tora! | Secretary of War Henry L. Stimson |
| 1970 | Assault on the Wayne | Admiral |
| 1970 | The Grasshopper | Richard Morgan |
| 1970 | Latitude Zero | Capt. Craig McKenzie/Cmdr. Glenn McKenzie |
| 1967 | Brighty of the Grand Canyon | Jim Owen |
| 1967 | The Hellbenders | Col. Jonas |
| 1966 | The Oscar (1966) | Kenneth Regan |
| 1965 | Hush... Hush, Sweet Charlotte | Drew |
| 1965 | The Great Sioux Massacre | Major Reno |
| 1961 | The Last Sunset | John Breckenridge |
| 1958 | Touch of Evil | Coroner (uncredited) |
| 1958 | From the Earth to the Moon | Victor Barbicane |
| 1957 | Halliday Brand | Daniel Halliday |
| 1956 | The Killer Is Loose | Det. Sam Wagner |
| 1956 | The Bottom of the Bottle | Pat "P.M." Martin |
| 1953 | Niagara | George Loomis |
| 1953 | A Blueprint for Murder | Whitney `'Cam'` Cameron |
| 1952 | The Merchant of Venice (1980) | Senator |
| 1952 | The Steel Trap | Jim Osborne |
| 1950 | Walk Softly, Stranger | Chris Hale |
| 1949 | Under Capricorn | Sam Flusky |
| 1949 | Beyond the Forest | Doctor Louis Moline |
| 1949 | Le troisième homme | Holly Martins |
| 1948 | Portrait of Jennie | Eben Adams |
| 1947 | The Farmer's Daughter | Glenn Morley |
| 1946 | Duel in the Sun | Jesse McCanles |
| 1944 | Gaslight | Brian Cameron |
| 1944 | Since You Went Away | JLt. Tony Willett |
| 1944 | I'll Be Seeing You | Zachary Morgan |
| 1943 | Shadow of a Doubt (1943) | Charlie Oakley |
| 1943 | Hers to Hold | Bill Morley |
| 1942 | The Magnificent Ambersons | Eugene |
| 1942 | Confidential Report / Journey Into Fear | Howard Graham |
| 1941 | Citizen Kane | Jedediah Leland/Newsreel Reporter |
| 1938 | Too Much Johnson | Augustus Billings |
