Filmography
| Year | Title | Role |
| 1999 | Mumford | Unsolved mysteries host |
| 1996 | Beavis & Butt-head Do America | ATF Agent Flemming |
| 1990 | Joe Versus the Volcano | Dr. Ellison |
| 1988 | Plain Clothes | Mr. Gardner |
| 1987 | Korea: The Forgotten War | Narrator |
| 1986 | Big Trouble (1986) | Winslow |
| 1986 | The Transformers: The Movie | Ultra Magnus |
| 1980 | Airplane! | Captain Rex Kramer |
| 1979 | 1941 | Major General Joseph W. Stillwell |
| 1978 | Un Second Souffle | François Davis |
| 1976 | Most Wanted (1976) | Lincoln Evers |
| 1975 | Adventures of the Queen | Capt. James Morgan |
| 1970 | Battle at Gannon's Bridge | Dan Farrell |
| 1967 | Asylum for a Spy | James Andrew Congers |
| 1966 | Is Paris Burning? | Brig. General Wm L. Sibert |
| 1961 | Alcatraz Express | Eliot Ness |
| 1960 | The Last Voyage | Cliff Henderson |
| 1959 | John Paul Jones | John Paul Jones |
| 1957 | The Tarnished Angels | Roger Shumann |
| 1956 | Written on the Wind | Kyle Hadley |
| 1956 | Great Day in the Morning | Owen Pentecost |
| 1955 | House of Bamboo | Eddie Kenner/Spanier |
| 1955 | Good Morning, Miss Dove | Dr. Thomas `'Tom'` Baker |
| 1954 | The High and the Mighty | John Sullivan |
| 1951 | My Outlaw Brother | Patrick O'Moore |
| 1950 | The Bullfighter and the Lady | Johnny Regan |
| 1948 | A Date With Judy | Stephen Andrews |
| 1942 | To Be or Not to Be (1942) | Lt. Stanislav Sobinski |
| 1941 | Nice Girl? | Don Webb |
| 1941 | Badlands of Dakota | Jim Holliday |
| 1940 | The Mortal Storm | Otto von Rohn |
| 1939 | First Love (1939) | Ted Drake |
