Filmography
| Role | Title | Year | Character |
|---|---|---|---|
| Actor | Citizen Kane | 1941 | Jedediah Leland |
| Actor | Jahr 2022... die überleben wollen | 1973 | William R. Simonson |
| Actor | Der dritte Mann | 1949 | Holly Martins |
| Actor | Im Zeichen des Bösen | 1958 | Coroner |
| Actor | Das Haus der Lady Alquist | 1944 | Brian Cameron |
| Actor | Niagara | 1953 | George Loomis |
| Actor | Im Schatten des Zweifels | 1943 | Uncle Charlie Oakley |
| Actor | Tora! Tora! Tora! | 1970 | Henry L. Stimson, U.S. Secretary of War |
| Actor | Der Glanz des Hauses Amberson | 1942 | Eugene Morgan |
| Actor | Heaven's Gate | 1980 | The Reverend Doctor |
| Actor | Verschollen im Bermuda-Dreieck | 1977 | Nicholas St. Downs III |
| Actor | F wie Fälschung | 1973 | Himself |
| Actor | Wiegenlied für eine Leiche | 1964 | Dr. Drew Bayliss |
| Actor | Das Schreckenskabinett des Dr. Phibes | 1971 | Dr. Vesalius |
| Actor | Sklavin des Herzens | 1949 | Sam Flusky |
| Actor | Teuflisches Spiel | 1972 | George |
| Actor | Duell in der Sonne | 1946 | Jesse McCanles |
| Actor | Baron Blood | 1972 | Baron Otto von Kleist / Alfred Becker |
| Actor | Jenny | 1948 | Eben Adams |
| Actor | Flash Solo | 1975 | Paternò |
| Actor | El Perdido | 1961 | John Breckenridge |
| Actor | Die Farmerstochter | 1947 | Glenn Morley |
| Actor | Insel der neuen Monster | 1979 | Prof. Ernest Marvin |
| Actor | Als du Abschied nahmst | 1944 | Lieutenant Tony Willett |
| Actor | I'll Be Seeing You | 1944 | Zachary Morgan |
| Actor | Von Agenten gejagt | 1943 | |
| Writer | Von Agenten gejagt | 1943 | |
| Actor | Lady Frankenstein | 1971 | Baron Frankenstein |