Filmography
| Year | Title | Role |
| 1984 | Top Secret! | Sven Jorgensen, the Sweden Bookstore Owner/Resistance Member |
| 1984 | Sword of the Valiant (1984) | Seneschal - Gaspar |
| 1979 | Arabian Adventure | Wazir Al Wuzara |
| 1977 | Shock Waves | SS Commander |
| 1977 | Star Wars (1977) | Grand Moff Tarkin |
| 1977 | The Uncanny | Wilbur |
| 1976 | At the Earth's Core | Dr. Abner Perry |
| 1976 | The Great Houdinis | Sir Arthur Conan Doyle |
| 1974 | Frankenstein and the Monster From Hell | Baron Victor Frankenstein aka Dr. Carl Victor |
| 1974 | The Legend of the 7 Golden Vampires | Prof Van Helsing |
| 1974 | The Beast Must Die | Dr. Christopher Lundgren |
| 1974 | Madhouse | Herbert Flay |
| 1974 | Shatter (1974) | Paul Rattwood |
| 1973 | The Creeping Flesh | Emmanuel Hildern |
| 1973 | Count Dracula and His Vampire Bride | Prof. Lorrimer Van Helsing |
| 1973 | And Now the Screaming Starts | Dr. Pope |
| 1972 | Horror Express | Dr. Wells |
| 1972 | Asylum | Mr. Smith |
| 1972 | Tales from the Crypt | Arthur Edward Grimsdyke |
| 1972 | Dr. Phibes Strikes Again | Captain |
| 1972 | Fear in the Night (1972) | Michael Carmichael |
| 1972 | Dracula A.D. 1972 | Professor Van Helsing |
| 1971 | The House That Dripped Blood | Philip Grayson |
| 1971 | Twins of Evil | Gustav Weil |
| 1970 | The Vampire Lovers | General von Spielsdorf |
| 1970 | Scream and Scream Again | Major Heinrich Benedek |
| 1970 | Bloodsuckers | Dr. Walter Goodrich |
| 1969 | Frankenstein Must Be Destroyed | Baron Frankenstein |
| 1968 | Corruption | Sir John Rowan |
| 1968 | The Blood Beast Terror | Detective Inspector Quennell |
| 1967 | Torture Garden | Lancelot Canning |
| 1967 | Frankenstein Created Woman | Baron Frankenstein |
| 1967 | Island of the Burning Damned | Dr. Vernon Stone |
| 1966 | Island of Terror | Dr. Brian Stanley |
| 1966 | Daleks: Invasion Earth 2150 A.D. | Dr. Who |
| 1965 | Dr. Terror's House of Horrors | Dr. Sandor Schreck |
| 1965 | Dr. Who and the Daleks | Dr. Who |
| 1964 | The Gorgon | Dr. Namaroff |
| 1964 | The Evil of Frankenstein | Baron Frankenstein |
| 1962 | Cash on Demand | Harry Fordyce |
| 1960 | The Brides of Dracula | Dr. J. Van Helsing |
| 1959 | The Hound of the Baskervilles | Sherlock Holmes |
| 1959 | John Paul Jones | Captain Richard Pearson |
| 1959 | MUMMY 3/The Mummy 3 | John Banning |
| 1958 | Horror of Dracula | Doctor Van Helsing |
| 1958 | The Revenge of Frankenstein | Dr. Victor Frankenstein aka Dr. Victor Stein and Dr. Franck |
| 1957 | The Curse of Frankenstein | Victor Frankenstein |
| 1957 | The Abominable Snowman of the Himalayas | Dr. John Rollason |
| 1954 | The Black Knight | Sir Palamides |
| 1948 | Hamlet (1948) | Osric |
| 1940 | A Chump at Oxford | Student |
| 1940 | Laddie | Robert Pryor |
