| — | NBC Experiment in Television | voice |
| 2022 | Dracula Unearthed | Dr. Jack Seward (archive footage) |
| 2010 | Pesadilla en Elm Street: Desde dentro | Self (archive footage) |
| 2010 | Halloween: Desde dentro | Self (archive footage) |
| 2003 | Halloween: A Cut Above the Rest | Self / Dr. Samuel 'Sam' Loomis (archive footage) |
| 2002 | Best Ever Bond | Blofeld (archive footage) (uncredited) |
| 1998 | In and Out of Fashion | Self (archive footage) |
| 1996 | Fatal Frames - Fotogrammi mortali | Professor Robinson |
| 1995 | Halloween: La maldición de Michael Myers (Halloween 6) | Dr. Sam Loomis |
| 1995 | Safe Haven | The Sailor |
| 1995 | Signs and Wonders | Cornelius Van Damm |
| 1994 | Guinevere | Merlin |
| 1994 | Freeze: But is it Art? | Sinister Dentist |
| 1993 | El ladrón de Bagdad | Phido the Vulture (voice) |
| 1993 | The Hour of the Pig | Pincheon |
| 1993 | The Big Freeze | Soup slurper |
| 1993 | Femme Fatale | Victor Harty |
| 1992 | Diên Biên Phu | Howard Simpson |
| 1991 | Sombras y niebla | Doctor |
| 1991 | Miliardi | Ripa |
| 1991 | L'avvoltoio può attendere | The Art Collector |
| 1991 | Donne armate | Dreyfuss |
| 1990 | Moi, général de Gaulle | Winston Churchill |
| 1989 | Halloween 5: La venganza de Michael Myers | Dr. Sam Loomis |
| 1989 | Paganini Horror | Mr. Pickett |
| 1989 | Muerte en el safari | Mr. Justice Lawrence Wargrave |
| 1989 | El río de la muerte | Heinrich Spaatz |
| 1989 | Miss Marple: A Caribbean Mystery | Jason Rafiel |
| 1989 | Emparedada | Dr. Schaeffer |
| 1989 | American risciò | Rev. Mortom |
| 1989 | The House of Usher | Walter Usher |
| 1989 | Casablanca Express | Colonel Bats |
| 1988 | Halloween 4: El regreso de Michael Myers | Dr. Sam Loomis |
| 1988 | Nosferatu en Venecia | Don Alvise |
| 1988 | Bestia asesina | Inspector Datti |
| 1988 | Comando suicida | Henry Carlson |
| 1988 | La gran evasión II: la historia jamás contada | Dr. Absalon |
| 1988 | Animales metropolitanos | Prof. Livingstone |
| 1988 | Last Platoon | Colonel B. Abrahams |
| 1988 | Héroes inocentes | Captain Thomas Rosza |
| 1988 | The Great Escape II: The Untold Story | Dr. Absalon |
| 1987 | El príncipe de las tinieblas | Father Loomis |
| 1987 | El retorno del héroe | Ben Gunn |
| 1987 | La reina guerrera | Clodius Flaucus |
| 1987 | Espectros | Professor Lasky |
| 1987 | Los héroes jamás se rinden | Sen. Blaster |
| 1987 | Zona cero, alerta nuclear | Prosper Gaffney |
| 1987 | Basements | Mr. Kidd (segment "The Room") |
| 1987 | Scoop | Lord Copper |
| 1987 | Gila and Rik | Joe Gardenia |
| 1986 | To Kill a Stranger | Col. Kostik |
| 1986 | Cobra Mission | Father Lenoir |
| 1986 | Into the Darkness | David Beckett |
| 1986 | Onora il Padre | Aldo Rossi |
| 1986 | Naso di cane | Olindo Cuomo |
| 1985 | Phenomena | Professor John McGregor |
| 1985 | Bajo el vestido, nada | Commissioner Danesi |
| 1985 | The Ray Bradbury Theater | George Hill |
| 1985 | El tesoro de la selva perdida | Klaus von Blantz |
| 1985 | Embajador en Oriente Medio | Minister Eretz |
| 1985 | Arco de Triunfo | Ivon Haake |
| 1985 | Il mondo dell'orrore di Dario Argento | Self (Archive) |
| 1985 | Reel Horror | Axel MacGregor (archive footage) |
| 1985 | La Flecha Negra | Sir Oliver Oates |
| 1985 | The Corsican Brothers | The Chancellor |
| 1984 | Terror en el patio de butacas | Self - Host |
| 1984 | En busca del águila | J.P. Whittier |
| 1984 | Frankenstein's Great Aunt Tillie | Victor Frankenstein / Baron Frankenstein |
| 1984 | El amo del juego | Salomon Van der Merwe |
| 1984 | ¿Dónde está Parsifal? | Mackintosh |
| 1984 | Miss Marple | Jason Rafiel |
| 1983 | El guerrero del mundo perdido | Prossor |
| 1983 | Terror en Devonsville | Dr. Warley |
| 1983 | The Falklands Factor | Dr. Samuel Johnson |
| 1982 | Solos en la oscuridad | Leo Bain |
| 1982 | Witness for the Prosecution | Mr. Myers |
| 1982 | Wogan | Self |
| 1982 | The Barchester Chronicles | |
| 1982 | Computercide | George Dettler |
| 1981 | 1997: Rescate en Nueva York | President of the United States |
| 1981 | Halloween II: Sanguinario | Dr. Sam Loomis |
| 1981 | El club de los monstruos | Pickering, Chief of the B-Squad |
| 1981 | En busca del avión perdido | Gilbert Carson |
| 1980 | El hombre puma | Kobras |
| 1980 | Blade on the Feather | Professor John Cavendish |
| 1979 | Drácula | Dr. Jack Seward |
| 1979 | Sin novedad en el frente | Kantorek |
| 1979 | Laberinto | Albert Rumpelmayer |
| 1979 | Buena suerte, Miss Wyckoff | Dr. Steiner |
| 1979 | El felino | General Villanova |
| 1979 | Mrs. Columbo | |
| 1979 | Dick Turpin | |
| 1979 | El oro de las amazonas | Clarence Blasko |
| 1979 | The French Atlantic Affair | Max Dechambre |
| 1979 | Better Late Than Never | Colonel Riddle |
| 1978 | La noche de Halloween | Dr. Sam Loomis |
| 1978 | Sgt. Pepper's Lonely Hearts Club Band | B.D. Brockhurst |
| 1978 | Centennial | Sam Purchas |
| 1978 | Laberinto mortal | James Doniac |
| 1978 | Asalto al poder | Blair |
| 1978 | Mañana no amanecerá (Tensión al amanecer) | Dr. Todd |
| 1978 | The Dark Secret of Harvest Home | Narrator (voice) |
| 1978 | Night Creature | Axel MacGregor |
| 1978 | L'Ordre et la sécurité du monde | Rothko |
| 1978 | El bastardo | Solomon Sholto |
| 1978 | The Defection of Simas Kudirka | Capt. Vladimir Popov |
| 1977 | Jesús de Nazaret | Melchior |
| 1977 | Oh, God! | Doctor Harmon |
| 1977 | Teléfono | Nicolai Dalchimsky |
| 1977 | Lo Oculto | Valentine De'ath (segment 3 "Hollywood 1936") |
| 1976 | Ha llegado el águila | Himmler |
| 1976 | El último magnate | Boxley |
| 1976 | Poseidos por el demonio | Father Roche |
| 1976 | Poseído al nacer | Dr. Finch |
| 1976 | The Passover Plot | Pontius Pilate |
| 1976 | Trial by Combat | Sir Giles Marley |
| 1976 | Goldenrod | John Tyler Jones |
| 1976 | Meriel the Ghost Girl | George Livingston |
| 1976 | Hindle Wakes | Nat Jeffcote |
| 1976 | Laurence Olivier Presents | Nat Jeffcote |
| 1975 | Saturday Night Live | Self - Host |
| 1975 | La montaña embrujada | Lucas Deranian |
| 1975 | El conde de Montecristo | Danglars |
| 1975 | Aquel loco loco Oeste | A.J. Nietz |
| 1975 | Journey into Fear | Kuvetli |
| 1975 | Peep Show | |
| 1974 | ...Y si no, nos enfadamos | Doctor |
| 1974 | Cuentos de ultratumba | Jim Underwood |
| 1974 | El molino negro | Cedric Harper |
| 1974 | Mutación criminal | Professor Nolter |
| 1974 | Barry McKenzie Holds His Own | Erich Count von Plasma |
| 1974 | La loba y la Paloma | Martin Zayas |
| 1974 | Playhouse | |
| 1974 | Playhouse | George Livingston |
| 1974 | Occupations | Christo Kabak |
| 1973 | Las orgías de la locura | Prof. R.C. Tremayne |
| 1973 | Malachi's Cove | Malachi |
| 1973 | Dr. Jekyll y Mr. Hyde | Fred Smudge |
| 1973 | Orson Welles' Great Mysteries | Cawser |
| 1973 | Lonely Water | The Spirit (voice) |
| 1973 | The Rainbow Boys | Ralph Logan |
| 1972 | Subhumanos | Inspector Calhoun |
| 1972 | The Pied Piper | The Baron |
| 1972 | Henry VIII and His Six Wives | Thomas Cromwell |
| 1972 | Wedding in White | Jim Dougall, Sr. |
| 1972 | De Oriente a Occidente para matar | Loomis |
| 1972 | The Jerusalem File | |
| 1971 | THX 1138 | SEN |
| 1971 | Colombo | Adrian Carsini |
| 1971 | Despertar en el infierno | Doc Tydon |
| 1971 | David y Catriona | Ebenezer Balfour |
| 1971 | The Rivals of Sherlock Holmes | Carnacki |
| 1971 | Skin Deep | Gerry Muddiman |
| 1971 | The Fox Trot | Tom |
| 1970 | Soldado azul | Isaac Q. Cumber |
| 1970 | Play for Today | Samuel Johnson |
| 1970 | Play for Today | Gerry Muddiman |
| 1969 | Mr. Freedom | Dr. Freedom |
| 1969 | La loca de Chaillot | The Prospector |
| 1969 | Arthur? Arthur! | Arthur Brownjohn / Sir Easonby 'E' Mellon |
| 1969 | Last to Go | |
| 1968 | Hawaii 5-0 | Hans Vogler |
| 1968 | Creature of Comfort | James Thorne |
| 1968 | Sleep is Lovely | Clive |
| 1968 | The News-Benders | J.G. |
| 1967 | Sólo se vive dos veces | Ernst Stavro Blofeld |
| 1967 | La noche de los generales | General Kahlenberge |
| 1967 | El más valiente entre mil | Preacher Quint |
| 1967 | Sin Rival | Gregori Andreanu |
| 1967 | The Diary of Anne Frank | Albert Dussel |
| 1967 | Call Me Daddy | Ben Hoffman |
| 1966 | Viaje alucinante | Dr. Michaels |
| 1966 | Callejón sin salida | George |
| 1966 | Ojo del diablo | Pere Dominic |
| 1965 | La historia más grande jamás contada | The Dark Hermit - Satan |
| 1965 | La batalla de las colinas del whisky | 'Oracle' Jones |
| 1965 | Thirty-Minute Theatre | |
| 1964 | The Caretaker | Mac Davies / Bernard Jenkins |
| 1963 | La gran evasión | Blythe 'The Forger' |
| 1963 | Más allá del límite | Harold J. Finley |
| 1963 | El fugitivo | Max Pfeiffer |
| 1963 | Dr. Crippen | Dr. Hawley Harvey Crippen |
| 1963 | Espionage | |
| 1962 | The Inspector | Wolters |
| 1961 | What a Carve Up! | Everett Sloane |
| 1961 | Los defensores | Dr. Byron Saul |
| 1961 | No Love for Johnnie | Renfrew |
| 1961 | Spare the Rod | Mr. Jenkins |
| 1961 | The Horsemasters | Captain Pinski |
| 1961 | The Wind of Change | Pop |
| 1960 | Circo de los horrores | Vanet |
| 1960 | La carne y el demonio | William Hare |
| 1960 | Hijos y amantes | Mr. Pappleworth |
| 1960 | Hell Is a City | Gus Hawkins |
| 1960 | La batalla de los sexos | Irwin Hoffman |
| 1960 | Danger Man | |
| 1960 | Sospechosos | Parsons, alias Bill Brown |
| 1960 | Las manos de Orlac | Graham Coates |
| 1960 | The Shakedown | Jessel Brown |
| 1960 | La historia de David | Nabal |
| 1960 | The Big Day | Victor Partridge |
| 1960 | The Cupboard | Fred Watson |
| 1960 | Toff and Fingers | Self/Host |
| 1960 | Alice Through the Looking Box | Caterpillar |
| 1960 | Armchair Mystery Theatre | Host |
| 1959 | La dimensión desconocida | Ellis Fowler |
| 1959 | Mirando hacia atrás con ira | Hurst |
| 1959 | Un paso al más allá | Harvey Laurence |
| 1959 | Los asesinos del Kilimanjaro | Captain |
| 1959 | Interpol Calling | Karl Haussman |
| 1959 | The Traitor | Grantley Caypor |
| 1958 | Historia de dos ciudades | Barsad |
| 1958 | El espía de dos cabezas | Gen. Hardt |
| 1958 | El viento no sabe leer | Doctor |
| 1958 | Conflicto íntimo | Organ Grinder |
| 1958 | The Adventures of William Tell | |
| 1958 | Heart of a Child | Spiel |
| 1958 | The Greatest Man in the World | US President |
| 1957 | Barnacle Bill | Cashier |
| 1957 | The Man in the Sky | Crabtree |
| 1957 | Manuela | Evans |
| 1956 | 1984 | R. Parsons |
| 1956 | Premios Tony | Self - Nominee |
| 1956 | La tienda negra | Ali |
| 1956 | Armchair Theatre | President of the USA |
| 1955 | The Adventures of Robin Hood | Prince John |
| 1955 | Value for Money | Limpy |
| 1955 | Round the World in 80 Days | Voices |
| 1954 | Nineteen Eighty-Four | Syme |
| 1954 | The Wonderful World of Disney | Captain Pinski |
| 1954 | Orders Are Orders | Cpl. Martin (as Donald Plesance) |
| 1954 | The Beachcomber | Tromp |
| 1952 | The Dybbuk | Second batlon |
| 1951 | Hallmark Hall of Fame | Kantorek |
| 1951 | Hallmark Hall of Fame | Myers |
| 1951 | Hallmark Hall of Fame | The Chancellor |
| 1950 | Sunday Night Theatre | Syme |
