| — | NBC Experiment in Television | voice |
| 2022 | Dracula Unearthed | Dr. Jack Seward (archive footage) |
| 2010 | Never Sleep Again: The Elm Street Legacy | Self (archive footage) |
| 2010 | Halloween: The Inside Story | 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 - Okkulte Morde | Professor Robinson |
| 1995 | Halloween VI - Der Fluch des Michael Myers | 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 | The Thief and the Cobbler | Phido the Vulture (voice) |
| 1993 | Pesthauch des Bösen | Pincheon |
| 1993 | The Big Freeze | Soup slurper |
| 1993 | Femme Fatale | Victor Harty |
| 1992 | Diên Biên Phú – Symphonie des Untergangs | Howard Simpson |
| 1991 | Schatten und Nebel | Doctor |
| 1991 | Millions - Der Clan der Milliardäre | Ripa |
| 1991 | Die Geier warten schon | The Art Collector |
| 1991 | Donne armate | Dreyfuss |
| 1990 | Moi, général de Gaulle | Winston Churchill |
| 1989 | Halloween V - Die Rache des Michael Myers | Dr. Sam Loomis |
| 1989 | Paganini Horror - Der Blutgeiger von Venedig | Mr. Pickett |
| 1989 | Death on Safari - Todesfalle Afrika | Mr. Justice Lawrence Wargrave |
| 1989 | River of Death - Fluss des Grauens | Heinrich Spaatz |
| 1989 | Karibische Affäre | Jason Rafiel |
| 1989 | Lost Girls - Verloren in der Dunkelheit | Dr. Schaeffer |
| 1989 | American Rikscha | Rev. Mortom |
| 1989 | The House of Usher | Walter Usher |
| 1989 | Casablanca Express | Colonel Bats |
| 1988 | Halloween IV - Michael Myers kehrt zurück | Dr. Sam Loomis |
| 1988 | Nosferatu in Venedig | Don Alvise |
| 1988 | Off Balance – der Tod wartet in Venedig | Inspector Datti |
| 1988 | Der Commander | Henry Carlson |
| 1988 | Gesprengte Ketten – Die Rache der Gefangenen | Dr. Absalon |
| 1988 | Animali metropolitani | Prof. Livingstone |
| 1988 | Bye Bye Vietnam-Last Platoon | Colonel B. Abrahams |
| 1988 | Hanna's War | Captain Thomas Rosza |
| 1988 | Gesprengte Ketten - Die Rache der Opfer | Dr. Absalon |
| 1987 | Die Fürsten der Dunkelheit | Father Loomis |
| 1987 | Djangos Rückkehr | Ben Gunn |
| 1987 | Warrior Queen | Clodius Flaucus |
| 1987 | Specters - Mächte des Bösen | Professor Lasky |
| 1987 | Der Kampfgigant | Sen. Blaster |
| 1987 | Kreis der Angst | Prosper Gaffney |
| 1987 | Basements | Mr. Kidd (segment "The Room") |
| 1987 | Scoop | Lord Copper |
| 1987 | Gila and Rik | Joe Gardenia |
| 1986 | Missing and Killed - Der Massenmörder | Col. Kostik |
| 1986 | Die Rückkehr der Wildgänse | 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 | The Last Shot | Commissioner Danesi |
| 1985 | The Ray Bradbury Theater | George Hill |
| 1985 | Das Geheimnis der blauen Diamanten | Klaus von Blantz |
| 1985 | Der Ambassador | Minister Eretz |
| 1985 | Im Schatten des Triumphbogens | Ivon Haake |
| 1985 | Dario Argento's World of Horror | Self (Archive) |
| 1985 | Reel Horror | Axel MacGregor (archive footage) |
| 1985 | Black Arrow | Sir Oliver Oates |
| 1985 | The Corsican Brothers | The Chancellor |
| 1984 | Terror im Parkett | Self - Host |
| 1984 | Die Brut des Adlers | J.P. Whittier |
| 1984 | Frankenstein's Great Aunt Tillie | Victor Frankenstein / Baron Frankenstein |
| 1984 | 100 Karat – Die Diamanten-Dynastie | Salomon Van der Merwe |
| 1984 | Where Is Parsifal? | Mackintosh |
| 1984 | Miss Marple | Jason Rafiel |
| 1983 | The Last Warrior | Prossor |
| 1983 | Totentanz der Hexen | Dr. Warley |
| 1983 | The Falklands Factor | Dr. Samuel Johnson |
| 1982 | Zwei Stunden vor Mitternacht | Leo Bain |
| 1982 | Zeugin der Anklage | Mr. Myers |
| 1982 | Wogan | Self |
| 1982 | The Barchester Chronicles | |
| 1982 | Computercide | George Dettler |
| 1981 | Die Klapperschlange | President of the United States |
| 1981 | Halloween II - Das Grauen kehrt zurück | Dr. Sam Loomis |
| 1981 | The Monster Club | Pickering, Chief of the B-Squad |
| 1981 | Ein Teufelskerl | Gilbert Carson |
| 1980 | Der Puma-Man | Kobras |
| 1980 | Blade on the Feather | Professor John Cavendish |
| 1979 | Dracula | Dr. Jack Seward |
| 1979 | Im Westen nichts Neues | Kantorek |
| 1979 | Ein Mann in Wut | Albert Rumpelmayer |
| 1979 | Good Luck, Miss Wyckoff | Dr. Steiner |
| 1979 | Jaguar lebt | General Villanova |
| 1979 | Mrs. Columbo | |
| 1979 | Die Abenteuer des Dick Turpin | |
| 1979 | Weiße Sklavin der grünen Hölle | Clarence Blasko |
| 1979 | Victor Charlie ruft Lima Sierra | Max Dechambre |
| 1979 | Better Late Than Never | Colonel Riddle |
| 1978 | Halloween - Die Nacht des Grauens | Dr. Sam Loomis |
| 1978 | Sgt. Pepper's Lonely Hearts Club Band | B.D. Brockhurst |
| 1978 | Colorado Saga | Sam Purchas |
| 1978 | Blutsverwandte | James Doniac |
| 1978 | Power Play | Blair |
| 1978 | Morgen gibt es kein Erwachen | 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 | The Bastard | Solomon Sholto |
| 1978 | The Defection of Simas Kudirka | Capt. Vladimir Popov |
| 1977 | Jesus von Nazareth | Melchior |
| 1977 | Oh Gott … | Doctor Harmon |
| 1977 | Telefon | Nicolai Dalchimsky |
| 1977 | Das Unheimliche | Valentine De'ath (segment 3 "Hollywood 1936") |
| 1976 | Der Adler ist gelandet | Himmler |
| 1976 | Der letzte Tycoon | Boxley |
| 1976 | The Devil's Men | Father Roche |
| 1976 | Der Teufel in ihr | Dr. Finch |
| 1976 | Jesus von Nazareth | 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 | Die Flucht zum Hexenberg | Lucas Deranian |
| 1975 | Der Graf von Monte Christo | Danglars |
| 1975 | Ins Herz des wilden Westens | A.J. Nietz |
| 1975 | Flucht in die Angst | Kuvetli |
| 1975 | Peep Show | |
| 1974 | Zwei wie Pech und Schwefel | Doctor |
| 1974 | Die Tür ins Jenseits | Jim Underwood |
| 1974 | Die schwarze Windmühle | Cedric Harper |
| 1974 | Das Labor des Grauens | 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 | Geschichten, die zum Wahnsinn führen | Prof. R.C. Tremayne |
| 1973 | Malachi's Cove | Malachi |
| 1973 | Dr. Jekyll und Mr. Hyde | Fred Smudge |
| 1973 | Orson Welles erzählt | Cawser |
| 1973 | Lonely Water | The Spirit (voice) |
| 1973 | The Rainbow Boys | Ralph Logan |
| 1972 | Tunnel der lebenden Leichen | Inspector Calhoun |
| 1972 | Der Rattenfänger von Hameln | The Baron |
| 1972 | Heinrich VIII und seine sechs Frauen | Thomas Cromwell |
| 1972 | Wedding in White | Jim Dougall, Sr. |
| 1972 | Wer zuletzt lebt, lebt am besten | Loomis |
| 1972 | The Jerusalem File | |
| 1971 | THX 1138 | SEN |
| 1971 | Columbo | Adrian Carsini |
| 1971 | Ferien in der Hölle | Doc Tydon |
| 1971 | Die Entführung des David Balfour | Ebenezer Balfour |
| 1971 | Die Rivalen von Sherlock Holmes | Carnacki |
| 1971 | Skin Deep | Gerry Muddiman |
| 1971 | The Fox Trot | Tom |
| 1970 | Das Wiegenlied vom Totschlag | Isaac Q. Cumber |
| 1970 | Play for Today | Samuel Johnson |
| 1970 | Play for Today | Gerry Muddiman |
| 1969 | Mr. Freedom | Dr. Freedom |
| 1969 | Die Irre von Chaillot | The Prospector |
| 1969 | Arthur? Arthur! | Arthur Brownjohn / Sir Easonby 'E' Mellon |
| 1969 | Last to Go | |
| 1968 | Hawaii Fünf-Null | Hans Vogler |
| 1968 | Creature of Comfort | James Thorne |
| 1968 | Sleep is Lovely | Clive |
| 1968 | The News-Benders | J.G. |
| 1967 | James Bond 007 - Man lebt nur zweimal | Ernst Stavro Blofeld |
| 1967 | Die Nacht der Generale | General Kahlenberge |
| 1967 | Der Verwegene | Preacher Quint |
| 1967 | Matchless - Der unsichtbare Spion | Gregori Andreanu |
| 1967 | Das Tagebuch der Anne Frank | Albert Dussel |
| 1967 | Call Me Daddy | Ben Hoffman |
| 1966 | Die Phantastische Reise | Dr. Michaels |
| 1966 | Wenn Katelbach kommt | George |
| 1966 | Die schwarze 13 | Pere Dominic |
| 1965 | Die größte Geschichte aller Zeiten | The Dark Hermit - Satan |
| 1965 | Vierzig Wagen westwärts | 'Oracle' Jones |
| 1965 | Thirty-Minute Theatre | |
| 1964 | Der Hausmeister | Mac Davies / Bernard Jenkins |
| 1963 | Gesprengte Ketten | Blythe 'The Forger' |
| 1963 | The Outer Limits | Harold J. Finley |
| 1963 | Auf der Flucht | Max Pfeiffer |
| 1963 | Dr. Crippen | Dr. Hawley Harvey Crippen |
| 1963 | Espionage | |
| 1962 | Der Inspektor | Wolters |
| 1961 | What a Carve Up! | Everett Sloane |
| 1961 | Preston & Preston | 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 | Der rote Schatten | Vanet |
| 1960 | Der Arzt und die Teufel | William Hare |
| 1960 | Söhne und Liebhaber | Mr. Pappleworth |
| 1960 | Hetzjagd | Gus Hawkins |
| 1960 | Mr. Miller ist kein Killer | Irwin Hoffman |
| 1960 | Geheimauftrag für John Drake | |
| 1960 | Suspect | Parsons, alias Bill Brown |
| 1960 | Die unheimlichen Hände des Dr. Orlak | Graham Coates |
| 1960 | The Shakedown | Jessel Brown |
| 1960 | David und König Saul | 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 | Twilight Zone - Unwahrscheinliche Geschichten | Ellis Fowler |
| 1959 | Blick zurück im Zorn | Hurst |
| 1959 | One Step Beyond | Harvey Laurence |
| 1959 | Rivalen unter heißer Sonne | Captain |
| 1959 | Interpol Calling | Karl Haussman |
| 1959 | The Traitor | Grantley Caypor |
| 1958 | Zwei Städte | Barsad |
| 1958 | The Two-Headed Spy | Gen. Hardt |
| 1958 | ...denn der Wind kann nicht lesen | Doctor |
| 1958 | Der Mann ohne Nerven | Organ Grinder |
| 1958 | Die Abenteuer von William Tell | |
| 1958 | Heart of a Child | Spiel |
| 1958 | The Greatest Man in the World | US President |
| 1957 | Kapitän Seekrank | Cashier |
| 1957 | The Man in the Sky | Crabtree |
| 1957 | Manuela | Evans |
| 1956 | 1984 | R. Parsons |
| 1956 | Tony Awards | Self - Nominee |
| 1956 | The Black Tent | Ali |
| 1956 | Armchair Theatre | President of the USA |
| 1955 | Die Abenteuer des Robin Hood | Prince John |
| 1955 | Lieber reich - aber glücklich | 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 |
