| The Verdict | 1982 | Ed Concannon | Movie |
| Ivanhoe | 1982 | Isaac of York | TV Movie |
| Socrates | 1982 | Socrates | TV Movie |
| The Search for Alexander the Great | 1981 | Narrator | TV Show |
| Ffolkes | 1980 | Admiral Brinsden | Movie |
| Bloodline | 1979 | Sir Alec Nichols | Movie |
| Murder by Decree | 1979 | Dr. Watson | Movie |
| The Passage | 1979 | Prof. John Bergson | Movie |
| Salem's Lot | 1979 | Richard K. Straker | TV Show |
| Heaven Can Wait | 1978 | Mr. Jordan | Movie |
| The Boys from Brazil | 1978 | Eduard Seibert | Movie |
| The Water Babies | 1978 | Mr. Grimes / Voice of Killer Shark | Movie |
| Cross of Iron | 1977 | Oberst (Col.) Brandt | Movie |
| Jesus of Nazareth | 1977 | Joseph of Arimathea | TV Show |
| Hot Stuff | 1976 | Prosecutor | Movie |
| Voyage of the Damned | 1976 | Dr. Juan Remos | Movie |
| Origins of the Mafia | 1976 | Vianisi | TV Show |
| Autobiography of a Princess | 1975 | Cyril Sahib | Movie |
| Inside Out | 1975 | Ernst Furben | Movie |
| Kidnap Syndicate | 1975 | Filippini | Movie |
| Mandingo | 1975 | Warren Maxwell | Movie |
| The Flower in His Mouth | 1975 | Avv. Antonio Bellocampo | Movie |
| La polizia interviene: ordine di uccidere | 1975 | Senator Leandri | Movie |
| 11 Harrowhouse | 1974 | Charles D. Watts | Movie |
| The Destructors | 1974 | Jacques Brizard | Movie |
| Great Expectations | 1974 | Magwitch | TV Movie |
| The Last of Sheila | 1973 | Philip | Movie |
| The MacKintosh Man | 1973 | Sir George Wheeler | Movie |
| Frankenstein: The True Story | 1973 | Dr. John Polidori | TV Movie |
| John Keats: His Life and Death | 1973 | Narrator (voice) | Movie |
| Child's Play | 1972 | Jerome Malley | Movie |
| Hunt the Man Down | 1971 | Francisco Paco Montero | Movie |
| Kill! Kill! Kill! Kill! | 1971 | Alan Hamilton | Movie |
| The Search for the Nile | 1971 | Narrator | TV Show |
| Appointment with Destiny | 1971 | Narrator | TV Show |
| Cold Sweat | 1970 | Capt. Ross | Movie |
| Spring and Port Wine | 1970 | Rafe Crompton | Movie |
| The Yin and the Yang of Mr. Go | 1970 | Y.Y. Go | Movie |
| Crepa padrone, crepa tranquillo | 1970 | | Movie |
| Age of Consent | 1969 | Bradley Morahan | Movie |
| Duffy | 1968 | J C Calvert | Movie |
| Mayerling | 1968 | Emperor Franz-Josef | Movie |
| The Sea Gull | 1968 | Trigorin, a Writer | Movie |
| The Legend of Silent Night | 1968 | Franz Gruber | TV Movie |
| Cop-Out | 1967 | John Sawyer | Movie |
| Georgy Girl | 1966 | James Leamington | Movie |
| The Blue Max | 1966 | General Count von Klugermann | Movie |
| The Deadly Affair | 1966 | Charles Dobbs | Movie |
| ABC Stage 67 | 1966 | Otto Hoffman | TV Show |
| Genghis Khan | 1965 | Kam Ling | Movie |
| Lord Jim | 1965 | Gentleman Brown | Movie |
| The Uninhibited | 1965 | Pascal Regnier | Movie |
| The Fall of the Roman Empire | 1964 | Timonides | Movie |
| The Pumpkin Eater | 1964 | Conway | Movie |
| Torpedo Bay | 1963 | Captain Blayne | Movie |
| Escape from Zahrain | 1962 | Johnson (uncredited) | Movie |
| Hero's Island | 1962 | Jacob Weber | Movie |
| Lolita | 1962 | Prof. Humbert Humbert | Movie |
| Tiara Tahiti | 1962 | Capt. Brett Aimsley | Movie |
| Stoney Burke | 1962 | The Derelict | TV Show |
| The Alfred Hitchcock Hour | 1962 | Warren Barrow | TV Show |
| The Marriage-Go-Round | 1961 | Paul Delville | Movie |
| Dr. Kildare | 1961 | Dr. Maxwell Becker | TV Show |
| Theatre '62 | 1961 | Maxim de Winter | TV Show |
| The Trials of Oscar Wilde | 1960 | Edward Carson | Movie |
| John Brown's Raid | 1960 | John Brown | TV Movie |
| A Touch of Larceny | 1959 | Cmdr. Max Easton | Movie |
| Journey to the Center of the Earth | 1959 | Sir Oliver S. Lindenbrook | Movie |
| North by Northwest | 1959 | Phillip Vandamm | Movie |
| The DuPont Show with June Allyson | 1959 | Henry Chambers | TV Show |
| ITV Sunday Night Drama | 1959 | Torquil Callander | TV Show |
| Cry Terror! | 1958 | Jim Molner | Movie |
| The Decks Ran Red | 1958 | Capt. Edwin Rummill | Movie |
| Island in the Sun | 1957 | Maxwell Fleury | Movie |
| Goodyear Theatre | 1957 | Marius | TV Show |
| Panic! | 1957 | Father | TV Show |
| Bigger Than Life | 1956 | Ed Avery | Movie |
| Forever, Darling | 1956 | The Guardian Angel / James Mason | Movie |
| Playhouse 90 | 1956 | Hans Frick / John Brown / Hesketh / ... | TV Show |
| The James Mason Show | 1956 | Host / Performer | TV Show |
| General Electric Summer Originals | 1956 | | TV Show |
| ITV Play of the Week | 1955 | Bernard Sholto | TV Show |
| 20,000 Leagues Under the Sea | 1954 | Captain Nemo | Movie |
| A Star Is Born | 1954 | Norman Maine | Movie |
| Charade | 1954 | The Murderer / Maj. Linden / Jonah Watson | Movie |
| Prince Valiant | 1954 | Sir Brack | Movie |
| Botany Bay | 1953 | Capt. Paul Gilbert | Movie |
| Julius Caesar | 1953 | Brutus | Movie |
| The Desert Rats | 1953 | Field Marshal Erwin Rommel | Movie |
| The Man Between | 1953 | Ivo | Movie |
| The Story of Three Loves | 1953 | Charles Coutray (segment "The Jealous Lover") | Movie |
| The Tell-Tale Heart | 1953 | Narrator (voice) | Short Film |
| G.E. True Theater | 1953 | Wayne Sebastian | TV Show |
| 5 Fingers | 1952 | Ulysses Diello | Movie |
| Lady Possessed | 1952 | Jimmy Del Palma | Movie |
| Face to Face | 1952 | The Captain ('The Secret Sharer') | Movie |
| The Prisoner of Zenda | 1952 | Rupert of Hentzau | Movie |
| Omnibus | 1952 | Napoleon (segment "Napoleon's Love Letters") | TV Show |
| Ellis in Freedomland | 1952 | The Refrigerator (voice) | Movie |
| Pandora and the Flying Dutchman | 1951 | Hendrick van der Zee | Movie |
| The Desert Fox: The Story of Rommel | 1951 | Field Marshal Erwin Johannes Rommel | Movie |
| Schlitz Playhouse | 1951 | Captain Vialez | TV Show |
| One Way Street | 1950 | Dr. Frank Matson | Movie |
| Caught | 1949 | Larry Quinada | Movie |
| East Side, West Side | 1949 | Brandon Bourne | Movie |
| Madame Bovary | 1949 | Gustave Flaubert | Movie |
| The Reckless Moment | 1949 | Martin Donnelly | Movie |
| Odd Man Out | 1947 | Johnny McQueen | Movie |
| The Upturned Glass | 1947 | Michael Joyce | Movie |
| A Place of One's Own | 1945 | Smedhurst | Movie |
| The Seventh Veil | 1945 | Nicholas | Movie |
| The Wicked Lady | 1945 | Captain Jerry Jackson | Movie |
| They Were Sisters | 1945 | Geoffrey | Movie |
| Hotel Reserve | 1944 | Peter Vadassy | Movie |
| Man of Evil | 1944 | Lord Manderstoke | Movie |
| Candlelight in Algeria | 1944 | Alan Thurston | Movie |
| The Bells Go Down | 1943 | Ted Robbins | Movie |
| The Man in Grey | 1943 | Lord Rohan | Movie |
| They Met in the Dark | 1943 | Richard Francis Heritage | Movie |
| A.J. Cronin's Hatter's Castle | 1942 | Dr. Renwick | Movie |
| Secret Mission | 1942 | Raoul de Carnot | Movie |
| The Night Has Eyes | 1942 | Stephen Deremid | Movie |
| Thunder Rock | 1942 | Streeter | Movie |
| Alibi | 1942 | Andre Laurent | Movie |
| The Patient Vanishes | 1941 | Mick Cardby | Movie |
| I Met a Murderer | 1939 | Mark Warrow | Movie |
| Bees on the Boat-Deck | 1939 | Robert Patch | TV Movie |
| The Circle | 1939 | Edward Luton | TV Movie |
| L'avare | 1939 | Valere - In love with Elise | TV Movie |
| Square Pegs | 1939 | Lead role (27th February 1939 version) | TV Movie |
| Cyrano de Bergerac | 1938 | Christian de Neuvillette | TV Movie |
| The Moon in the Yellow River | 1938 | Darrell Blake | TV Movie |
| Fire Over England | 1937 | Vane | Movie |
| Return of the Scarlet Pimpernel | 1937 | Jean Tallien | Movie |
| Catch As Catch Can | 1937 | Robert Leyland | Movie |
| The High Command | 1937 | Capt. Heverell | Movie |
| Prison Breaker | 1936 | 'Bunny' Barnes | Movie |
| Secret of Stamboul | 1936 | Larry | Movie |
| The Mill on the Floss | 1936 | Tom Tulliver | Movie |
| Troubled Waters | 1936 | John Merriman | Movie |
| Blind Man's Bluff | 1936 | Stephen Neville | Movie |
| Twice Branded | 1936 | Henry Hamilton | Movie |
| Late Extra | 1935 | Jim Martin | Movie |
| Golden Showcase | | Sourab | TV Show |
