| The Mind Beyond: The Daedalus Equations | 1976 | Hans Daedalus | TV Movie |
| L'anticristo | 1974 | Father Mittner | Movie |
| It's Not the Size That Counts | 1974 | Prof. Godowski | Movie |
| Mahler | 1974 | Doctor Roth | Movie |
| Murder on the Orient Express | 1974 | Doctor Constantine | Movie |
| The Suicide Club | 1974 | | TV Movie |
| Papillon | 1973 | Dr. Chatal | Movie |
| The Last Days of Man on Earth | 1973 | Dr. Powys | Movie |
| Coffee, Tea or Me? | 1973 | Doctor | TV Movie |
| The Stranger | 1973 | Max Greene | TV Movie |
| BBC2 Playhouse | 1973 | Hans Daedalus | TV Show |
| Horror on Snape Island | 1972 | John Gurney | Movie |
| Clouds of Witness | 1972 | Mr. Grimthorpe | TV Show |
| Crown Court | 1972 | Father Attard | TV Show |
| Search | 1972 | Conte Carmine Lucchese | TV Show |
| A Clockwork Orange | 1971 | Professor (uncredited) | Movie |
| Blood from the Mummy's Tomb | 1971 | Berigan | Movie |
| No Blade of Grass | 1970 | Mr. Sturdevant | Movie |
| Unfair! | 1970 | Judge (as George Colouris) | Short Film |
| On Trial | 1970 | Edward Teller | TV Show |
| Land Raiders | 1969 | Cardenas | Movie |
| The Assassination Bureau | 1969 | Swiss Peasant | Movie |
| Christ Recrucified | 1969 | Old Ladas | TV Show |
| Ours Is a Nice House | 1969 | Rudolph Schultz | TV Show |
| The Other People | 1968 | Police Inspector | Movie |
| Treasure Island | 1968 | Black Dog | TV Show |
| Koroshi | 1968 | Controller (as George Colouris) | TV Movie |
| Too Many Thieves | 1967 | Andrew | Movie |
| Dundee and the Culhane | 1967 | Jeremiah Scrubbs | TV Show |
| The Prisoner | 1967 | Man with the Stick | TV Show |
| Haunted | 1967 | Vice Chancellor | TV Show |
| Arabesque | 1966 | Ragheeb | Movie |
| The Skull | 1965 | Dr. Londe | Movie |
| BBC Play of the Month | 1965 | Shepherd | TV Show |
| The Trials of O'Brien | 1965 | Cassiano Andrews | TV Show |
| The Crooked Road | 1965 | Carlo | Movie |
| Hereward the Wake | 1965 | Thord Gunlaugsson | TV Show |
| Scruggs | 1965 | | Movie |
| Secret Agent | 1964 | Controller | TV Show |
| The Wednesday Play | 1964 | Pokorny | TV Show |
| R3 | 1964 | Professor Vergas | TV Show |
| Miss Adventure | 1964 | Sgt. Papas / Sergeant Papas | TV Show |
| Come Fly with Me | 1963 | Vienna Police Inspector (uncredited) | Movie |
| In the Cool of the Day | 1963 | | Movie |
| Crane | 1963 | Dr. Jackson | TV Show |
| Doctor Who | 1963 | Arbitan | TV Show |
| Jezebel ex UK | 1963 | Sir George Jackson | TV Show |
| Z Cars | 1962 | Watchman | TV Show |
| Man of the World | 1962 | Gomez | TV Show |
| Suspense | 1962 | Dr. Bennett | TV Show |
| Zero One | 1962 | Garcia | TV Show |
| King of Kings | 1961 | Camel Driver | Movie |
| Ghost Squad | 1961 | Kowska | TV Show |
| Fury at Smugglers' Bay | 1961 | François Lejeune | Movie |
| Pathfinders to Venus | 1961 | Harcourt Brown | TV Show |
| Conspiracy of Hearts | 1960 | Petrelli | Movie |
| Surprise Package | 1960 | Dr. Hugo Panzer | Movie |
| Danger Man | 1960 | Police Commissioner | TV Show |
| Maigret | 1960 | Hotel Manager / Lorilleux | TV Show |
| Bluebeard's Ten Honeymoons | 1960 | Lacoste | Movie |
| The Boy Who Stole a Million | 1960 | Bank Manager | Movie |
| The Dickie Henderson Show | 1960 | | TV Show |
| Deadline Midnight | 1960 | John Greig | TV Show |
| Pathfinders to Mars | 1960 | Harcourt Brown / Harcourt Brown - The Imposter | TV Show |
| BBC Sunday-Night Play | 1960 | Dr. Bathory | TV Show |
| Tales of the Vikings | 1959 | The Chancellor | TV Show |
| The Third Man | 1959 | Captain Roget | TV Show |
| Charlesworth | 1959 | Igoru | TV Show |
| I Accuse! | 1958 | Colonel Sandherr | Movie |
| Tank Force | 1958 | Camp Commandant | Movie |
| The Woman Eater | 1958 | Doctor Moran | Movie |
| Law and Disorder | 1958 | 'Bennie' Bensuson | Movie |
| Son of Robin Hood | 1958 | Alan A Dale (as George Colouris) | Movie |
| Spy in the Sky! | 1958 | Col. Benedict | Movie |
| Saturday Playhouse | 1958 | Cliff Elder | TV Show |
| The Lost King | 1958 | Simon | TV Show |
| Doctor at Large | 1957 | Pascoe | Movie |
| Tarzan and the Lost Safari | 1957 | Carl Kraski | Movie |
| The Man Without a Body | 1957 | Karl Brussard | Movie |
| Kill Me Tomorrow | 1957 | Heinz Webber | Movie |
| The Beasts of Marseilles | 1957 | Paul Bourdin | Movie |
| The O. Henry Playhouse | 1957 | Doctor | TV Show |
| Private's Progress | 1956 | Padre (as George Colouris) | Movie |
| Hancock's Half Hour | 1956 | Mr. W. Procter | TV Show |
| The Big Money | 1956 | The Colonel | Movie |
| Assignment Foreign Legion | 1956 | Sultan Ahmed Bey | TV Show |
| Aggie | 1956 | Mr. Freddie | TV Show |
| Nom-de-Plume | 1956 | M. Felix / Editor in Munich | TV Show |
| Doctor at Sea | 1955 | 'Chippie' the Carpenter | Movie |
| ITV Television Playhouse | 1955 | Rasputin / Guiseppe | TV Show |
| London Playhouse | 1955 | Henri | TV Show |
| Doctor in the House | 1954 | Briggs | Movie |
| Duel in the Jungle | 1954 | Captain Malburn | Movie |
| The Runaway Bus | 1954 | Ernest Schroeder | Movie |
| Colonel March of Scotland Yard | 1954 | Harwood | TV Show |
| The Vise | 1954 | Oscar Brand | TV Show |
| Race for Life | 1954 | 'Pic' Dallapiccola | Movie |
| The Teckman Mystery | 1954 | Gavin | Movie |
| A Day to Remember | 1953 | Foreign Legion Captain. (uncredited) | Movie |
| The Heart of the Matter | 1953 | Portuguese Captain | Movie |
| Rheingold Theatre | 1953 | Craiger / Sala | TV Show |
| The Dog and the Diamonds | 1953 | Forbes | Movie |
| Outcast of the Islands | 1952 | Babalatchi | Movie |
| The Assassin | 1952 | Chief of Police Spadoni | Movie |
| A Time to Be Born | 1952 | An innkeeper | TV Movie |
| Island Rescue | 1951 | Capt. Weiss | Movie |
| BBC Sunday-Night Theatre | 1950 | Kashman / Edmundo Vargas / Mr. Lee / ... | TV Show |
| Kill or Be Killed | 1950 | Victor Sloma | Movie |
| A Southern Yankee | 1948 | Maj. Jack Drumman aka The Grey Spider | Movie |
| Beyond Glory | 1948 | Lew Proctor | Movie |
| Joan of Arc | 1948 | Sir Robert de Baudricourt - Governor of Vaucouleurs | Movie |
| Sleep, My Love | 1948 | Charles Vernay | Movie |
| The Philco-Goodyear Television Playhouse | 1948 | | TV Show |
| California | 1947 | Capt. Pharaoh Coffin | Movie |
| Where There's Life | 1947 | Prime Minister Krivoc | Movie |
| Mr. District Attorney | 1947 | James Randolph | Movie |
| Nobody Lives Forever | 1946 | Doc Ganson | Movie |
| The Verdict | 1946 | Supt. John R. Buckley | Movie |
| A Song to Remember | 1945 | Louis Pleyel | Movie |
| Confidential Agent | 1945 | Captain Currie | Movie |
| Hotel Berlin | 1945 | Commissioner Joachim Helm | Movie |
| Lady on a Train | 1945 | Mr. Saunders | Movie |
| Between Two Worlds | 1944 | Mr. Lingley | Movie |
| Mr. Skeffington | 1944 | Doctor Byles | Movie |
| None But the Lonely Heart | 1944 | Jim Mordinoy | Movie |
| The Master Race | 1944 | Colonel Frederick Von Beck | Movie |
| For Whom the Bell Tolls | 1943 | André Massart (uncredited) | Movie |
| This Land Is Mine | 1943 | Prosecutor | Movie |
| Watch on the Rhine | 1943 | Teck de Brancovis | Movie |
| Assignment in Brittany | 1943 | Capt. Hans Holz | Movie |
| Citizen Kane | 1941 | Walter Parks Thatcher | Movie |
| All This, and Heaven Too | 1940 | Charpentier | Movie |
| The Lady in Question | 1940 | Defense Attorney | Movie |
| The Streets of New York | 1939 | Gideon Bloodgood | TV Movie |
| Christopher Bean | 1933 | Tallent | Movie |
| Woman in Chains | 1932 | Daventry's Manservant (uncredited) | Movie |
