| |
| HIS MAJESTY THE AMERICAN | 1919 | [.] |
| The LAST OF THE MOHICANS | 1920 | marauding Indian |
| The CAVE GIRL | 1921 | Cast Member |
| The HOPE DIAMOND MYSTERY | 1921 | Cast Member |
| CHEATED HEARTS | 1921 | Cast Member |
| The ALTAR STAIRS | 1922 | Cast Member |
| DYNAMITE DAN | 1924 | Cast Member |
| LADY ROBINHOOD | 1925 | Cast Member |
| FORBIDDEN CARGO | 1925 | Cast Member |
| The BELLS | 1926 | Cast Member |
| FLAMES | 1926 | Cast Member |
| FLAMING FURY | 1926 | Cast Member |
| OLD IRONSIDES | 1926 | Saracen guard |
| HER HONOR THE GOVERNOR | 1926 | Snipe Collins |
| The PRINCESS FROM HOBOKEN | 1927 | Pavel |
| The LOVE MART | 1927 | Fleming |
| BEHIND THAT CURTAIN | 1929 | Cast Member |
| KING OF THE KONGO | 1929 | Cast Member |
| BURNING THE WIND | 1929 | Cast Member |
| The SEA BAT | 1930 | Cast Member |
| The UTAH KID | 1930 | Cast Member |
| The CRIMINAL CODE | 1930 | Ned Galloway |
| FRANKENSTEIN | 1931 | The Monster |
| GRAFT | 1931 | Cast Member |
| KING OF THE WILD | 1931 | Cast Member |
| The MAD GENIUS | 1931 | Fedor's father |
| The PUBLIC DEFENDER | 1931 | Cast Member |
| TONIGHT OR NEVER | 1931 | the waiter |
| The YELLOW TICKET | 1931 | Cast Member |
| YOUNG DONOVAN'S KID | 1931 | Cast Member |
| SMART MONEY | 1931 | ["Sport" Williams] |
| FIVE STAR FINAL | 1931 | T. Vernon Isopod |
| The GUILTY GENERATION | 1931 | Tony Ricca |
| PARDON US | 1931 | [.] |
| BEHIND THE MASK | 1932 | Henderson |
| The MASK OF FU MANCHU | 1932 | Dr Fu Manchu |
| The MIRACLE MAN | 1932 | Cast Member |
| NIGHT WORLD | 1932 | 'Happy' MacDonald |
| The OLD DARK HOUSE | 1932 | Morgan |
| SCARFACE | 1932 | Tom Gaffney |
| The COHENS AND KELLYS IN HOLLYWOOD | 1932 | [cameo] |
| The HOUSE OF ROTHSCHILD | 1933 | Cast Member |
| The GHOUL | 1933 | Professor Henry Morlant |
| The MUMMY | 1933 | Imhotep/Ardeth Bey |
| The BLACK CAT | 1934 | Hjalmar Poelzig |
| The LOST PATROL | 1934 | Sanders |
| GIFT OF GAB | 1934 | himself |
| The BLACK ROOM | 1935 | Gregor de Berghman/Anton de Berghman |
| BRIDE OF FRANKENSTEIN | 1935 | The Monster |
| The RAVEN | 1935 | Edmond Bateman |
| JUGGERNAUT | 1936 | Dr Sartorius |
| The MAN WHO CHANGED HIS MIND | 1936 | Dr Laurience |
| CHARLIE CHAN AT THE OPERA | 1936 | Gravelle |
| The INVISIBLE RAY | 1936 | Cast Member |
| The WALKING DEAD | 1936 | John Ellman |
| The INVISIBLE MENACE | 1937 | Cast Member |
| MR. WONG, DETECTIVE | 1937 | Cast Member |
| NIGHT KEY | 1937 | Dave Mallory |
| WEST OF SHANGHAI | 1937 | Cast Member |
| The MYSTERY OF MR. WONG | 1938 | Cast Member |
| TOWER OF LONDON | 1939 | Mord |
| DEVIL'S ISLAND | 1939 | Dr. Charles Gaudet |
| The MAN THEY COULD NOT HANG | 1939 | Dr. Henryk Savaard |
| MR. WONG IN CHINATOWN | 1939 | Cast Member |
| SON OF FRANKENSTEIN | 1939 | the monster |
| BLACK FRIDAY | 1940 | Doctor Ernest Sovac |
| The APE | 1940 | Cast Member |
| BEFORE I HANG | 1940 | Dr John Garth |
| The MAN WITH NINE LIVES | 1940 | Cast Member |
| BRITISH INTELLIGENCE | 1940 | Franz Strendler/Valdar |
| FATAL HOUR | 1940 | Cast Member |
| YOU'LL FIND OUT | 1940 | Judge Spencer Mainwaring |
| DOOMED TO DIE | 1940 | Cast Member |
| The DEVIL COMMANDS | 1941 | Dr. Julian Blair |
| The BOOGIE MAN WILL GET YOU | 1942 | Cast Member |
| The CLIMAX | 1944 | Cast Member |
| HOUSE OF FRANKENSTEIN | 1944 | Cast Member |
| The BODY SNATCHER | 1945 | John Gray |
| ISLE OF THE DEAD | 1945 | General Pherides |
| BEDLAM | 1946 | Master Sims |
| DICK TRACY MEETS GRUESOME | 1947 | Gruesome |
| LURED | 1947 | Charles Van Druten, artist |
| UNCONQUERED | 1947 | Cast Member |
| The SECRET LIFE OF WALTER MITTY | 1947 | Dr. Hollingshead |
| TAP ROOTS | 1948 | Tishomingo |
| CISARUV SLAVIK | 1948 | Narration (English Language) |
| BUD ABBOTT LOU COSTELLO MEET THE KILLER | 1949 | Swami Talpur |
| THREE O'CLOCK | 1949 | Host |
| The NIGHT REVEALS | 1949 | Host |
| The LEOPARD LADY | 1950 | Cast Member |
| The STRANGE DOOR | 1951 | Voltan |
| The BLACK CASTLE | 1952 | Dr. Meissen |
| DON QUIXOTE | 1952 | Don Quixote |
| The SIGNAL MAN | 1953 | Cast Member |
| COLONEL MARCH INVESTIGATES | 1953 | Colonel March |
| ABBOTT AND COSTELLO MEET DR. JEKYLL AND MR. HYDE | 1953 | Dr. Jekyll/Mr. Hyde |
| The HINDU | 1953 | General Pollegar |
| MURDER IS PERMANENT | 1956 | Colonel March |
| The DEVIL SELLS HIS SOUL | 1956 | Colonel March |
| The SECOND MONA LISA | 1956 | Colonel March |
| The STOLEN CRIME | 1956 | Colonel March |
| AT NIGHT ALL CATS ARE GRAY | 1956 | Colonel March |
| RENDEZVOUS IN BLACK | 1956 | Ward Allen |
| HOT MONEY | 1956 | Colonel March |
| DEATH IN THE DRESSING ROOM | 1956 | Colonel March |
| The NEW INVISIBLE MAN | 1956 | Colonel March |
| The ABOMINABLE SNOWMAN | 1956 | Colonel March |
| The CASE OF THE LIVELY GHOST | 1956 | Colonel March |
| The SORCERER | 1956 | Colonel March |
| The DEADLY GIFT | 1956 | Colonel March |
| PASSAGE AT ARMS | 1956 | Colonel March |
| The HEADLESS HAT | 1956 | Colonel March |
| The CASE OF THE KIDNAPPED POODLE | 1956 | Colonel March |
| The CASE OF THE MISGUIDED MISSAL | 1956 | Colonel March |
| DEATH AND THE OTHER MONKEY | 1956 | Colonel March |
| DEATH IN INNER SPACE | 1956 | Colonel March |
| The INVISIBLE KNIFE | 1956 | Colonel March |
| The MISSING LINK | 1956 | Colonel March |
| PRESENT TENSE | 1956 | Colonel March |
| The SILVER CURTAIN | 1956 | Colonel March |
| The STRANGE EVENT AT ROMAN FALL | 1956 | Colonel March |
| The TALKING HEAD | 1956 | Colonel March |
| The JUGGLER OF OUR LADY | 1957 | Presenter |
| VOODOO ISLAND | 1957 | Cast Member |
| The LARK | 1957 | Cast Member |
| ERROR AT DAYBREAK | 1957 | Colonel March |
| FRANKENSTEIN - 1970 | 1958 | Baron Victor von Frankenstein |
| GRIP OF THE STRANGLER | 1958 | James Rankin |
| CORRIDORS OF BLOOD | 1958 | Dr. Thomas Bolton |
| ROSE'S LAST SUMMER | 1960 | Host |
| MAN IN THE MIDDLE | 1960 | Host |
| GIRL WITH A SECRET | 1960 | Host |
| The GUILTY MEN | 1960 | Host |
| [series file] | 1960 | Host (all 67 episodes) |
| The TERROR IN TEAKWOOD | 1961 | host |
| PIGEONS FROM HELL | 1961 | Host |
| DAYS OF THRILLS AND LAUGHTER | 1961 | Cast Member |
| GUILLOTINE | 1961 | Host |
| LATE DATE | 1961 | Host |
| The PREMATURE BURIAL | 1961 | Dr Thorne |
| DIALOGUES WITH DEATH | 1961 | Pop Jenkins/Col Jackson Beauregard |
| The YELLOW PILL | 1962 | Presenter |
| LITTLE LOST ROBOT | 1962 | Presenter |
| COLD EQUATIONS | 1962 | Presenter |
| IMPOSTER | 1962 | Presenter |
| BOTANY BAY | 1962 | Presenter |
| MEDICINE SHOW | 1962 | Presenter |
| PICTURES DON'T LIE | 1962 | Presenter |
| The TYCOONS | 1962 | Presenter |
| VANISHING ACT | 1962 | Presenter |
| DIVIDED WE FALL | 1962 | Presenter |
| The DARK STAR | 1962 | Presenter |
| IMMIGRANT | 1962 | Presenter |
| TARGET GENERATION | 1962 | Presenter |
| The PARADINE CASE | 1962 | Cast Member |
| The RAVEN | 1963 | Dr Scarabus |
| The TERROR | 1963 | Baron von Leppe |
| The COMEDY OF TERRORS | 1963 | Amos Hinchley |
| I TRE VOLTI DELLA PAURA | 1963 | Gorka [3] |
| MONSTER OF TERROR | 1965 | Nahum Witley |
| HOW THE GRINCH STOLE CHRISTMAS | 1966 | Narrator |
| The VENETIAN AFFAIR | 1966 | Dr. Pierre Vaugiroud |
| DR. SEUSS' HOW THE GRINCH STOLE CHRISTMAS | 1966 | voice |
| MAD MONSTER PARTY | 1967 | Voice |
| The SORCERERS | 1967 | Professor Monserrat |
| TARGETS | 1967 | Byron Orlok |
| CURSE OF THE CRIMSON ALTAR | 1968 | Professor Marsh |
| El COLECCIONISTA DE CADAVERES | 1968 | Franz Badulescu |
| The HAUNTED HOUSE OF HORROR | 1969 | [originally cast in Dennis Price role] |
| La MUERTE VIVIENTE | 1971 | Dr Karl Van Molder, 'Damballah' |
| INVASION SINIESTRA | 1971 | Professor John Mayer |
| SERENATA MACABRA | 1971 | Matias Morthevald |
| La CAMARA DEL TERROR | 1972 | Karl Mantell |
| Lizard's Leg And Owlet's Wing | 1986 | Cast Member |
| TRANSYLVANIA TWIST | 1990 | Cast Member |
| WORSE THAN MURDER | 1995 | Host |
