Filmography
| Year | Title | Role |
| 2004 | Edgar G. Ulmer - The Man Off-screen | Self |
| 1986 | Peggy Sue Got Married | Leo |
| 1985 | Evils of the Night | Dr. Kozmar |
| 1984 | Ice Pirates | Supreme Commander |
| 1983 | Aladdin and His Wonderful Lamp | Voice |
| 1982 | The Secret of NIMH | Great Owl |
| 1982 | The Best of the Sex and Violence Cartoon Festival | Narrator |
| 1981 | The Howling (1981) | Erle Kenton |
| 1981 | The Monster Club | R.Chetwynd-Hayes |
| 1980 | The Boogey Man | Dr. Warren |
| 1979 | Monstroid | Priest |
| 1978 | The Bees | Dr. Sigmund Hummel |
| 1978 | Vampire Hookers | Actor |
| 1977 | Shock Waves | Captain |
| 1977 | Satan's Cheerleaders | The Bum |
| 1977 | The Sentinel | Fr. Francis Matthew Halloran |
| 1977 | Tail Gunner Joe | Wisconsin farmer |
| 1976 | The Last Tycoon | Tour guide |
| 1976 | The Shootist | Hezekiah Beckum (undertaker) |
| 1975 | Mary, Mary, Bloody Mary | The Man |
| 1974 | Moonchild | Mr. Walker |
| 1973 | The House of Seven Corpses | Edgar Price |
| 1973 | The Night Strangler | Llewellyn Crossbinder |
| 1972 | Everything You Always Wanted to Know About Sex (But Were Afraid to Ask) | Dr. Bernardo |
| 1972 | Boxcar Bertha | H. Buckram Sartoris |
| 1972 | Silent Night, Bloody Night | Charlie Towman |
| 1971 | Zora | Charlie Towman |
| 1970 | Myra Breckinridge | Surgeon |
| 1970 | Hell's Bloody Devils | Pet Shop Owner |
| 1970 | The McMasters | Preacher |
| 1969 | The Good Guys and the Bad Guys | Ticker |
| 1969 | Bigfoot | Jasper B. Hawks |
| 1968 | The Astro-Zombies | Dr. DeMarco |
| 1968 | A Pact With The Devil | Dr. Halback |
| 1967 | Hillbillys in a Haunted House | Dr. Himmel |
| 1967 | Psycho A Go Go | Dr. Vanard |
| 1964 | Cheyenne Autumn | Jeff Blair |
| 1962 | The Man Who Shot Liberty Valance (1962) | Major Cassius Starbuckle |
| 1959 | Invisible Invaders | Dr. Karol Noymann |
| 1958 | The Last Hurrah | Amos Force, Newspaper Publisher/Managing Editor |
| 1958 | The Incredible Petrified World | Prof. Millard Wyman |
| 1957 | The True Story of Jesse James | Rev. Jethro Bailey |
| 1957 | The Story of Mankind | Khufu |
| 1956 | The Ten Commandments (1956) | Aaron |
| 1956 | Around the World in 80 Days (1956) | Col. Proctor Stamp |
| 1956 | Female Jungle | Claude Almstead |
| 1955 | The Court Jester | Giacomo |
| 1955 | Stranger on Horseback | Col. Buck Streeter |
| 1955 | The Kentuckian | Fletcher |
| 1954 | Johnny Guitar | Old Tom |
| 1949 | C-Man | Doc Spencer |
| 1947 | The Private Affairs of Bel Ami | Charles Forestier |
| 1945 | House of Frankenstein | Dracula |
| 1945 | Captain Kidd | Orange Povey |
| 1945 | Fallen Angel | Professor Madley |
| 1945 | Dracula / House of Dracula | Count Dracula |
| 1944 | Alaska (1944) | John Reagan |
| 1944 | The Mummy's Ghost | Yousef Bey |
| 1944 | Voodoo Man | Toby |
| 1944 | ADVENTURES OF MARK TWAIN+FESTIVAL OF CLAYMATION | Bret Harte |
| 1943 | Revenge of the Zombies | Dr. Max Heinrich von Aldermann |
| 1943 | Captive Wild Woman | Dr. Sigmund Walters |
| 1943 | Hitler's Madman | Reinhardt Heydrich |
| 1942 | Reunion in France | Ulrich Windler |
| 1941 | Man Hunt (1941) | Mr. Jones |
| 1941 | Swamp Water | Jesse Wick |
| 1941 | Blood and Sand (1922) | Nacional |
| 1941 | Western Union | Doc Murdoch |
| 1940 | Brigham Young: Frontiersman | Porter Rockwell |
| 1940 | The Grapes of Wrath | Casy |
| 1940 | Chad Hanna | Bisbee |
| 1940 | The Return of Frank James | Bob Ford |
| 1939 | Mr. Moto's Last Warning | Danforth / Richard Burke |
| 1939 | Stagecoach (1939) | Hatfield |
| 1939 | Frontier Marshal | Ben Carter |
| 1939 | Drums Along the Mohawk | Caldwell |
| 1939 | Jesse James | Bob Ford |
| 1938 | Alexander's Ragtime Band | Taxi Driver |
| 1938 | Of Human Hearts | President Abraham Lincoln |
| 1938 | Gateway | Leader of Refugees |
| 1937 | Ali Baba Goes To Town | Ishak/Broderick/Himself |
| 1937 | Captains Courageous | Long Jack |
| 1937 | This Is My Affair | Ed |
| 1936 | Winterset | Bartolomeo Romagna |
| 1936 | Mary of Scotland | Rizzio |
| 1936 | The Garden of Allah | Sand Diviner |
| 1936 | The Prisoner of Shark Island | Sgt. Rankin |
| 1935 | Les Miserables (1935) | Enjolras |
| 1933 | The Story of Temple Drake | Courtroom spectator |
