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| Title | Year | Status | Character |
|---|
| The Shootist | 1976 | Beckum |
| Mary of Scotland | 1936 | David Rizzio |
| Won Ton Ton: The Dog Who Saved Hollywood | 1976 | Drunk |
| White Fang | 1936 | Beauty Smith |
| McCoy | 1976 | TV Series |
| Half Angel | 1936 | Sanatorium Inmate (voice, uncredited) |
| The Rookies | 1975 | TV Series | The Voice |
| Under Two Flags | 1936 | Cafard (scenes deleted) |
| Far Out Space Nuts | 1975 | TV Series | Ruler |
| A Message to Garcia | 1936 | President William McKinley (voice, uncredited) |
| Mobile One | 1975 | TV Series | Maynard Swope |
| The Prisoner of Shark Island | 1936 | Sgt. Rankin |
| Mary, Mary, Bloody Mary | 1975 | The Man |
| Anything Goes | 1936 | Bearded Ballet Master (uncredited) |
| Kung Fu | 1972-1975 | TV Series | Rev. Serenity Johnson |
| The Man Who Broke the Bank at Monte Carlo | 1935 | Despondent Casino Gambler (uncredited) |
| Stowaway to the Moon | 1975 | TV Movie | Jacob Avril |
| Bad Boy | 1935 | Angry Saxophone Player - Tenant (uncredited) |
| Westwind | 1975 | TV Series | Captain Hooks |
| The Crusades | 1935 | Leopold - Duke of Austria / A French King / A Wise Man (uncredited) |
| The Lady's Not for Burning | 1974 | TV Movie | Old Skips |
| She Gets Her Man | 1935 | Lunchroom customer (uncredited) |
| Emergency! | 1974 | TV Series | Jonas Larson |
| Alias Mary Dow | 1935 | Griffe - Nightclub Drunk (uncredited) |
| Moonchild | 1974 | Mr. Walker |
| Bride of Frankenstein | 1935 | Hunter at Hermit's Cottage (uncredited) |
| The Cowboys | 1974 | TV Series | Oscar Schmidt |
| Cardinal Richelieu | 1935 | Agitator |
| The House of Seven Corpses | 1974 | Edgar Price |
| Les Misérables | 1935 | Enjolras |
| The Cat Creature | 1973 | TV Movie | The Hotel Clerk |
| Transient Lady | 1935 | Ren Baxter (uncredited) |
| Shadow House | 1973 | Short | Uncle |
| Clive of India | 1935 | Drunken-Faced Clerk (uncredited) |
| Superchick | 1973 | Igor Smith |
| Cleopatra | 1934 | Roman Citizen / Party Guest / Soldier (voice, uncredited) |
| Bad Charleston Charlie | 1973 | Fritz Frugal - Reporter |
| The Black Cat | 1934 | Cult Organist (uncredited) |
| Terror in the Wax Museum | 1973 | Claude Dupree |
| The Meanest Gal in Town | 1934 | Stranded Actor (uncredited) |
| Love, American Style | 1973 | TV Series | Old George Pomerantz (segment "Love and the Anniversary") |
| The Invisible Man | 1933 | Informer Suggesting Ink (uncredited) |
| The Night Strangler | 1973 | TV Movie | Llewellyn Crossbinder |
| To the Last Man | 1933 | Pete Garon (uncredited) |
| 1,000,000 A.D. Promo Reel | 1973 | Short |
| This Day and Age | 1933 | Assistant Principal Abernathy (as John Peter Richmond) |
| Silent Night, Bloody Night | 1972 | Charlie Towman |
| Morning Glory | 1933 | Dream Apparition (uncredited) |
| Everything You Always Wanted to Know About Sex * But Were Afraid to Ask | 1972 | Doctor Bernardo |
| The Story of Temple Drake | 1933 | Courtroom Spectator (uncredited) |
| Richard | 1972 | Plastic Surgeon |
| The Sign of the Cross | 1932 | Christian Martyr / Gladiator Leader / Voice in Coliseum Mob / ... (uncredited) |
| Portnoy's Complaint | 1972 | Judge (voice, uncredited) |
| Forgotten Commandments | 1932 | First Orator (uncredited) |
| Boxcar Bertha | 1972 | H. Buckram Sartoris |
| Heaven on Earth | 1931 | Chicken Sam (as Peter Richmond) |
| The Legend of Sleepy Hollow | 1972 | Short | Narrator (voice) |
| Tol'able David | 1930 | Buzzard Hatburn (as Peter Richmond) |
| Ironside | 1971 | TV Series | Isaiah Witt, 'The Creeper' |
| Bright Lights | 1930 | Telegraph Newspaper Photographer (uncredited) |
| Night Gallery | 1971 | TV Series | Mr. Hawkins (segment "Big Surprise") |
| Decisions! Decisions! | 1971 | TV Movie | Railroad ticket clerk |
| The Seven Minutes | 1971 | Sean O'Flanagan |
| The Gatling Gun | 1971 | Rev. Harper |
| Will to Die | 1971 | Christopher Dean |
| Honey Britches | 1971 | The Judge of Hell (uncredited) |
| Threshold | 1971 | Short | Old-fashioned Undertaker |
| Crowhaven Farm | 1970 | TV Movie | Nate Cheever |
| Bigfoot | 1970 | Jasper B. Hawks |
| The McMasters | 1970 | Preacher |
| Shinbone Alley | 1970 | Tyrone T. Tattersall (voice) |
| Myra Breckinridge | 1970 | Surgeon |
| Blood of the Iron Maiden | 1970 | Dr. Goolie |
| Horror of the Blood Monsters | 1970 | Dr. Rynning |
| Cain's Way | 1970 | Preacher Simms |
| Hell's Bloody Devils | 1970 | Pet Shop Owner |
| The Mummy and the Curse of the Jackals | 1969 | Prof. Cummings |
| Daughter of the Mind | 1969 | TV Movie | Mr. Bosch |
| Bonanza | 1961-1969 | TV Series | Preacher Dillard / Jedediah Milbank |
| Madame Death | 1969 | Dr. Favel |
| Land of the Giants | 1969 | TV Series | Egor Crull |
| Enigma de muerte | 1969 | Mad Doctor / Nazi Leader |
| Five Bloody Graves | 1969 | Boone Hawkins |
| The Good Guys and the Bad Guys | 1969 | Ticker |
| Las vampiras | 1969 | Count Branos Alucard |
| Blood of Dracula's Castle | 1969 | George - the butler |
| The Trouble with Girls | 1969 | Mr. Drewcolt |
| The Big Valley | 1969 | TV Series | Elias Brown |
| Diabolical Pact | 1969 | Dr. Halback |
| Autopsia de un fantasma | 1968 | Satán |
| The Astro-Zombies | 1968 | Dr. DeMarco |
| They Ran for Their Lives | 1968 | Laslo |
| Daniel Boone | 1968 | TV Series | Zack Pike |
| The Helicopter Spies | 1968 | Third-Way Priest |
| Antologia del miedo | 1968 | Short |
| Psycho | 1967 | Dr. Howard Vanard |
| Hondo | 1967 | TV Series | Dr. Leonard Zeber |
| The Hostage | 1967 | Otis Lovelace |
| The Man from U.N.C.L.E. | 1967 | TV Series | Old Man - Third-Way Priest |
| Hillbillys in a Haunted House | 1967 | Dr. Himmil |
| Lost in Space | 1967 | TV Series | Arcon |
| The Green Hornet | 1967 | TV Series | James Rancourt / The Scarf |
| Gallery of Horror | 1967 | Narrator / Tristram Halbin |
| The Emperor's New Clothes | 1966 | King Luvimself |
| Night Train to Mundo Fine | 1966 | Mr. Wilson |
| The Girl from U.N.C.L.E. | 1966 | TV Series | Prof. Boris Budge |
| Munster, Go Home! | 1966 | Cruikshank |
| Branded | 1965-1966 | TV Series | General Joshua McCord
Gen. Josh McCord
Gen. Joshua McCord |
| Billy the Kid Versus Dracula | 1966 | Count Dracula / posing as James Underhill |
| Laredo | 1966 | TV Series | Prof. Paracelsus Smythe |
| The Legend of Jesse James | 1966 | TV Series | Noah |
| The Munsters | 1965-1966 | TV Series | Mr. Gateman |
| The Beverly Hillbillies | 1966 | TV Series | Marvin Bagby / Marvo the Magnificent |
| House of the Black Death | 1965 | Andre Desard |
| The Wizard of Mars | 1965 | The Wizard of Mars |
| The Alfred Hitchcock Hour | 1965 | TV Series | Gavin Revere |
| Curse of the Stone Hand | 1965 | The Old Drunk |
| Something for Mrs. Gibbs | 1965 | Short |
| Genesis | 1964/I | Narrator |
| Cheyenne Autumn | 1964 | Jeff Blair |
| The Patsy | 1964 | Bruce Alden |
| The Lucy Show | 1964 | TV Series | Professor Guzman |
| Lawman | 1962 | TV Series | Geoffrey Hendon |
| The Man Who Shot Liberty Valance | 1962 | Maj. Cassius Starbuckle |
| The Red Skelton Hour | 1956-1962 | TV Series | Abdul Kashmir / Dr. Prager / Slim Jim / ... |
| Thriller | 1961 | TV Series | Jason Longfellow / Jed Carta |
| Death Valley Days | 1961 | TV Series | The Stranger |
| Maverick | 1961 | TV Series | Judge Reese |
| Wagon Train | 1958-1960 | TV Series | Park Cleatus / Doc Lockridge |
| Harrigan and Son | 1960 | TV Series | Nippy |
| The Twilight Zone | 1960 | TV Series | Brother Jerome |
| The Rebel | 1959-1960 | TV Series | Elmer Dodson |
| Sex Kittens Go to College | 1960 | Prof. Watts |
| Tarzan the Magnificent | 1960 | Abel Banton |
| The Adventures of Huckleberry Finn | 1960 | Slave Catcher |
| Overland Trail | 1960 | TV Series | Caleb Nash |
| Lock Up | 1960 | TV Series | James Carew |
| Wanted: Dead or Alive | 1960 | TV Series | Amos McKenna |
| Johnny Ringo | 1959 | TV Series | The Rain Man |
| The Incredible Petrified World | 1959 | Prof. Millard Wyman |
| The Life and Legend of Wyatt Earp | 1959 | TV Series | Don Ignacio Vasquez |
| The Oregon Trail | 1959 | Zachariah Garrison |
| Gunsmoke | 1955-1959 | TV Series | Kader / Ephraim Hunt |
| Invasion of the Animal People | 1959 | Narrator (English version, voice) |
| Man Without a Gun | 1959 | TV Series | The Devil |
| The Rifleman | 1959 | TV Series | James Barrow McBride
Abel Goss |
| Invisible Invaders | 1959 | Dr. Karol Noymann |
| Tombstone Territory | 1959 | TV Series | Sheriff Binns |
| The Millionaire | 1959 | TV Series | Karl Miller AKA Count Karl Millevich |
| Bat Masterson | 1959 | TV Series | Sheriff Vince Morgan |
| The Cosmic Man | 1959 | Cosmic Man |
| The Rough Riders | 1959 | TV Series | Alexander Sugrue |
| Rescue 8 | 1959 | TV Series | Craig Wilde |
| Cimarron City | 1959 | TV Series | Jared Tucker |
| Half Human | 1958 | Dr. John Rayburn - Narrator |
| Sugarfoot | 1958 | TV Series | Mathew McDavitt |
| 77 Sunset Strip | 1958 | TV Series | Roderick Delaquois |
| The Last Hurrah | 1958 | Amos Force |
| Have Gun - Will Travel | 1958 | TV Series | Father Bartolome |
| The Proud Rebel | 1958 | Traveling Salesman |
| The Restless Gun | 1958 | TV Series | Archibald Plunkette / Archie Plunker |
| Showdown at Boot Hill | 1958 | Doc Weber |
| The Lineup | 1958 | TV Series | Deacon Whitehall |
| Suspicion | 1958 | TV Series | Raphael |
| Hell Ship Mutiny | 1957 | Malone |
| Telephone Time | 1957 | TV Series | Kurt Wolfgang Muller / Charlie Brown |
| Matinee Theatre | 1956-1957 | TV Series | Dracula
Jaffrey Pyncheon |
| Studio One in Hollywood | 1957 | TV Series | Mr. Wadleigh |
| The Story of Mankind | 1957 | Khufu |
| The DuPont Show of the Month | 1957 | TV Series | John Canty |
| Navy Log | 1957 | TV Series | Narrator / Francis Carpenter |
| The Unearthly | 1957 | Dr. Charles Conway |
| Schlitz Playhouse | 1957 | TV Series |
| Cheyenne | 1957 | TV Series | Delos Gerrard |
| The O. Henry Playhouse | 1957 | TV Series | Doc Millikin |
| The True Story of Jesse James | 1957 | Rev. Jethro Bailey |
| Playhouse 90 | 1957 | TV Series | Felix the Great |
| Around the World in Eighty Days | 1956 | Col. Stamp Proctor - San Francisco Politico |
| The Ten Commandments | 1956 | Aaron |
| Sneak Preview | 1956 | TV Series |
| Female Jungle | 1956 | Claude Almstead |
| The Black Sleep | 1956 | Borg aka Bohemond |
| Studio 57 | 1956 | TV Series | Uncle John |
| Damon Runyon Theater | 1956 | TV Series | Willis Cooper |
| My Friend Flicka | 1956 | TV Series | Matt Barnes / Mathew Jay Breckinridge |
| Front Row Center | 1956 | TV Series | Frank Deasy |
| Hidden Guns | 1956 | Snipe Harding |
| Climax! | 1955-1956 | TV Series | Colonel Archer
The Duke
John Evan |
| Dark Venture | 1956 | Gideon |
| The Court Jester | 1955 | Giacomo |
| Desert Sands | 1955 | Jala the Wine Merchant |
| The Adventures of Huckleberry Finn | 1955 | TV Movie | The Duke |
| The Kentuckian | 1955 | Ziby Fletcher |
| Stranger on Horseback | 1955 | Col. Buck Streeter |
| Adventures of Wild Bill Hickok | 1954 | TV Series | Sir Rodney Brentwood |
| Tales of a Wayward Inn | 1954 | TV Movie |
| Thunder Pass | 1954 | Bergstrom |
| The Egyptian | 1954 | Grave Robber |
| Johnny Guitar | 1954 | Old Tom |
| The Adventures of Ozzie & Harriet | 1954 | TV Series | Cameron Whitfield |
| Casanova's Big Night | 1954 | Minister Foressi |
| Suspense | 1953 | TV Series |
| The Kate Smith Hour | 1953 | TV Series | Hyder Simpson |
| The Adventures of Fu Manchu: The Zayat Kiss | 1952 | TV Movie | Dr. Fu Manchu |
| Lights Out | 1950-1952 | TV Series | Cecil Crofton |
| Gang Busters | 1952 | TV Series |
| My Friend Irma | 1952 | TV Series | Mr. Corday (1953-1954) |
| Thunderbolt the Wondercolt | 1952 | TV Series | Thundercolt (voice) |
| The Web | 1950-1951 | TV Series |
| Faith Baldwin Romance Theatre | 1951 | TV Series |
| The Adventures of Ellery Queen | 1951 | TV Series |
| Sure As Fate | 1951 | TV Series | Macbeth |
| The Chevrolet Tele-Theatre | 1948-1949 | TV Series |
| 'C'-Man | 1949 | Doc Spencer |
| The Philco-Goodyear Television Playhouse | 1949 | TV Series | Murderer / Malvolio |
| A Christmas Carol | 1947 | TV Movie | Ebenezer Scrooge |
| The Private Affairs of Bel Ami | 1947 | Charles Forestier |
| Down Missouri Way | 1946 | Thorndyke 'Thorny' P. Dunning |
| The Face of Marble | 1946 | Dr. Charles Randolph |
| House of Dracula | 1945 | Count Dracula |
| Captain Kidd | 1945 | Orange Povy |
| Jack-O | 1995 | Walter Machen |
| Fallen Angel | 1945 | Professor Madley |
| Buried Alive | 1990 | Jacob Julian |
| It's in the Bag! | 1945 | Jefferson T. Pike |
| Evil Spawn | 1987 | Dr. Emil Zeitman |
| House of Frankenstein | 1944 | Dracula |
| Peggy Sue Got Married | 1986 | Leo |
| Alaska | 1944 | John Reagan |
| Monster in the Closet | 1986 | Old Joe Shempter |
| Bluebeard | 1944 | Gaston Morel |
| The Tomb | 1986 | Mr. Andoheb |
| Barbary Coast Gent | 1944 | Duke Cleat |
| Revenge | 1986 | Video | Sen. Martin Bradford |
| Return of the Ape Man | 1944 | Prof. John Gilmore |
| The Twilight Zone | 1986 | TV Series | Prof. Alex Stottel (segment "Still Life") |
| The Mummy's Ghost | 1944 | Yousef Bey |
| Prison Ship | 1986 | The Justice |
| Waterfront | 1944 | Victor Marlow |
| Frankenstein's Brain | 1985 | Short voice |
| The Invisible Man's Revenge | 1944 | Doctor Drury |
| Fame | 1985 | TV Series | Danny Amatullo |
| The Black Parachute | 1944 | General von Bodenbach |
| Evils of the Night | 1985 | Dr. Kozmar |
| The Adventures of Mark Twain | 1944 | Bret Harte |
| The Fall Guy | 1984 | TV Series | Preston Deauville |
| Voodoo Man | 1944 | Toby |
| Antony and Cleopatra | 1984 | TV Movie | Soothsayer |
| Gangway for Tomorrow | 1943 | Mr. Wellington |
| Welcome to the Fun Zone | 1984 | TV Movie | Golf Course Attendant |
| Revenge of the Zombies | 1943 | Dr. Max Heinrich Von Altermann |
| The Ice Pirates | 1984 | Supreme Commander |
| Isle of Forgotten Sins | 1943 | Mike Clancy |
| Young People's Specials | 1984 | TV Series | Umbrella Jack |
| Silver Spurs | 1943 | Lucky Miller |
| A Rose for Emily | 1983 | Short | Col. Sartoris |
| Hitler's Madman | 1943 | Reinhardt Heydrich |
| House of the Long Shadows | 1983 | Lord Elijah Grisbane |
| Captive Wild Woman | 1943 | Dr. Sigmund Walters |
| The Vals | 1983 | Mr. Stanton - Head of the Orphanage |
| I Escaped from the Gestapo | 1943 | Martin - Gestapo Agent |
| The Secret of NIMH | 1982 | Great Owl (voice) |
| Reunion in France | 1942 | Ulrich Windler |
| Satan's Mistress | 1982 | Father Stratten |
| Northwest Rangers | 1942 | Martin Caswell |
| Klynham Summer | 1982 | Hubert Salter |
| Whispering Ghosts | 1942 | Norbert (Long Jack) |
| Aladdin and the Magic Lamp | 1982 | The Wizard (English version, voice) |
| Son of Fury: The Story of Benjamin Blake | 1942 | Caleb Green |
| Fantasy Island | 1982 | TV Series | Mortician |
| Swamp Water | 1941 | Jesse Wick |
| Frankenstein Island | 1981 | Dr. Frankenstein |
| Man Hunt | 1941 | Mr. Jones |
| Goliath Awaits | 1981 | TV Movie | Ronald Bentley |
| Blood and Sand | 1941 | El Nacional |
| The Nesting | 1981 | Col. LeBrun |
| Western Union | 1941 | Doc Murdoch |
| CBS Library | 1981 | TV Series | Narrator - The Reluctant Dragon |
| Chad Hanna | 1940 | B.D. Bisbee |
| The Monster Club | 1981 | R.Chetwynd-Hayes - Writer |
| Brigham Young | 1940 | Porter Rockwell |
| The Howling | 1981 | Erle Kenton |
| The Return of Frank James | 1940 | Bob Ford |
| The Reluctant Dragon | 1981 | Short | Narrator (voice) |
| The Grapes of Wrath | 1940 | Jim Casy |
| The Boogey Man | 1980 | Dr. Warren |
| Drums Along the Mohawk | 1939 | Caldwell |
| Monster | 1980 | Priest |
| Frontier Marshal | 1939 | Ben Carter |
| The Long Riders | 1980 | scenes deleted |
| Five Came Back | 1939 | Crimp |
| The Littlest Hobo | 1979 | TV Series | Chief Justice Hamilton |
| Captain Fury | 1939 | Coughy / Roger Bradford |
| Americathon | 1979 | Uncle Sam (scenes deleted) |
| The Hound of the Baskervilles | 1939 | Barryman |
| B.J. and the Bear | 1979 | TV Series | Transylvanian Caretaker |
| The Three Musketeers | 1939 | Naveau |
| Nocturna | 1979 | Count Dracula |
| Stagecoach | 1939 | Hatfield |
| Missile X: The Neutron Bomb Incident | 1979 | Professor Nikolaeff |
| Mr. Moto's Last Warning | 1939 | Danforth |
| The Seekers | 1979 | TV Mini-Series | Avery Mills |
| Jesse James | 1939 | Bob Ford |
| Wonder Woman | 1978 | TV Series | Harlow Gault |
| Submarine Patrol | 1938 | McAllison |
| Greatest Heroes of the Bible | 1978 | TV Series | King David |
| Gateway | 1938 | Leader of Refugees |
| Flying High | 1978 | TV Series | Eston |
| I'll Give a Million | 1938 | Kopelpeck |
| The Bees | 1978 | Dr. Sigmund Hummel |
| Kidnapped | 1938 | Gordon |
| Vega$ | 1978 | TV Series | Mr. Goody |
| Alexander's Ragtime Band | 1938 | Taxi Driver |
| Vampire Hookers | 1978 | Richmond Reed |
| Kentucky Moonshine | 1938 | Reef Hatfield |
| Sunset Cove | 1978 | Judge Harley Winslow |
| Four Men and a Prayer | 1938 | General Adolfo Arturios Gregario Sebastian |
| Doctor Dracula | 1978 | Hadley Radcliff |
| Of Human Hearts | 1938 | President Lincoln |
| Starsky and Hutch | 1978 | TV Series | The Professor |
| International Settlement | 1938 | Murdock |
| The Lady and the Lynchings | 1977 | TV Movie |
| Thank You, Mr. Moto | 1937 | Pereira |
| Christmas Miracle in Caufield, U.S.A. | 1977 | TV Movie | Grampa Sullivan |
| The Last Gangster | 1937 | Casper |
| Golden Rendezvous | 1977 | Fairweather |
| The Hurricane | 1937 | Warden |
| Shock Waves | 1977 | Captain Ben Morris |
| Ali Baba Goes to Town | 1937 | Ishak / Broderick |
| The Mouse and His Child | 1977 | The Tramp (voice) |
| Danger - Love at Work | 1937 | Herbert Pemberton |
| Satan's Cheerleaders | 1977 | The Bum |
| Love Under Fire | 1937 | Capt. Delmar |
| The White Buffalo | 1977 | Amos Briggs (Undertaker) |
| This Is My Affair | 1937 | Ed |
| McCloud | 1977 | TV Series | Loren Belasco |
| Captains Courageous | 1937 | 'Long Jack' |
| Tail Gunner Joe | 1977 | TV Movie | Wisconsin Farmer |
| Nancy Steele Is Missing! | 1937 | Harry Wilkins |
| The Sentinel | 1977 | Father Halliran |
| Laughing at Trouble | 1936 | Deputy Sheriff Alec Brady |
| Crash! | 1976 | Dr. Welsey Edwards |
| Winterset | 1936 | Bartolomio Romagna |
| The Last Tycoon | 1976 | Tour Guide |
| Daniel Boone | 1936 | Simon Girty |
| The Killer Inside Me | 1976 | Dr. Jason Smith |
| The Garden of Allah | 1936 | Sand Diviner |
| Captains and the Kings | 1976 | TV Mini-Series | Father Hale |
| Dimples | 1936 | Richards |
| Death at Love House | 1976 | TV Movie | Conan Carroll |
| Ramona | 1936 | Jim Farrar |