Boris Karloff (23 November 1887 – 2 February 1969), whose real name was William Henry Pratt, was an English-born actor who emigrated to Canada in 1909. Karloff is best remembered for his roles in horror films and his portrayal of Frankenstein's monster in Frankenstein (1931), Bride of Frankenstein (1935), and Son of Frankenstein (1939). His popularity following Frankenstein was such that for a brief time he was billed simply as "Karloff" or "Karloff the Uncanny". His best-known non-horror role is as the Grinch in the television special of Dr. Seuss’s How the Grinch Stole Christmas!.
| 2024 | The Last Repair Shop as The Monster (archive footage) (uncredited) |
| 2022 | Boris Karloff: The Rest of the Story as Self - Interviewee |
| 2021 | Boris Karloff: The Man Behind the Monster as Self (archive footage) |
| 2015 | Jack Pierce: The Man Who Made the Monsters as Self (archive footage) |
| 2014 | Monster Madness: The Golden Age of the Horror Film as Various roles (archive footage) |
| 2013 | A Masque of Madness (Notes on Film 06-B, Monologue 02) as Self (archive footage) |
| 2013 | Classic Movie Bloopers: Uncensored as Self (archive footage) |
| 2012 | The Complete Bob Wilkins Creature Features |
| 2008 | He Who Made Monsters: The Life and Art of Jack Pierce as Self (archive footage) |
| 2007 | Le vampire déchu as Himself (archive footage) |
| 2007 | Ian Rankin Investigates: Dr. Jekyll & Mr. Hyde as Cabman John Gray (archive footage) |
| 2007 | Famous Monster: Forrest J Ackerman as Self (archive footage) |
| 2006 | Lugosi: The Dark Prince as Self (archive footage) |
| 2006 | Karloff: The Gentle Monster as Self (archive footage) |
| 2006 | Terror in the Tropics as Mr. Wong (archive footage) |
| 2004 | Monster Movie Trivia Quiz |
| 2003 | The Mesmerist as (archive footage) |
| 2002 | The 'Frankenstein' Files: How Hollywood Made a Monster as Self (archive footage) |
| 2001 | Heroes of Horror as (archive footage) |
| 2000 | The American Nightmare as Self |
| 2000 | Mummy Dearest: A Horror Tradition Unearthed as Self (archive footage) |
| 2000 | The Many Faces of Dracula as The Monster (archive footage) |
| 1999 | Monster by Moonlight! The Immortal Saga of 'The Wolf Man' as Self (archive footage) |
| 1998 | Universal Horror as (archive footage) |
| 1996 | The Universal Story as Himself (archive footage) |
| 1994 | How the Grinch Stole Christmas! Special Edition as (voice - archive footage) |
| 1994 | In Search of Dr. Seuss as (voice) (archive footage) (uncredited) |
| 1991 | Dracula: A Cinematic Scrapbook as Doctor Gustav Niemann (archive footage) |
| 1991 | Frankenstein: A Cinematic Scrapbook as The Monster / Gustav Niemann / Dr. Jekyll / Mr. Hyde / etc. |
| 1990 | Myrna Loy: So Nice to Come Home To as (archive footage) |
| 1990 | Abbott and Costello in the Movies as Archival |
| 1989 | Transylvania Twist as Man in Room |
| 1987 | Creepy Classics as Dr. Scarabus - (archive footage) |
| 1986 | Horrible Horror as Gruesome in 'Dick Tracey Meets Gruesome' |
| 1984 | Terror in the Aisles as The Monster (Archive Footage) |
| 1984 | Going Hollywood: The '30s as (archive footage) |
| 1983 | The Horror of It All as Frankenstein / Cabman John Gray (archive footage) |
| 1982 | Oops, Those Hollywood Bloopers! as Self (archive footage) |
| 1979 | The Horror Show as (archive footage) |
| 1975 | Brother, Can You Spare a Dime? as Self (archive footage) |
| 1974 | Madhouse as (archive footage) |
| 1974 | The Horror Hall of Fame: A Monster Salute as Self (archive footage) |
| 1971 | Invasión Siniestra as Prof. John Mayer |
| 1971 | La muerte viviente as Carl van Molder / Damballah |
| 1970 | Il rosso segno della follia as Gorca (archive footage) |
| 1970 | El coleccionista de cadáveres as Franz Badulescu |
| 1968 | Curse of the Crimson Altar as Professor John Marsh |
| 1968 | Hedefler as Byron Orlok |
| 1968 | Fear Chamber as Dr. Carl Mandel |
| 1968 | Serenata Macabra as Matthias Morteval |
| 1968 | The Movie Orgy as Self (archive footage) |
| 1967 | The Sorcerers as Prof. Marcus Monserrat |
| 1967 | Mad Monster Party? as Baron Boris von Frankenstein (voice) |
| 1967 | The Venetian Affair as Dr. Pierre Vaugiroud |
| 1966 | Grinç as Narrator / The Grinch (voice) |
| 1966 | The Daydreamer as The Rat (voice) |
| 1966 | The Ghost in the Invisible Bikini as The Corpse |
| 1966 | Doom of Dracula as The Madman |
| 1965 | Die, Monster, Die! as Nahum Witley |
| 1965 | The Son of Frankenstein as The Monster (archive footage) |
| 1964 | Bikini Beach as Art Dealer |
| 1964 | Today's Teens as Narrator |
| 1964 | The Comedy of Terrors as Amos Hinchley |
| 1964 | Horror!!! as Self |
| 1964 | Mondo Balordo as Narrator |
| 1963 | I tre volti della paura as Gorca (segment "The Wurdalak") |
| 1963 | Dehşet as Baron Victor Frederick Von Leppe |
| 1963 | The Raven as Dr. Scarabus |
| 1962 | Little Lost Robot as Host |
| 1962 | The Incredible Doktor Markesan as Dr. Konrad Markesan |
| 1962 | Arsenic & Old Lace as Jonathan Brewster |
| 1962 | The Storm |
| 1961 | The Return of Andrew Bentley as Host |
| 1961 | Days of Thrills and Laughter as Self (archive footage) |
| 1958 | Corridors of Blood as Dr. Thomas Bolton |
| 1958 | Heart of Darkness as Mr. Kurtz |
| 1958 | Frankenstein 1970 as Baron Viktor von Frankenstein |
| 1958 | Grip of the Strangler as James Rankin |
| 1958 | Destination Nightmare as Host / Ira Perry / Pete Wade Sr. / Professor Charles Goncourt / Morgan Debs |
| 1958 | Jack the Ripper as Host / Capt. John Elwood / Jonas Atterbury / Dr. Francis Mason |
| 1957 | The Juggler of Our Lady as Narrator (voice) |
| 1957 | The Lark as Bishop Cauchon |
| 1957 | Voodoo Island as Phillip Knight |
| 1955 | A Connecticut Yankee as King Arthur |
| 1955 | The Sting of Death as Mr. Mycroft |
| 1955 | Sabaka as General Pollegar |
| 1954 | Il mostro dell'isola as Don Gaetano |
| 1953 | Abbott and Costello Meet Dr. Jekyll and Mr. Hyde as Dr. Henry Jekyll / Mr. Hyde |
| 1953 | Colonel March Investigates as Colonel March |
| 1952 | The Black Castle as Dr. Meissen |
| 1951 | The Strange Door as Voltan |
| 1949 | Abbott and Costello Meet the Killer, Boris Karloff as Swami Talpur |
| 1949 | Císařův slavík as Narrator (English version) |
| 1948 | Tap Roots as Tishomingo |
| 1947 | Unconquered as Guyasuta, Chief of the Senecas |
| 1947 | Dick Tracy Meets Gruesome as Gruesome |
| 1947 | The Secret Life of Walter Mitty as Dr. Hugo Hollingshead |
| 1947 | Lured as Charles van Druten |
| 1946 | Bedlam as George Sims |
| 1945 | Isle of the Dead as Gen. Nikolas Pherides |
| 1945 | Yeraltı Canavarı as John Gray |
| 1944 | The Mummy's Curse as Kharis in Flashback (archive footage / uncredited) |
| 1944 | House of Frankenstein as Dr. Gustav Niemann |
| 1944 | Ölmeyen Rüyalar as Dr. Friedrich Hohner |
| 1942 | The Boogie Man Will Get You as Prof. Nathaniel Billings |
| 1942 | Hedda Hopper’s Hollywood No. 6 as Himself |
| 1941 | Information Please: Series 2, No. 12 as Self |
| 1941 | The Devil Commands as Dr. Julian Blair |
| 1940 | You'll Find Out as Judge Spencer Mainwaring |
| 1940 | The Ape as Dr. Bernard Adrian |
| 1940 | The Mummy's Hand as Kharis (archive footage / uncredited) |
| 1940 | Before I Hang as Dr. John Garth |
| 1940 | Doomed to Die as James Lee Wong |
| 1940 | The Man with Nine Lives as Dr. Leon Kravaal |
| 1940 | Black Friday as Dr. Ernest Sovac |
| 1940 | The Fatal Hour as James Lee Wong |
| 1939 | Tower of London as Mord |
| 1939 | British Intelligence as Valdar |
| 1939 | The Man They Could Not Hang as Dr. Henryk Savaard |
| 1939 | Mr. Wong in Chinatown as Mr. James Lee Wong |
| 1939 | The Mystery of Mr. Wong as James Lee Wong |
| 1939 | Son of Frankenstein as The Monster |
| 1939 | Devil's Island as Dr. Charles Gaudet |
| 1938 | Mr. Wong, Detective as James Lee Wong |
| 1938 | The Invisible Menace as Jevries |
| 1937 | Breakdowns of 1937 as Self |
| 1937 | West of Shanghai as Wu Yen Fang |
| 1937 | Night Key as David Mallory |
| 1937 | Cinema Circus as Himself |
| 1936 | Charlie Chan at the Opera as Gravelle |
| 1936 | The Man Who Changed His Mind as Dr. Laurience |
| 1936 | Juggernaut as Dr. Victor Sartorius |
| 1936 | The Walking Dead as John Ellman |
| 1936 | The Invisible Ray as Dr. Janos Rukh |
| 1935 | The Black Room as Baron Gregor de Berghman / Anton de Berghman |
| 1935 | The Raven as Edmond Bateman |
| 1935 | Hollywood Hobbies as Himself |
| 1935 | Frankenstein’in Gelini as The Monster |
| 1934 | Gift of Gab as Himself |
| 1934 | Kara Kedi as Hjalmar Poelzig |
| 1934 | The House of Rothschild as Count Ledrantz |
| 1934 | The Lost Patrol as Sanders |
| 1934 | Screen Snapshots No. 11 as Himself |
| 1933 | The Ghoul as Prof. Morlant |
| 1932 | Ölmeyen Mumya as Imhotep, alias Ardath Bey |
| 1932 | Boo as Frankenstein's Monster (edited from "Frankenstein") |
| 1932 | The Mask of Fu Manchu as Dr. Fu Manchu |
| 1932 | Eski Karanlık Ev as Morgan |
| 1932 | Skyscraper Souls as Man Approaching Ticket Counter |
| 1932 | Night World as 'Happy' MacDonald |
| 1932 | Yaralı Yüz as Gaffney |
| 1932 | The Miracle Man as Nikko |
| 1932 | The Cohens and Kellys in Hollywood as Boris Karloff |
| 1932 | Behind the Mask as Jim Henderson |
| 1932 | Business and Pleasure as Sheik Ali Ben Joseph (uncredited) |
| 1931 | Frankeştayn as The Monster |
| 1931 | The Guilty Generation as Tony Ricca |
| 1931 | The Yellow Ticket as Drunken Orderly |
| 1931 | The Mad Genius as Fedor's Father (uncredited) |
| 1931 | Five Star Final as T. Vernon Isopod |
| 1931 | Graft as Terry |
| 1931 | I Like Your Nerve as Luigi - Pacheco's Butler |
| 1931 | The Public Defender as The Professor |
| 1931 | Smart Money as Sport Williams |
| 1931 | Young Donovan's Kid as Cokey Joe |
| 1931 | The Vanishing Legion as The Voice (voice) |
| 1931 | Cracked Nuts as Boris - First Revolutionary |
| 1931 | King of the Wild as Mustapha |
| 1931 | Tonight or Never as Waiter |
| 1931 | The Criminal Code as Ned Galloway |
| 1930 | The Utah Kid as Henchman Baxter |
| 1930 | The Sea Bat as Corsican |
| 1930 | The Bad One as Monsieur Gaston |
| 1929 | The Unholy Night as Abdul Mohammed Bey - the Hindu Lawyer (uncredited) |
| 1929 | The King of the Kongo as Scarface Macklin |
| 1929 | Behind That Curtain as Beetham's Manservent |
| 1929 | The Phantom of the North as Jules Gregg |
| 1929 | Anne Against the World |
| 1929 | Two Sisters as Cecil |
| 1929 | The Devil's Chaplain as Boris |
| 1929 | The Fatal Warning as Mullins |
| 1929 | Burning the Wind as Pug Doran |
| 1928 | The Little Wild Girl as Maurice Kent |
| 1928 | Vultures of the Sea as Grouchy |
| 1928 | The Vanishing Rider as The Villain |
| 1928 | Sharp Shooters as Cafe Proprietor (uncredited) |
| 1927 | The Love Mart as Fleming |
| 1927 | Two Arabian Knights as Purser |
| 1927 | Soft Cushions as The Chief Conspirator |
| 1927 | The Phantom Buster as Ramon |
| 1927 | The Meddlin' Stranger as Al Meggs |
| 1927 | Tarzan and the Golden Lion as Owaza |
| 1927 | The Princess from Hoboken as Pavel |
| 1927 | Let It Rain as Crook |
| 1926 | Old Ironsides as Saracen Guard (uncredited) |
| 1926 | Flaming Fury as Gaspard |
| 1926 | The Nickel-Hopper as Dance Hall Masher |
| 1926 | The Eagle of the Sea as Pirate (uncredited) |
| 1926 | Flames as Blackie Blanchette |
| 1926 | The Golden Web as Dave Sinclair |
| 1926 | The Bells as The Mesmerist |
| 1926 | Her Honor, the Governor as Snipe Collins |
| 1926 | The Man in the Saddle as Robber (uncredited) |
| 1926 | The Greater Glory as Scissors Grinder |
| 1925 | Without Mercy as Madame Gordon's 2nd Henchman (uncredited) |
| 1925 | Parisian Nights as Pierre |
| 1925 | Never the Twain Shall Meet |
| 1925 | Perils of the Wild |
| 1925 | Lady Robinhood as Cabraza |
| 1925 | The Prairie Wife as Diego |
| 1925 | Forbidden Cargo as Pietro Castillano |
| 1924 | Dynamite Dan as Tony Garcia |
| 1924 | Riders of the Plains |
| 1924 | The Hellion as The Outlaw |
| 1924 | The White Panther as Shere Ali's Aide (as Karloff Boris) |
| 1923 | The Prisoner as Prince Kapolski |
| 1922 | Omar the Tentmaker as Imam Mowaffak |
| 1922 | The Altar Stairs as Hugo |
| 1922 | The Woman Conquers as Raoul Maris |
| 1922 | The Infidel as The Nabob |
| 1922 | The Man from Downing Street as Maharajah Jehan |
| 1922 | Nan of the North as Undetermined Role (uncredited) |
| 1921 | The Cave Girl as Baptiste |
| 1921 | Cheated Hearts as Nei Hamid |
| 1921 | Without Benefit of Clergy as Ahmed Khan |
| 1921 | The Hope Diamond Mystery as Priest of Kama-Sita / Dakar |
| 1920 | The Last of the Mohicans as Indian (uncredited) |
| 1920 | The Courage of Marge O'Doone as Tavish |
| 1920 | The Deadlier Sex as Jules Borney |
| 1919 | The Prince and Betty as Undetermined Role |
| 1919 | His Majesty, the American as Henchman in cloth cap |
| 1919 | The Lightning Raider |
Duvar