| 2028 | Charmed Lives: A Family Romance | Self (archive footage) |
| 2026 | War of the Worlds | narrator |
| 2026 | The Making Of | Self (archival) |
| 2026 | Proust Palimpsesto: Pastiches e Misturas | Self / The Director / Sir John Falstaff (archive footage) (uncredited) |
| 2025 | WeirdWorld | Troy2000 (Archive footage) |
| 2025 | Human Nature in Eleven Parts | Narrator "The Scorpion and the Frog" (archive footage) |
| 2025 | The Scorpion and the Frog | Narrator (archive footage) |
| 2024 | Othelo The Great | Self (archive footage) |
| 2024 | The Battle of Grovers Mill | Radio Host (voice) (archival footage) |
| 2024 | Aliens Uncovered: Close Encounters | Self |
| 2024 | Jim Henson Idea Man | Self (archive footage) |
| 2023 | From Introduction to Orson Welles’s Falstaff: Chimes at Midnight | Falstaff |
| 2023 | It's Pretty, but is it Art? | Self (voiceover) |
| 2023 | Looking Back Before You Leap | General Zaroff (voice) |
| 2022 | Clint Eastwood: The Last Legend | Self (archive footage) |
| 2022 | American: An Odyssey to 1947 | Self (archive footage) |
| 2022 | Louis Armstrong's Black & Blues | Self (archive footage) |
| 2022 | The Welles Raft | Himself (Archive Footage) |
| 2021 | My Guest is Orson Welles | |
| 2021 | The Real Charlie Chaplin | Self (archive footage) |
| 2021 | Tall Tales: The Ireland of Orson Welles | Self |
| 2021 | Parkinson at 50 | Self (archive footage) |
| 2021 | Morceaux de Cannes | Self (archive footage) |
| 2021 | Street Gang: How We Got to Sesame Street | Self (archive footage) (uncredited) |
| 2021 | The Blinding of Isaac Woodard | Self (archive footage) |
| 2020 | Hopper/Welles | Self |
| 2020 | Natalie Wood: What Remains Behind | Self (archive footage) |
| 2019 | Emergency: Donald Trump’s "Touch of Evil" | (archive footage) |
| 2018 | The Other Side of the Wind | Journalist (uncredited) |
| 2018 | They'll Love Me When I'm Dead | Self (archive footage) |
| 2018 | The Eyes of Orson Welles | Self - Filmmaker / Various Roles (archive footage) |
| 2018 | Jeanne Moreau: Free Spirit | Self - Filmmaker (archive footage) |
| 2017 | The Magic History of Cinema | |
| 2016 | Embers & Dust | Professor Richard Pierson / Self (voice) (archive sound) |
| 2016 | Decadence and Downfall: The Shah of Iran's Ultimate Party | Self (archive footage) (voice) |
| 2015 | This Is Orson Welles | Self |
| 2014 | Magician: The Astonishing Life and Work of Orson Welles | Self - Filmmaker / Various Roles (archive footage) |
| 2014 | Alfonso Sansone: Producer by Chance | Self (archive footage) |
| 2013 | Too Much Johnson | Keystone Kop (uncredited) |
| 2013 | Jodorowsky's Dune | Self - Filmmaker (archive footage) |
| 2012 | Magic Mirror Maze | |
| 2012 | The Shadow Knows | Self (archive footage) |
| 2012 | Final Cut: Ladies and Gentlemen | (archive footage) |
| 2011 | Shut Up Little Man! An Audio Misadventure | Self |
| 2010 | Jucy | Elephant Lamp (archive sound) |
| 2010 | Cameraman: The Life and Work of Jack Cardiff | Genghis Khan / Bayan (archive footage) |
| 2010 | Orson Welles: The Paris Interview | Himself |
| 2009 | Hollywood sul Tevere | |
| 2009 | Lucifer et moi | (archive footage 1982) |
| 2007 | Spine Tingler! The William Castle Story | Self (archive) |
| 2007 | The Deep | Russ Brewer |
| 2005 | Lost in "The Thinking" | Self (archive footage) |
| 2005 | Orson Welles Talks With Roger Hill | (Self) |
| 2005 | Filmmakers vs. Tycoons | Self (archive footage) |
| 2005 | The Other Side of Welles | Self (archive footage) |
| 2005 | The Well | |
| 2005 | Orson Welles Uncut | |
| 2004 | The Hitch Hiker | Ronald Adams |
| 2004 | The UFO Conspiracy | Self (archive sound) |
| 2003 | The Dominici Affair by Orson Welles | Self (archive footage) |
| 2002 | Filming 'The Trial' | Self |
| 2002 | Heart of the Festival | Self (archive footage) |
| 2002 | Lost in La Mancha | Self (archive footage) |
| 2002 | The Movie Movie (An Excerpt) | (archive footage) |
| 2001 | A Huey P. Newton Story | Self (archive footage) (uncredited) |
| 2001 | The Paranormal Peter Sellers | Self (Archive footage) |
| 2001 | NASA: A Space Odyssey Vol. 3 | Narrator |
| 2000 | Orson Welles in the Land of Don Quixote | Self (Archive footage) |
| 2000 | Lon Chaney: A Thousand Faces | Self (archive footage) |
| 2000 | Moby Dick | Captain Ahab / Starbuck / Ishmael (archive footage) |
| 1999 | One Man Band | Presenter / Various |
| 1999 | According to Occam's Razor | |
| 1999 | Hi-Fi | |
| 1998 | The Best of the Dean Martin Celebrity Roasts | Self - Roaster (archive footage) |
| 1997 | It's All Brazil | Self (archive footage) |
| 1997 | Who Is Henry Jaglom? | Self (archive footage) |
| 1997 | Celebração - 100 Anos do Cinema Nacional | Self |
| 1996 | The Battle Over Citizen Kane | Self (archive footage) |
| 1995 | Orson Welles: The One-Man Band | Self (archive footage) |
| 1995 | The First 100 Years: A Celebration of American Movies | Self (archive footage) |
| 1993 | La Classe américaine | Self (archive footage) |
| 1993 | It's All True | Self |
| 1993 | Rosabella - La storia italiana di Orson Welles | |
| 1993 | Working with Orson Welles | Himself (Archive Footage) |
| 1992 | Don Quixote | Self |
| 1991 | The Complete 'Citizen Kane' | Self (archive footage) |
| 1991 | Empire of the Air: The Men Who Made Radio | Self - Professor in War of the Worlds Broadcast (archive sound) |
| 1990 | With Orson Welles: Stories from a Life in Film | Self (archive footage) |
| 1990 | Welles' Language | Self (archive footage) |
| 1990 | Rita Hayworth: Dancing Into the Dream | Self (archive footage) |
| 1988 | On the tracks of a filmmaker | Orson Welles |
| 1987 | Someone to Love | Danny's Friend |
| 1986 | Unseen Lollo | Himself |
| 1986 | It's Not All True | Himself (archive footage) |
| 1986 | The Transformers: The Movie | Unicron (voice) |
| 1986 | The Muppets: A Celebration of 30 Years | Self (archive footage) |
| 1985 | The Dreamers | Marcus Kleek |
| 1985 | Orson Welles' Magic Show | Self |
| 1984 | The Dean Martin Celebrity Roast: Michael Landon | Self |
| 1984 | Almonds and Raisins | Narrator |
| 1984 | The Road to Bresson | Self |
| 1984 | The Last Sailors: The Final Days of Working Sail | Narrator |
| 1984 | In Our Hands | Himself |
| 1984 | The Spirit of Charles Lindbergh | himself |
| 1984 | Where Is Parsifal? | Klingsor |
| 1983 | The Witching | Mr. Cato |
| 1983 | Can She Bake a Cherry Pie? | Magician (uncredited) |
| 1983 | The Psychic Connection | Narrator |
| 1983 | King Penguin: Stranded Beyond the Falklands | Self - Narrator |
| 1983 | Orson Welles at the Cinémathèque Française | Himself |
| 1983 | Hot Money | Sheriff Paisley |
| 1982 | Slapstick of Another Kind | Aliens' Father (voice) (uncredited) |
| 1982 | Wagner e Venezia | Richard Wagner (voice) |
| 1982 | Natalie - A Tribute to a Very Special Lady | Self |
| 1982 | The Orson Welles Story | Self |
| 1982 | Baryshnikov in Hollywood | Self - Narrator |
| 1982 | Genocide | Narrator (voice) |
| 1982 | Night of 100 Stars | Self |
| 1982 | Doug Henning's World of Magic | Self - Special Guest |
| 1982 | Butterfly | Judge Rauch |
| 1982 | Let Poland Be Poland | Self |
| 1982 | Magic with the Stars | Self - Host |
| 1982 | The Quest for Fire Adventure | Narrator |
| 1981 | A Gift of Harvest | Narrator |
| 1981 | Brasil | Self (archive footage) |
| 1981 | Search for the Titanic | Self - Host |
| 1981 | History of the World: Part I | Narrator (voice) |
| 1981 | The Man Who Saw Tomorrow | Presenter / Narrator (voice) |
| 1980 | Franklin D. Roosevelt Four Freedoms Park | Narrator |
| 1980 | The Secret of Nikola Tesla | J.P. Morgan |
| 1980 | A Step Away | English Narrator |
| 1980 | The Greenstone | Narrator (voice) |
| 1979 | The New Media Bible: Book of Genesis | Narrator |
| 1979 | Frank Sinatra: The First 40 Years | Self |
| 1979 | To Try Again... and Succeed | Narrator (voice) |
| 1979 | Filming Othello | Host |
| 1979 | The Muppet Movie | Lew Lord |
| 1979 | The Double McGuffin | Narrator (voice) |
| 1979 | The Orson Welles Show | Self |
| 1979 | The Greatest Adventure--The Story of Man's Voyage to the Moon | Narrator |
| 1978 | Orson Welles at The Magic Castle | Self |
| 1978 | The Biggest Battle | Narratore |
| 1978 | The Late Great Planet Earth | Self |
| 1978 | Mysterious Castles of Clay | Narrator |
| 1978 | Caesar's Guide to Gaming with Orson Welles | Himself |
| 1977 | It Happened One Christmas | Henry F. Potter |
| 1977 | The Lions of Capitalism: Some Call It Greed | Narrator |
| 1977 | The Force Beyond | Himself (archive footage) |
| 1977 | Tut: The Boy King | Himself - Host |
| 1977 | Hot Tomorrows | Parklawn Mortuary (voice) |
| 1977 | The Shirley MacLaine Special: Where Do We Go from Here? | Self |
| 1977 | The Rime of the Ancient Mariner | Narrator |
| 1977 | From Fiber to Fabric: Wool's a Natural | Narrator |
| 1976 | Voyage of the Damned | José Estedes |
| 1976 | NBC: The First Fifty Years | Self / Narrator |
| 1976 | The New Deal for Artists | Narrator (voice) |
| 1976 | Bugs Bunny Superstar | Narrator (voice) |
| 1976 | A Mother's Tale | Narrator |
| 1975 | Brother, Can You Spare a Dime? | Self (archive footage) |
| 1975 | Orson Welles - Das vermarktete Genie | Self |
| 1975 | Magnificent Monsters of the Deep | Narrator |
| 1975 | Rikki-Tikki-Tavi | Narrator / Nag / Chuchundra (voice) |
| 1975 | Who's Out There? | Host |
| 1974 | The Challenge... A Tribute to Modern Art | Narrator |
| 1974 | A Legend a Lifetime: Citizen Welles | |
| 1974 | And Then There Were None | Voice on Tape |
| 1974 | Letter to Jane: An Investigation About a Still | Self (archive footage) (uncredited) |
| 1973 | Power and Corruption | Himself |
| 1973 | The Monkey's Paw | Host |
| 1973 | Kelly Country | Narrator |
| 1973 | F for Fake | Self |
| 1973 | The Battle of Sutjeska | Winston Churchill |
| 1973 | The Cave | Narrator |
| 1972 | The Man Who Came to Dinner | Sheridan Whiteside |
| 1972 | Treasure Island | Long John Silver |
| 1972 | Necromancy | Mr. Cato |
| 1972 | Get to Know Your Rabbit | Mr. Delasandro |
| 1972 | Malpertuis | Cassavius |
| 1972 | Jeanne Moreau : Vive le cinéma ! | Self |
| 1972 | Future Shock | Narrator |
| 1971 | Ten Days' Wonder | Théo Van Horn |
| 1971 | A Safe Place | The Magician |
| 1971 | Directed by John Ford | Narrator (voice) |
| 1971 | Sentinels of Silence | |
| 1971 | Flame of Persia | Narrator |
| 1971 | Freedom River | Narrator |
| 1970 | An Evening with Orson Welles: The Golden Honeymoon | |
| 1970 | An Evening with Orson Welles: The Happy Prince | |
| 1970 | An Evening with Orson Welles: American Heritage, Vol. I – Selections from George Ade, Thomas Wolfe, Mark Twain | |
| 1970 | An Evening with Orson Welles: American Heritage, Vol. II – Clarence Darrow | |
| 1970 | An Evening with Orson Welles: Two Wise Old Men – Socrates and Noah | |
| 1970 | An Evening with Orson Welles: My Little Boy | |
| 1970 | Is It Always Right to Be Right? | Narrator |
| 1970 | Waterloo | Louis XVIII |
| 1970 | The Enemy Before Us | Narrator |
| 1970 | Catch-22 | Brigadier General Dreedle |
| 1970 | Start the Revolution Without Me | The Narrator |
| 1970 | The Kremlin Letter | Bresnavitch |
| 1970 | Upon This Rock | Michelangelo (voice) |
| 1970 | A Horse Called Nijinsky | Narrator |
| 1970 | The Merchant of Venice (Rushes) | Shylock |
| 1969 | Soft Self-Portrait of Salvador Dali | Narrator (voice) |
| 1969 | The Merchant of Venice | Shylock |
| 1969 | Twelve Plus One | Markan |
| 1969 | The Battle of Neretva | Četnik |
| 1969 | The Southern Star | Plankett |
| 1969 | The Fight for Rome II - The Betrayal | Justinian |
| 1969 | Tepepa | Colonel Cascorro |
| 1969 | To Build a Fire | Narrator (voice) |
| 1968 | The Fight for Rome | Justinian |
| 1968 | The Immortal Story | Charles Clay |
| 1968 | House of Cards | Leschenhaut |
| 1968 | Around the World of Mike Todd | Self - Narrator |
| 1968 | Portrait: Orson Welles | Self |
| 1968 | Oedipus the King | Tiresias |
| 1968 | Vienna | Himself |
| 1967 | I'll Never Forget What's'isname | Jonathan Lute |
| 1967 | Beggars Would Ride | Narrator |
| 1967 | Disorder Is 20 Years Old | Self |
| 1967 | Casino Royale | Le Chiffre |
| 1967 | The Sailor from Gibraltar | Louis de Mozambique |
| 1967 | Ten Days That Shook the World | Narrator |
| 1966 | A Man for All Seasons | Cardinal Wolsey |
| 1966 | Is Paris Burning? | Konsul Nordling |
| 1966 | Orson Welles in Spain | Himself |
| 1965 | Chimes at Midnight | Falstaff |
| 1965 | Miss Goodall and the Wild Chimpanzees | Self - Narrator (voice) |
| 1965 | Americans on Everest | Narrator- Self |
| 1965 | Marco the Magnificent | Akerman, Marco's Teacher |
| 1965 | Profile No. 6: Orson Welles | |
| 1965 | A King's Story | Narrator |
| 1964 | The Finest Hours | Narrator (voice) |
| 1963 | The V.I.P.s | Max Buda |
| 1963 | La ricotta | |
| 1963 | Ro.Go.Pa.G. | The 'Director' (segment "La ricotta") |
| 1962 | River of the Ocean | Narrator (English) |
| 1962 | The Trial | Albert Hastler |
| 1962 | Lafayette | Benjamin Franklin |
| 1961 | King of Kings | Narrator (voice) (uncredited) |
| 1961 | The Tartars | Burundai |
| 1960 | Austerlitz | Robert Fulton |
| 1960 | An Arabian Night | Storyteller |
| 1960 | Crack in the Mirror | Hagolin / Lamerciere |
| 1960 | Five Columns on the Front Page: Hong Kong as seen by Orson Welles | Self (narrator) |
| 1960 | David and Goliath | King Saul |
| 1959 | High Journey | Narrator |
| 1959 | Ferry to Hong Kong | Captain Hart |
| 1959 | Compulsion | Jonathan Wilk |
| 1958 | Lords of the Forest | Narrator (voice) |
| 1958 | The Roots of Heaven | Cy Sedgewick |
| 1958 | The Fountain of Youth | the narrator |
| 1958 | Orson Welles at Large: Portrait of Gina | Self - Host |
| 1958 | South Seas Adventure | Narrator |
| 1958 | The Vikings | Narrator (voice) (uncredited) |
| 1958 | The Long, Hot Summer | Will Varner |
| 1958 | Touch of Evil | Police Captain Hank Quinlan |
| 1957 | Man in the Shadow | Virgil Renchler |
| 1956 | Out of Darkness | Self - Narrator |
| 1956 | Moby Dick | Father Mapple |
| 1956 | Orson Welles and People: Camille, the Naked Lady and the Musketeers | Self - Narrator (voice) |
| 1955 | The Land of the Basques | Himself |
| 1955 | Mr. Arkadin | Gregory Arkadin |
| 1955 | Moby Dick—Rehearsed | An Actor Manager /Father Mapple /Ahab |
| 1955 | Napoleon | Sir Hudson Lowe |
| 1955 | Three Cases of Murder | Lord Mountdrago ("Lord Mountdrago" segment) |
| 1954 | Trouble in the Glen | Sanin Cejador y Mengues |
| 1953 | Royal Affairs in Versailles | Benjamin Franklin |
| 1953 | King Lear | King Lear |
| 1953 | Man, Beast and Virtue | Captain Perella, the Beast |
| 1952 | Return to Glennascaul | Narrator |
| 1952 | Trent's Last Case | Sigsbee Manderson |
| 1951 | Othello | Othello |
| 1950 | Disorder | Self |
| 1950 | The Black Rose | Bayan |
| 1950 | The Miracle of St. Anne | The Director |
| 1949 | Prince of Foxes | Cesare Borgia |
| 1949 | The Third Man | Harry Lime |
| 1949 | Black Magic | Joseph Balsamo aka Count Cagliostro |
| 1948 | Macbeth | Macbeth |
| 1947 | The Lady from Shanghai | Michael O'Hara |
| 1946 | Duel in the Sun | Narrator (voice) (uncredited) |
| 1946 | Battle for Survival | Narrator |
| 1946 | The Stranger | Prof. Charles Rankin |
| 1946 | Tomorrow Is Forever | John Andrew MacDonald |
| 1945 | Mexico City, Old and New | Narrator |
| 1944 | Follow the Boys | Orson Welles (uncredited) |
| 1944 | Know Your Ally: Britain | Narrator/Bob (helpful taxi passenger) |
| 1943 | Jane Eyre | Edward Rochester |
| 1943 | Show-Business at War | Self |
| 1943 | Journey into Fear | Colonel Haki |
| 1942 | The Magnificent Ambersons | Narrator (voice) |
| 1941 | Citizen Kane | Charles Foster Kane |
| 1940 | Swiss Family Robinson | Opening Narrator (uncredited) |
| 1939 | The Green Goddess | Rajah/Narrator |
| 1937 | The Spanish Earth | Narrator (voice) |
| 1934 | The Hearts of Age | Death |
| 1933 | Twelfth Night | Narrator |