| 2026 | Bookends | Saul Cohen |
| 2025 | This Ordinary Thing | Self (voice) |
| Milarepa | Oyun |
| Chiến Dịch Phoenicia | Prophet |
| 2024 | Mother, Couch | Marcus / Marco |
| 2023 | Double Soul | Mentor |
| 2022 | Cây Sáo Ma Thuật | Dr. Longbow |
| The Siege of Vienna | — |
| An Oral History of: The Name of the Rose | Self (archive footage) |
| Marvel Studios Assembled: The Making of Moon Knight | Khonshu (voice) (archive footage) (uncredited) |
| 2021 | Mắt thấy, tai nghe | Floyd DeBeers |
| 2019 | Tiểu Thư và Gã Lang Thang | Tony |
| Salman Rushdie : la mort aux trousses | Ayatollah (archive footage) |
| Bí Kíp Luyện Rồng: Vùng Đất Bí Ẩn | Grimmel (voice) |
| 2018 | The Letter | Narrator |
| Robin Hood: Siêu Trộm Lừng Danh | Cardinal |
| Super Cats | Narrator (voice) |
| Every Act of Life | Self |
| Đảo Của Những Chú Chó | Jupiter (voice) |
| 2015 | 411 | Information (voice) |
| 2014 | A Little Game | Norman Wallach |
| Inside 'Inside Llewyn Davis' | Self |
| Khách Sạn Đế Vương | Mr. Moustafa |
| Il mistero di Dante | Dante Alter Ego |
| 2013 | Hành Trình Của Đam Mê | Bud Grossman |
| Ti ho cercata in tutti i necrologi | Braque |
| Love, Marilyn | Self |
| Kẻ Báo Thù | Gregor |
| 2012 | Goltzius & the Pelican Company | The Margrave |
| 11 settembre 1683 | Marco D'Aviano |
| The Unseen World | John Henry Newman |
| 2011 | Is That Skunk? | Narrator |
| 2010 | Nature Amazing Places Hawaii | Narrates Program One |
| Hummingbirds: Magic in the Air | — |
| In the Valley of the Wolves | Narrator |
| 2009 | Barbarossa | Siniscalco Barozzi |
| Miloš Forman: Co tě nezabije… | Self |
| Perestroika | Professor Gross |
| The Dragon Chronicles | Narrator |
| 2008 | Carnera: The Walking Mountain | Leon See |
| Shark Swarm | Professor Bill Girdler |
| A House Divided | Grandfather Wahid |
| Ballerina | Goran |
| 2007 | The Beauty of Ugly | Self - Narrator (voice) |
| Lobo: The Wolf That Changed America | Narrator |
| Blood Monkey | Professor Hamilton |
| Come le formiche | Ruggero |
| L'inchiesta | Nathan |
| 2006 | Тихий Дон | Pantaley |
| Il mercante di pietre | Shahid |
| Peperoni ripieni e pesci in faccia | Jeffrey |
| 40 Years of Star Trek | Self |
| 2004 | The Bridge of San Luis Rey | Viceroy of Peru |
| Le Nom de la Rose : Le Documentaire | — |
| 2003 | My Father, Rua Alguem 5555 | Paul Minsky |
| Try to Remember: The Fantasticks | Self |
| Piazza delle cinque lune | Entita |
| 2002 | Ticker | Airport Guru |
| The Making of 'Amadeus' | Self - Salieri |
| Joshua | Father Tardone |
| 2001 | 13 Oan Hồn | Cyrus |
| I Cavalieri Che Fecero L'Impresa | Delfinello da Coverzano |
| 2000 | Un dono semplice | Thomas Barlow |
| Finding Forrester | Robert Crawford |
| The Darkling | Bruno Rubin |
| The Directors: Milos Forman | Self |
| 1999 | Excellent Cadavers | Tommaso Buscetta |
| Muppets from Space | Noah |
| Noah's Ark | Lót |
| Esther | Mordechai |
| The All New Adventures of Laurel & Hardy in For Love or Mummy | Professor Henry Covington |
| 1998 | Star Trek: Khởi Nghĩa | Ad'har Ru'afo |
| Waiting for Godot in San Quentin | Himself |
| 1997 | Una vacanza all'inferno | Belisario |
| Einstein Revealed | Narrator |
| Color of Justice | Jim Sullivan |
| Gián Khổng Lồ | Dr. Gates |
| Eruption | President Mendoza |
| 1996 | Children of the Revolution | Josef 'Uncle Joe' Stalin |
| Puma: Lion of the Andes | Narrator (voice) |
| Looking for Richard | Self |
| Baby Face Nelson | Al Capone |
| 1995 | Mighty Aphrodite | Chorleiter |
| Dillinger and Capone | Al Capone |
| 1994 | Nostradamus | Scalinger |
| Fresh | Chess Hustler |
| Surviving the Game | Wolfe, Sr. |
| L'Affaire | Lucien Haslans |
| Jamila | Older Seit |
| 1993 | Sweet Killing | Zargo |
| Cuộc Phiêu Lưu Vào Lòng Đất | Professor Harlech |
| Người Hùng Cuối Cùng | John Practice |
| National Lampoon's Loaded Weapon 1 | Harold Leacher |
| 1992 | Through an Open Window | Narrator |
| The First Circle | Stalin |
| 1991 | Eye of the Widow | Kharoun |
| By the Sword | Suba |
| Mobsters | Arnold Rothstein |
| Money | Will Scarlet |
| 1990 | The Bonfire of the Vanities | D.A. Abe Weiss (uncredited) |
| La batalla de los tres reyes | Osrain |
| The Little Match Girl | Narrator (voice) |
| Cadence | Capt. Ramon Garcia |
| A Season of Giants | Papa Giulio II |
| Performance Pieces | Jack Narwhal |
| Largo Desolato | Professor Leopold Nettles |
| 1989 | The Making of Slipstream | — |
| An Innocent Man | Virgil Cane |
| The Favorite | Abdul Hamid |
| Slipstream | Cornelius |
| Beyond the Stars | Dr. Harry Bertram - the Whale Man |
| 1988 | Il Trovatore | Self - Host |
| The Great San Francisco Earthquake | Self - Narrator (voice) |
| Russicum - I giorni del diavolo | Father Carafa |
| 1987 | La rosa dei nomi | Self |
| 1986 | Die Abtei des Verbrechens - Umberto Ecos „Der Name der Rose“ wird verfilmt | Self |
| Án Mạng Trong Tu Viện | Bernardo Gui |
| 1985 | Herman Melville: Damned in Paradise | Herman Melville |
| 1984 | Stato d'emergenza - Il caso Dozier | Goldstein |
| Sự Đố Kỵ Của Thiên Tài | Antonio Salieri |
| 1983 | Ông Trùm Mặt Sẹo | Omar |
| 1978 | The Big Fix | Eppis |
| Madman | Marco Cohen |
| 1977 | Sex and the Married Woman | Duke Skaggs |
| 1976 | The Ritz | Chris |
| Đoàn Tùy Tùng Tổng Thống | Arresting Officer #1 |
| 1975 | The Sunshine Boys | Mechanic |
| The Prisoner of Second Avenue | Taxi Driver |
| 1973 | Serpico | Detective Partner (uncredited) |
| 1971 | They Might Be Giants | Clyde (the usher) |