| Elegies for Angels, Punks and Raging Queens (2020) Nat |
| Finding Julia (2019) Igor |
| Nightmare Cinema (2018) Dr. Mirari |
| The Black Ghiandola (2017) Creepy Oncologist |
| Justice League: Gods and Monsters (2015) Highfather (voice) |
| Electric Boogaloo: The Wild, Untold Story of Cannon Films (2014) Self - Actor |
| Christmas Around The World With Perry Como (2012) Self |
| Christmas Around the World with Perry Como (2012) Self |
| We Are the Hartmans (2012) Mr. Hartman |
| Three Days of Hamlet (2012) |
| The Perfect Family (2011) Monsignor Murphy |
| Strength and Honour (2007) Denis O'Leary |
| I Now Pronounce You Chuck & Larry (2007) Councilman Banks |
| Japan: Memoirs of a Secret Empire (2004) Narrator |
| The Making of Shōgun (2003) |
| The Pavilion (2000) Huddlestone |
| River Made to Drown In (1997) Thaddeus MacKenzie |
| All the Winters that Have Been (1997) Dane Corvin |
| Barbara Stanwyck: Straight Down The Line (1997) Self (archive footage) |
| The Lost Daughter (1997) Andrew McCracken |
| Bird of Prey (1996) Jonathan Griffith |
| The Thorn Birds: The Missing Years (1996) Ralph de Bricassart |
| Ordeal in the Arctic (1993) Captain John Couch |
| Barbara Stanwyck: Fire and Desire (1991) Self (archive footage) |
| Night of the Hunter (1991) Harry Powell |
| Aftermath: A Test of Love (1991) Ross Colburn |
| The Return of the Musketeers (1989) Aramis |
| The Bourne Identity (1988) Jason Bourne |
| Casanova (1987) Giacomo Casanova |
| Allan Quatermain and the Lost City of Gold (1986) Allan Quatermain |
| King Solomon's Mines (1985) Allan Quatermain |
| Wallenberg: A Hero's Story (1985) Raoul Wallenberg |
| Cook & Peary: The Race to the Pole (1983) Frederick Cook |
| Murder by Phone (1982) Nat Bridger |
| Night of 100 Stars (1982) Self |
| Musical Comedy Tonight (1979) |
| The Good Doctor (1978) Anton Chekhov / Various Roles |
| The Swarm (1978) Dr. Hubbard |
| Inside 'the Swarm' (1978) Self |
| The Last Wave (1977) David Burton |
| The Man in the Iron Mask (1977) Louis XIV / Philippe |
| The Slipper and the Rose (1976) Prince Edward |
| The Count of Monte-Cristo (1975) Edmond Dantès |
| The Towering Inferno (1974) Simmons |
| The Lady's Not for Burning (1974) Thomas Mendip |
| The Four Musketeers (1974) Aramis |
| F. Scott Fitzgerald and the Last of the Belles (1974) F. Scott Fitzgerald |
| The Little Mermaid (1974) Narrator |
| The Three Musketeers (1973) Aramis |
| Lady Caroline Lamb (1972) George Gordon, Lord Byron |
| The Woman I Love (1972) King Edward VIII |
| The Music Lovers (1971) Pyotr Ilyich Tchaikovsky |
| Julius Caesar (1970) Octavius Caesar / Augustus |
| The Madwoman of Chaillot (1969) The Reverend |
| Petulia (1968) Dave Danner |
| Joy in the Morning (1965) Carl Brown |
| Twilight of Honor (1963) David Mitchell |
| A Thunder of Drums (1961) Lt. Porter |
| The Secret of the Purple Reef (1960) Dean Christopher |
| Endangered Hawaiʻi Narrator |