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- Poor Cow (1967) as Billy (scenes deleted)
- if.... (1968) as Mick
- Figures in a Landscape (1970) as Ansell
- The Raging Moon (1971) as Bruce Pritchard
- A Clockwork Orange (1971) as Alex DeLarge
- O Lucky Man! (1973, also writer) as Mick Travis / Plantation Thief
- Royal Flash (1975) as Captain Harry Flashman
- Aces High (1976) as Gresham
- Voyage of the Damned (1976) as Max Gunter
- Laurence Olivier Presents: The Collection (TV, 1976) as Bill
- She Fell Among Thieves (TV, 1978) as Richard Chandos
- The Passage (1979) as Capt. Von Berkow
- Caligula (1979) as Caligula
- Time After Time (1979) as H.G. Wells
- Look Back in Anger (1980) as Jimmy Porter
- Cat People (1982) as Paul Gallier
- Britannia Hospital (1982) as Mick Travis: The Media
- The Compleat Beatles (1982) as Narrator (voice)
- Blue Thunder (1983) as Col. F.E. Cochrane
- Cross Creek (1983) as Max Perkins
- Get Crazy (1983) as Reggie Wanker
- Faerie Tale Theatre's Little Red Riding Hood (TV, 1983) as Reginald Von Lupin / The Wolf
- Arthur the King (TV, 1985) as King Arthur
- Gulag (TV, 1985) as The Englishman
- Monte Carlo (TV, 1986) as Christopher Quinn
- The Caller (1987) as The Caller
- Buy & Cell (1987) as Warden Tennant
- Sunset (1988) as Alfie Alperin
- Mortacci (1989) as Edmondo
- Il Maestro (1989) as Walter Goldberg
- Moon 44 (1990) as Major Lee
- Class of 1999 (1990) as Dr. Miles Langford
- Maggio musicale (1990) as Pier Francesco Ferraioli
- In the Eye of the Snake (1990) as Professor Baldwin
- Jezebel's Kiss (1990) as Benjamin J. Faberson
- Disturbed (1990) as Dr. Derrek Russell
- Schweitzer (1990) as Albert Schweitzer
- The Assassin of the Tsar (1991) as Timofeyev / Yurovsky
- Tales from the Crypt: The Reluctant Vampire (TV, 1991) as Donald Longtooth
- The Player (1992) as Himself
- Chain of Desire (1992) as Hubert Bailey
- Vent d'est (1993) as General Smyslovsky
- Bopha! (1993) as De Villiers
- The Man Who Wouldn't Die (TV, 1994) as Bernard Drake / Ian Morrissey
- Seasons of the Heart (TV, 1994) as Alfred McGuinness
- Cyborg 3: The Recycler (1994) as Lord Talon
- Milk Money (1994) as Waltzer
- Star Trek Generations (1994) as Dr. Tolian Soran
- Exquisite Tenderness (1995) as Dr. Stein
- Dangerous Indescretion (1995) as Roger Everett
- Tank Girl (1995) as Kesslee
- Fist of the North Star (1995) as Ryuken
- Kids of the Round Table (1995) as Merlin
- Sharks of the Red Triangle (1995) as Narrator
- Fatal Pursuit (1995) as Bechtel
- The Great War and the Shaping of the 20th Century (TV) (1996) as Czar Nicholas II / Charles Stockwell / Stephen Graham (voice)
- Our Friends in the North (TV, 1996) as Benny Barratt
- The Little Riders (TV, 1996) as Capt. Kessel
- Yesterday's Target (TV, 1996) as Holden
- Where Truth Lies (1996) as Dr. Vernon Renquist
- Night Train to Venice (1996) as Stranger
- Ringer (1996) as Noel
- Pearl (TV, 1996–97) as Professor Stephen Pynchon
- 2103: The Deadly Wake (1997) as Captain Sean Murdoch
- Asylum (1997) as Sullivan Rane / Doc
- Lexx (episode "Giga Shadow") (TV, 1997) as Yottskry
- Hugo Pool (1997) as Henry
- Mr. Magoo (1997) as Austin Cloquet
- Fantasy Island (TV, 1998–99) as Mr. Roarke
- The Fairy King of Ar (1998) as Ian
- The First 9½ Weeks (1998) as Francois Dubois
- The Gardener (Also known as Garden of Evil and as Silent Screams, 1998) as Ben Carter
- Southern Cross (1999) as Felipe Solano
- Love Lies Bleeding (1999) as Malcolm Mead
- Y2K (Also known as Terminal Countdown, 1999) as General Seward
- My Life So Far (1999) as Uncle Morris MacIntosh
- The David Cassidy Story (TV, 2000) as Jack Cassidy
- St. Patrick: The Irish Legend (TV, 2000) as Quentin
- Gangster No. 1 (2000) as Gangster 55
- Island of the Dead (2000)
- Stanley Kubrick: A Life in Pictures (2001) as Himself
- Princess of Thieves (TV, 2001) as Sheriff of Nottingham
- Just Visiting (2001) as Wizard
- The Void (2001) as Dr. Thomas Abernathy
- Firestarter: Rekindled (TV, 2002) as John Rainbird
- Shadow Realm (TV, 2002) as Martin Hudson
- Between Strangers (2002) as Alan Baxter
- I Spy (2002) as Gundars
- The Barber (Also known as Le Barbier, 2002) as Dexter Miles
- I'll Sleep When I'm Dead (2003) as Boad
- Tempo (2003) as Walter Shrenger
- Inhabited (2003) as Dr. Werner
- The Company (2003) as Alberto Antonelli
- Red Roses and Petrol (2003) as Enda Doyle
- Pact with the Devil (2004) as Henry
- Hidalgo (2004) as Major Davenport (uncredited)
- Evilenko (2004) as Andrej Romanovic Evilenko
- Bobby Jones: A Stroke of Genius (2004) as O.B. Keeler
- Tempesta (2004) as Paul Valenzin
- In Good Company (2004) as Teddy K - Globecom CEO (uncredited)
- Entourage (TV, 2005–2011) as Terrance McQuewick
- Rag Tale (2005) as Chairman - Global Media Inc, Richard (The Chief) Morton
- Mirror Wars: Reflection One (2005) as Murdock
- Monk (TV, 2006) as Julian Hodge
- Bye Bye Benjamin (Short) (2006) as Mr. Coleman
- Law & Order: Criminal Intent (TV, 2006) as Jonas Slaughter
- The Curse of King Tut's Tomb (TV, 2006) as Nathan Cairns
- Cut Off (2006) as James Burton
- Heroes (TV, 2007–08) as Daniel Linderman
- The List (2007) as Desmond Larochette
- Exitz (2007) as Percy
- Never Apologize (2007) as Himself
- Halloween (2007) as Dr. Samuel Loomis
- War and Peace (TV, 2007) as Prince Bolkonsky
- Doomsday (2008) as Kane
- Coco Chanel (TV, 2008) as Marc Bouchier
- The Evening Journey (2008) as Captain Henry
- Blue Gold: World Water Wars (2008) as Narrator
- The Secret Adventures of Mr. Grant (2008) as Subject/Doctor (uncredited)
- Halloween II (2009) as Dr. Samuel Loomis
- Suck (2009) as Eddie Van Helsing
- Snuff (Music video) by Slipknot (2009)
- The Book of Eli (2010) as Lombardi (uncredited)
- Barry Munday (2010) as Mr. Farley
- Easy A (2010) as Principal Gibbons
- Pound of Flesh (2010) as Professor Noah Melville
- Golf in the Kingdom (2010) as Dr. Julian Lange
- Santiago Files (2010) as Narrator
- CSI: Miami (TV series, 2010–2012) as Darren Vogel
- The Mentalist (TV series, 2010–2013) as Bret Stiles
- Franklin & Bash (TV series, 2011–2014) as Stanton Infeld
- L.A., I Hate You (2011) as Harold Weintraub
- The Artist (2011) as The Butler
- The Unleashed (2011) as Narrator
- Suing the Devil (2011) as Satan
- Psych (2011) as Ambassador Fanshaw
- Excision (2012) as Mr. Cooper
- Antiviral (2012) as Dr. Abendroth
- A Green Story (2012) as Barton
- Vamps (2012) as Vlad Tepish
- Silent Hill: Revelation 3D (2012) as Leonard
- Home Alone: The Holiday Heist (2012) as Sinclair
- Silent Night (2012) as Sheriff Cooper
- The Philadelphia Experiment (2012) as Morton Salinger
- Richard the Lionheart (2013) as King Henry II
- Sanitarium (2013) as Dr. Stenson
- Community (TV series, 2013) as Professor Cornwallis
- The Employer (2013) as The Employer
- First Platoon (2013) as Rex Necro
- Zombex (2013) as Dr. Soulis
- Tbilisi, I Love You (2014) as Mr. M
- Mischief Night (2014) as Mr. Smiles
- Shock Value (2014) as Edmund Dean Huntley
- Free Fall (2014) as Thaddeus Gault
- Some Kind of Beautiful (2014) as Gordon
- Mozart in the Jungle (2014–2018) as Thomas Pembridge
- Bereave (2015) as Garvey
- Lady Psycho Killer (2015) as Gerald Portersen
- Dusha shpiona (2015) as Henry
- Kids vs Monsters (2015) as Boss Monster
- Oceanus: Act One (2015) as Triton (Ship's Computer)
- The Black Hole (2016) as Mr. Simms
- Yamasong: March of the Hollows (2016) as Lord Geer
- 31 (2016) as Father Murder
- Mississippi Murder (2017) as McGowan
- Death Race 2050 (2017) as Chairman
- Walk of Fame (2017) as Evan Polus
- Grow House (2017) as Dr. Doobie
- American Satan (2017) as Mr. Capricorn
- Dreams I Never Had (2017) as Judge Messner
- Legacy of Fire (2018) as Richard Strauss[1]
- Oceanus: Odyssey One (2018) as Dorion Xanthis
- Fair and Balanced (TBA) as Rupert Murdoch
