2014
Swan Song: The Story of Billy Wilder's Fedora as Himself
2014
Sleeping Beauty as The Narrator
2012
Flatland²: Sphereland as Spherius (voice)
2012
Earth Songs as Narrator
2011
Glad Christmas Tidings Featuring David Archuleta as Self
2011
The Mill and the Cross as Nicolaes Jonghelinck
2010
The Justice of Wolves as Mika - Adult
2010
Tom and Jerry Meet Sherlock Holmes as Sherlock Holmes (voice)
2009
A Tale of Two Cities: In Concert as Narrator
2009
Transformers: Revenge of the Fallen as Prime #1 (voice)
2008
Rosamunde Pilcher's Four Seasons as Stephen Combe (4 episodes)
2008
Star Wars: The Clone Wars as Dr. Nuvo Vindi (voice) (2 episodes)
2008
Mary Pickford: The Muse of the Movies as Self - Narrator
2008
Marty Feldman: Six Degrees of Separation as Self
2007
Flatland as Spherius (voice)
2006
Legends as Self (1 episode)
2006
Legends as Self (uncredited) (1 episode)
2006
Cuba: A Lifetime of Passion as Narrator
2005
How I Met Your Mother as Jefferson Van Smoot (1 episode)
2005
The Hobart Shakespeareans as Himself
2005
Crusader as McGovern
2005
William Powell: A True Gentleman as Narrator
2005
Frederick Forsyth's Icon as Sir Nigel Irvine (3 episodes)
2005
Icon as Sir Nigel Irvine
2004
Moscow Heat as Roger Chambers
2004
Freedom from Despair as Voice Over
2004
Making 'Murder on the Orient-Express' as Self
2004
Justice League Unlimited as Ares / Mr. Sera (voice) (1 episode)
2004
The Lady Musketeer as D'Artagnan (2 episodes)
2002
Winnie the Pooh: A Very Merry Pooh Year as Narrator (voice)
2002
Presidio Med (1 episode)
2002
Austin Powers in Goldmember as Basil Exposition
2001
Law & Order: Criminal Intent as Bernard Fremont (1 episode)
2001
In Search of Peace as Chaim Herzog (voice)
2001
Megiddo: The Omega Code 2 as Stone Alexander
2000
The Land Before Time VII: The Stone of Cold Fire as Pterano (voice)
2000
Founding Fathers as Alexander Hamilton (voice) / Thomas Paine (voice) (4 episodes)
2000
One Hell of a Guy as The Devil
2000
Curb Your Enthusiasm as Michael York (4 episodes)
2000
Gilmore Girls as Asher Fleming (4 episodes)
1999
The Haunting of Hell House as Professor Ambrose
1999
Madonna: The Video Collection 93:99 as Basil Exposition (segment "Beautiful Stranger")
1999
The Omega Code as Alexander Stone
1999
Puss in Boots as Puss In Boots (voice)
1999
Austin Powers: The Spy Who Shagged Me as Basil Exposition
1999
Family Guy as Documentary Speaker (voice) (1 episode)
1999
Magic and Beyond as Host (26 episodes)
1998
A Knight in Camelot as King Arthur
1998
Wrongfully Accused as Hibbing Goodhue
1998
Perfect Little Angels as Calvin Lawrence
1998
Merchants of Venus as Alex Jakoff
1998
Babylon 5: In the Beginning as David 'Arthur' McIntyre (arcive footage, uncredited)
1998
Lovers and Liars as Dick
1997
A Christmas Carol as Bob Cratchit (voice)
1997
The Ripper as Sir Charles Warren
1997
The Long Way Home as (voice)
1997
Un coup de baguette magique as Ilya
1997
True Women as Lewis Lawshe (2 episodes)
1997
Austin Powers: International Man of Mystery as Basil Exposition
1997
Austin Powers' Electric Psychedelic Pussycat Swingers Club as The Swingers Club
1997
Goodbye America as Senator Bladon
1997
Dark Planet as Winter
1996
The Great War and the Shaping of the 20th Century as Robert Graves / Harold Owen (voice) (1 episode)
1996
The Ring as Walmar von Gotthard
1996
The Ring as Walmar von Gotthard (2 episodes)
1996
Superman: The Animated Series as Kanto (voice) (2 episodes)
1996
Rosamunde Pilcher: September as Edmund
1996
September as Edmund (2 episodes)
1996
Basketball Mozart as Narrator (voice)
1995
Virgin Mary as Milan Vukovic
1995
The Naked Truth as Leland Banks (1 episode)
1995
Not of This Earth as Paul Johnson
1995
Shadow of a Kiss as Albert
1995
A Young Connecticut Yankee in King Arthur's Court as Merlin
1994
The Magic School Bus as (voice) (1 episode)
1994
Fall from Grace as Hans-Dieter Stromelburg
1994
The Magic Flute as King Sarastro
1994
TekWar: TekLab as Richard Stewart
1994
Babylon 5 as David 'Arthur' McIntyre (2 episodes)
1993
David Copperfield as Edward Murdstone (voice)
1993
seaQuest DSV as President Alexander Bourne (3 episodes)
1993
The Magic Paintbrush as The King (voice)
1993
Wide Sargasso Sea as Paul Mason
1992
Batman: The Animated Series as Dr. Montague Kane (voice) (1 episode)
1992
Batman: The Animated Series as Vertigo (voice) (1 episode)
1992
Rochade as Paul Grumbach
1992
Duel of Hearts as Gervaise Warlingham
1991
Eline Vere as Lawrence St. Clare
1991
The Wanderer as Saxon Warrior
1990
Night of the Fox as Field Marshal Erwin Rommel / Caporal Berger
1990
The Lady and the Highwayman as King Charles II
1990
Come See the Paradise as Dance Hall Band
1989
The Simpsons as Clayton (voice) (1 episode)
1989
The Simpsons as Dr. Lionel Budgie (voice) (3 episodes)
1989
The Simpsons as Mason Fairbanks (voice) (1 episode)
1989
The Simpsons as Nigel (voice) (1 episode)
1989
Judith Krantz's Till We Meet Again (2 episodes)
1989
Golden Book Video - Beauty and the Beast as Beast (voice)
1989
The Heat of the Day as Robert
1989
The Return of the Musketeers as D'Artagnan
1988
The Four Minute Mile as Franz Stampfl
1988
Midnight Cop as Karstens
1988
Phantom of Death as Robert Dominici
1988
The Secret of the Sahara as Desmond Jordan (4 episodes)
1987
Lethal Obsession as Dr. Proper
1987
The Far Country as Carl Zlinter (2 episodes)
1986
The Dawn as John Dawson
1986
Ponce de Leon as Ponce de Leon
1986
Sword of Gideon as Robert
1986
Dark Mansions as Jason Drake
1986
Are You My Mother? as Chet Gordon
1985
Tall Tales & Legends as Ponce de Leon (1 episode)
1985
Space as Dieter Kolff (5 episodes)
1985
Au nom de tous les miens as Martin Gray (8 episodes)
1984
The Bengal Lancers! as Captain Walberton
1984
Success Is the Best Revenge as Alex Rodak
1984
The Master of Ballantrae as James Durie
1983
The Weather in the Streets as Rollo Spencer
1983
For Those I Loved as Martin's Father / Martin Gray (age 40)
1983
Vendredi ou la vie sauvage
1983
The Phantom of the Opera as Michael Hartnell
1982
Twilight Theatre as Self - Host
1981
The White Lions as Chris McBride
1981
Beauty and the Beast as The Beast (voice)
1981
Wetten, dass..? as Self (1 episode)
1980
Final Assignment as Lyosha Petrov
1979
Knots Landing as Charles Scott (8 episodes)
1979
Red, White, and Zero as Acrobat
1979
A Man Called Intrepid as Evan Michaelian (3 episodes)
1979
The Riddle of the Sands as Charles Carruthers
1979
A Man Called Intrepid as Evan Michaelian
1978
Formula 1 - Speed fever as Self
1977
True Patriot as Dietrich Bonhoeffer
1977
Weekend Special as King Sarastro (voice) (2 episodes)
1977
The Island of Dr. Moreau as Andrew Braddock
1977
The Last Remake of Beau Geste as Beau Geste
1977
Jesus of Nazareth as John the Baptist (4 episodes)
1977
Jesus Of Nazareth as John the Baptist
1976
Seven Nights in Japan as Prince George
1976
Logan's Run as Logan
1976
A Look Into the 23rd Century as Self
1975
Conduct Unbecoming as Tenente Arthur Drake
1974
Murder on the Orient Express as Count Andrenyi
1974
The Four Musketeers as D'Artagnan
1974
Great Expectations as Pip
1973
The Three Musketeers as D’Artagnan
1973
England Made Me as Anthony Farrant
1973
Lost Horizon as George Conway
1973
Tennessee Williams' South
1972
The Recreation of an Era
1971
Touch and Go as Basil
1971
Zeppelin as Geoffrey Richter-Douglas
1970
Something For Everyone as Konrad Ludwig
1969
Alfred the Great as Guthrum
1969
The Guru as Tom Pickle
1968
The Strange Affair as Peter Strange
1968
Red and Blue as Acrobat
1968
Romeo and Juliet as Tybalt
1967
Smashing Time as Tom Wabe
1967
The Taming of the Shrew as Lucentio
1967
Confessions of Loving Couples
1967
The Forsyte Saga as Jolyon 'Jolly' Forsyte (3 episodes)
1965
The Wild Wild West (1 episode)
1963
Arrest and Trial (1 episode)
1956
Tony Awards as Self - Performer (1 episode)
1951
Hallmark Hall of Fame as James Durie, Henry's older brother (1 episode)
1944
Golden Globe Awards as Self - Host (1 episode)