2021
Star Trek: Prodigy as Odo (voice) (1 episode)
2020
First Cow as Man with Raven
2019
Windows on the World as Maury
2019
Raising Buchanan as President James Buchanan
2018
What We Left Behind: Looking Back at Star Trek: Deep Space Nine as Self
2016
Way Out on a Limb as Self
2016
Certain Women as Albert
2015
This Is Happening as Cal Plotz
2014
The Librarians as Mr. McGuire (1 episode)
2014
Planes: Fire & Rescue as Concierge (voice)
2013
Masters of Sex as Dr. George Papanikolaou (1 episode)
2013
Wander Over Yonder as Maurice (voice) (1 episode)
2013
The Captains Close Up as Self (2 episodes)
2013
The Sixth Gun as Von Allen / Montcrief
2012
1600 Penn as Winslow Hannum (2 episodes)
2012
Ben 10: Omniverse as Azmuth (voice) (1 episode)
2012
Get a Life! as Himself
2011
The Captains as Self
2011
The Looney Tunes Show as Pepé Le Pew (voice) (1 episode)
2010
Young Justice as Mark Desmond (voice) (2 episodes)
2010
Pound Puppies as McLeish (voice) (65 episodes)
2010
BlackBoxTV Presents as Rudy (8 episodes)
2009
The Good Wife as Coroner Claypool (1 episode)
2009
Archer as Cardinal Giancarlo Morelli (voice) (1 episode)
2009
Archer as Mannfred (voice) (2 episodes)
2009
Warehouse 13 as Hugo Miller (4 episodes)
2008
Hornswiggle as Hornswiggle (voice)
2008
Random! Cartoons as Hornswiggle / Apeman #2 (voice) (1 episode)
2008
Dispatches from Nicaragua
2007
Chill Out, Scooby-Doo! as Alphonse LaFleur (voice)
2007
Saving Grace (2 episodes)
2007
Andrew Jackson: Good, Evil & The Presidency as James Parton (voice)
2007
Scooby-Doo: Agence toutou risques, vol. 2 : Le fantôme de la télé as (voice)
2007
Scooby-Doo: Agence toutou risques, vol. 1 : Le voleur de vélo as (voice)
2005
Criminal Minds as Colonel Ron Massey (1 episode)
2005
It's Always Sunny in Philadelphia as Dr. Larry Meyers (1 episode)
2005
Family Guy Presents: Stewie Griffin: The Untold Story as Odo (voice)
2005
Grey's Anatomy as Neil Sheridan (1 episode)
2005
Avatar: The Last Airbender as Gan Jin Leader (voice) (1 episode)
2005
Avatar: The Last Airbender as Mechanist (voice) (1 episode)
2005
Geppetto's Secret as Mr. Sneap
2004
Eulogy as Parson Banke
2004
Boston Legal as Paul Lewiston (60 episodes)
2003
Xiaolin Showdown as Master Fung (voice) (13 episodes)
2003
Trials and Tribble-ations: Uniting Two Legends as Himself
2002
Tarzan & Jane as (voice)
2002
Witness to Hope: The Life of Karol Wojtyla, Pope John Paul II as Narrator (voice)
2002
Woodrow Wilson as voice
2001
Justice League as Desaad / General Steppenwolf / Minion (voice) (1 episode)
2001
Justice League as Galius Zed / Kalanorian (voice) (1 episode)
2001
Justice League as Kanjar-Ro / Galius Zed / Guardian of Oa (voice) (2 episodes)
2001
Star Trek: Enterprise as Ezral (1 episode)
2001
The Legend of Tarzan as Renard Dumont (voice) (12 episodes)
2001
The Princess Diaries as Philippe Renaldi (uncredited)
2001
Burning Down the House as Pierre
2001
Disney's House of Mouse
2000
Joseph: King of Dreams as Butler (voice)
2000
The Patriot as Reverend Oliver
2000
The Secret Adventures of Jules Verne (2 episodes)
2000
Geppetto as Prof Buonragazzo
2000
Sally Hemings: An American Scandal as James Callender (2 episodes)
2000
Sally Hemings: An American Scandal as James Callender
2000
The Little Mermaid II: Return to the Sea as Chef Louis (voice)
2000
Enlisted: The Story of 'M*A*S*H' as Self
1999
Xyber 9: New Dawn as Xyber 9 (voice) (22 episodes)
1999
We All Fall Down as Tim
1999
Judging Amy as Judge Jackson Keeler (4 episodes)
1999
Inspector Gadget as Artemus Bradford
1999
Family Guy as Odo (voice) (1 episode)
1998
The Wild Thornberrys as Merrick Dash (voice) (1 episode)
1998
An American Tail: The Treasure of Manhattan Island as Dithering (voice)
1997
Extreme Ghostbusters (1 episode)
1997
Stargate SG-1 as Alar (1 episode)
1997
Snide and Prejudice as Dr. Sam Cohen
1997
Cats Don't Dance as Flanigan (voice)
1997
The Practice as Judge F. Mantz (2 episodes)
1997
Los Locos as Presidente
1996
The Great War and the Shaping of the 20th Century as Jean Jaures / Mustafa Kemal Ataturk (voice) (1 episode)
1996
The Making of Star Trek Deep Space Nine Trials And Tribble-ations as Self
1996
Richie Rich as Richard Rich, Chef Pierre, Professor Keenbean (13 episodes)
1996
Captain Simian & the Space Monkeys as Gardener / Alien Gladioluses (voice) (1 episode)
1996
Nash Bridges (1 episode)
1995
The Savage Dragon as Horde (voice) (2 episodes)
1995
Star Trek: Deep Space Nine - The Way of the Warrior as Odo
1995
Batman Forever as Dr. Burton
1995
The Outer Limits as Dlavan (1 episode)
1994
Chicago Hope (1 episode)
1994
Aladdin as Nefir Hasenuf (voice) (2 episodes)
1993
Marsupilami as Chef Louie (voice) (39 episodes)
1993
Frasier as William Tewksbury (2 episodes)
1993
The Ballad of Little Jo as Streight Hollander
1993
Star Trek: Deep Space Nine - Emissary as Odo
1993
Star Trek: Deep Space Nine - Behind the Scenes as Himself
1993
Star Trek: Deep Space Nine as Odo (176 episodes)
1992
The Sands of Time as Prime Minister
1992
Raw Toonage as Chef Louie (voice) (2 episodes)
1992
Batman: The Animated Series as Dr. March (voice) (2 episodes)
1992
Wild Card as Jake Spence
1992
Ned Blessing: The True Story Of My Life as Marquis
1992
The Player as René Auberjonois
1992
Lucky Luke as Mr. Edgar Rockbottom / Mendez (1 episode)
1991
Eerie, Indiana as The Donald (1 episode)
1991
Absolute Strangers as Quinn
1990
Tom & Jerry Kids Show as Pierre (voice) (1 episode)
1989
A Connecticut Yankee in King Arthur's Court as Merlin
1989
The Little Mermaid as Louis (voice)
1989
The Feud as Reverton
1989
Doogie Howser, M.D. (1 episode)
1989
Little Nemo: Adventures in Slumberland as Professor Genius (voice)
1988
American Experience as Alexander Hamilton (voice) (1 episode)
1988
American Experience as Woodrow Wilson (voice) (2 episodes)
1988
Police Academy 5: Assignment Miami Beach as Tony
1988
Longarm as Gov. Lew Wallace
1987
Walker as Maj. Siegfried Hennington
1987
My Best Friend Is a Vampire as Modoc
1987
DuckTales as Dr. Nogood (voice) (1 episode)
1986
The Christmas Star as Sumner
1986
A Smoky Mountain Christmas as Ned
1986
L.A. Law as Kevin Richardson (1 episode)
1986
Wildfire (13 episodes)
1986
Matlock (3 episodes)
1986
3:15 the Moment of Truth as Horner
1986
Blacke's Magic (1 episode)
1985
The Super Powers Team: Galactic Guardians (10 episodes)
1984
Challenge of the GoBots (5 episodes)
1984
Murder, She Wrote as Homicide Captain Walker Thorn (1 episode)
1984
Murder, She Wrote as Prof. Harry Papasian (1 episode)
1984
Snorks as Dr. Strangesnork (108 episodes)
1983
Sleeping Beauty as King Boris
1982
The Smurfs Christmas Special as Stranger (voice)
1982
The Last Unicorn as The Skull (voice)
1982
Faerie Tale Theatre as King Boris (1 episode)
1982
Faerie Tale Theatre as King Ulrich (1 episode)
1982
The Tale of the Frog Prince as King Ulrich
1982
The Kid From Nowhere as Howard
1980
More Wild Wild West as Capt. Sir David Edney
1980
Where the Buffalo Roam as Harris
1980
Beyond Westworld as Power (1 episode)
1980
Tenspeed and Brown Shoe (1 episode)
1979
Once Upon a Midnight Scary as Ichabod Crane
1979
Hart to Hart as Donald Springfield (1 episode)
1979
Benson as Clayton Endicott III (134 episodes)
1979
The Wild Wild West Revisited as Capt. Sir David Edney
1979
Stockard Channing: In Just Friends (1 episode)
1979
Mrs. Columbo (2 episodes)
1978
Eyes of Laura Mars as Donald Phelps
1978
The Dark Secret of Harvest Home as Jack Stump (2 episodes)
1977
Man from Atlantis as Havergal (1 episode)
1977
The Rhinemann Exchange as Dr. Eugene Lyons (3 episodes)
1976
Charlie's Angels as Freddie Fortune (1 episode)
1976
Charlie's Angels as Terrence (1 episode)
1976
Baa Baa Black Sheep as Matthew Hooper (1 episode)
1976
King Kong as Roy Bagley
1976
The Big Bus as Father Kudos
1976
The Bionic Woman (1 episode)
1975
The Hindenburg as Major Napier
1975
Upcoming Season as Roberts
1975
Wonder Woman as Kimball (1 episode)
1975
Ellery Queen (1 episode)
1975
Starsky & Hutch (1 episode)
1975
The Jeffersons (1 episode)
1974
The Lives of Benjamin Franklin (4 episodes)
1974
The Rockford Files as Masters (1 episode)
1974
Harry O as Rabbit (1 episode) (22 episodes)
1973
Incident at Vichy as Monceau, An Actor
1973
The Birdmen as Halden Brevik / Olav Volda
1973
Shirts/Skins as Sidney Krebs
1973
Super Friends as Desaad (voice) (8 episodes)
1972
Pete 'n' Tillie as Jimmy Twitchell
1972
The Rookies (1 episode)
1971
Once Upon a Dead Man as Andre Stryker
1971
McCabe & Mrs. Miller as Sheehan
1971
Great Performances as Edgar (1 episode)
1970
Night Gallery (1 episode)
1970
Brewster McCloud as The Lecturer
1970
M*A*S*H as Father Mulcahy
1968
The Mod Squad (1 episode)
1968
Petulia as Fred Six (uncredited)
1964
Lilith as Howie (uncredited)
1962
The Jetsons as (voice) (1 episode)
1956
Tony Awards as Self - Nominee (1 episode)