Actor

1. The Last Unicorn (2004) (voice) .... Captain Cully and voice of the Skull
2. Command & Conquer: Renegade (2002) (VG) (voice) .... Doctor Moebius
3. New Legends (2002) (VG) (voice) .... Topo, Kang
4. Blood Omen II: Legacy of Kain (2002) (VG) (voice) .... Janos Audron, The Beast
5. Woodrow Wilson and the Birth of the American Century (2002) .... Woodrow Wilson
6. The Legend of Tarzan (2001) TV Series (voice) .... Renard Dumont

... aka "Disney's the Legend of Tarzan"
7. House of Mouse (2001) TV Series (voice) .... Chef Louie
8. Legacy of Kain: Soul Reaver II (2000) (VG) .... Janos Audron
9. We All Fall Down (2000) .... Tim
10. Joseph: King of Dreams (2000) (V) (voice) .... Butler
11. The Little Mermaid II: Return to the Sea (2000) (V) (voice) .... Chef Louis
12. The Patriot (2000) .... Reverend Oliver
13. Geppetto (2000) .... Professor Bounragazzo
14. An American Tail 3: The Treasure of Manhattan Island (2000) (V) (voice) .... Dithering
15. Sally Hemings: An American Scandal (2000) (TV) .... James Callender
16. Xyber 9: New Dawn (1999) TV Series (voice) .... Xyber 9
17. Star Trek: Deep Space Nine - The Fallen (1999) (VG) (voice) .... Constable Odo
18. Star Trek: Deep Space Nine Companion (1999) (VG) (archive footage) .... Constable Odo
19. Gabriel Knight: Blood of the Sacred, Blood of the Damned (1999) (VG) (voice) .... Taxi Driver/Bigout
20. Inspector Gadget (1999) .... Artemus Bradford
21. Snide and Prejudice (1998) .... Dr. Sam Cohen
22. Los Locos (1997) .... Presidente

... aka Los Locos: Posse Rides Again (1997)
23. Cats Don't Dance (1997) (voice) .... Flanigan
24. The Savage Dragon (1996) TV Series (voice) .... Additional Voices
25. The Great War and the Shaping of the 20th Century (1996) (mini) TV Series (voice) .... Jean Jaurès/Kemal Atatürk
26. Bruno the Kid (1996) TV Series (voice) .... Leonard DaLinguini
27. Batman Forever (1995) .... Dr. Burton
28. Edgar Allan Poe: Terror of the Soul (1995) (TV) .... Fortunato (segment "The Cask of Amontillado")
29. Marsupilami (1994) TV Series
30. Aladdin (1993/I) TV Series (voice) .... Additional Voices

... aka "Disney's Aladdin" (1993)
31. Star Trek: Deep Space Nine - Behind the Scenes (1993) (TV) .... Himself
32. The Ballad of Little Jo (1993) .... Streight Hollander
33. Star Trek: Deep Space Nine (1993) TV Series .... Odo
34. Star Trek: Deep Space Nine - Emissary (1993) (TV) .... Constable Odo
35. Sidney Sheldon's The Sands of Time (1992) (TV)
36. Wild Card (1992) (TV) .... Jake Spence
37. Little Nemo: Adventures in Slumberland (1992) (voice) .... Profesor Genius/The Nightmare
38. Ned Blessing: The True Story of My Life (1992) (TV) .... Marquis

... aka Lone Justice (1994) (TV)
... aka Ned Blessing (1992) (TV)
39. The Player (1992) .... Himself
40. Mighty Max (1991) TV Series (voice) .... Arachnoid/Dr. Stanley Kirby/Nadja
41. Pirates of Darkwater (1991) TV Series (voice)

... aka "Dark Water" (1991) (USA)
42. The Lost Language of Cranes (1991) (TV) .... Geoffrey Lane
43. Star Trek VI: The Undiscovered Country (1991) (uncredited) (scenes deleted).... Colonel West
44. Ashenden (1991) (mini) TV Series
45. Absolute Strangers (1991) (TV) .... Quinn
46. Billy the Kid (1989) (TV)

... aka Gore Vidal's Billy the Kid
47. The Feud (1989) .... Reverton
48. A Connecticut Yankee in King Arthur's Court (1989) (TV) .... Merlin
49. The Little Mermaid (1989) (voice) .... Louis
50. My Best Friend Is a Vampire (1988) .... Modoc

... aka I Was a Teenage Vampire
51. Scooby-Doo and the Ghoul School (1988) (TV) (voice) .... Baxter
52. Police Academy 5: Assignment: Miami Beach (1988) .... Tony
53. Longarm (1988) (TV)

... aka Showdown in Silver City
54. Walker (1987) .... Major Siegfried Hennington
55. 3:15 (1986) .... Principal Horner

... aka 3:15 the Moment of Truth
56. A Smoky Mountain Christmas (1986) (TV)
57. The Christmas Star (1986) (TV) .... Sumner
58. Wildfire (1986) TV Series (voice) .... Alvinar
59. Johnny Quest (1986) TV Series
60. The Super Powers Team: Galactic Guardians (1985) TV Series (voice) .... DeSaad
61. The Snorks (1984) TV Series (voice) .... Dr. Strangesnork/Additional Voices
62. Challenge of the GoBots (1984) TV Series .... Evil Scientist
63. Super Friends: The Legendary Super Powers Show (1984) TV Series .... DeSaad
64. Reilly: The Ace of Spies (1983) (mini) TV Series
65. Sleeping Beauty (1983) (TV) .... King Boris
66. Teenage Tease (1983)
67. The Last Unicorn (1982) (voice) .... Talking Skull
68. The Kid from Nowhere (1982) (TV) .... Howard
69. The Smurfs (1981) TV Series (voice)

... aka Smurfs' Adventures
70. More Wild Wild West (1980) (TV) .... Colonel Sir David Edney
71. Where the Buffalo Roam (1980) .... Harris
72. Benson (1979) TV Series .... Clayton Endicott III (1980-1986)
73. Once Upon a Midnight Scary (1979) .... Ichabod Crane
74. The Wild Wild West Revisited (1979) (TV) .... Captain Sir David Edney
75. Kate Loves a Mystery (1979) (TV) .... Monsieur Gerard

... aka Mrs. Columbo: Word Games (1979) (TV)
76. Eyes of Laura Mars (1978) .... Donald Phelps
77. The Dark Secret of Harvest Home (1978) (TV) .... Jack Stump
78. The Rhinemann Exchange (1977) (mini) TV Series .... Dr. Eugene Lyons
79. King Kong (1976) .... Bagley
80. The Big Bus (1976) .... Father Kudos
81. Panache (1976) (TV) .... Panache
82. The Hindenburg (1975) .... Major Napier
83. Ellery Queen (1975) TV Series

... aka The Adventures of Ellery Queen
84. King Lear (1974) (V) .... Edgar
85. Incident at Vichy (1973) (TV) .... Monceau, An Actor
86. Shirts/Skins (1973) (TV) .... Sidney Krebs
87. Images (1972) .... Hugh
88. Pete 'n' Tillie (1972) .... Jimmy Twitchell
89. McCabe & Mrs. Miller (1971) .... Sheehan
90. The Birdmen (1971) (TV) .... Halden Brevik/Olav Volda

... aka Escape of the Birdmen
91. Once Upon a Dead Man (1971) (TV) .... Andre Stryker
92. Brewster McCloud (1970) .... The Teacher
93. MASH (1970) .... Father John Patrick "Dago Red" Mulcahy

... aka M*A*S*H
94. Petulia (1968) .... Salesman
95. Lilith (1964)
96. The Jetsons (1962) TV Series (voice) .... Additional Voices

Director

1. Star Trek: Deep Space Nine (1993) TV Series (episodios 3x14 "Prophet Motive", 3x23 "Family business", 4x02 "Hippocratic Oath", 4.23 "The Quickening", 5x07 "He Who Is Without Sin", 5x20 "Ferengi Love Songs", 6x11 "Waltz", 7x19 "Strange Bedfellows")
2. Marblehead Manor (1987) TV Series (episodes "The Fondle Workout" and "Gorilla My Dreams")

Otros

1. The Little Mermaid (1989) (singer: "Les Poissons")

Apariciones especiales

1. Enterprise (2001) playing "Ezral" in episode: "Oasis" (episode # 1.20) 4/3/2002
2. The Practice (1997) playing "Judge F. Mantz" in episode: "Pro Se" (episode # 6.13) 2/10/2002
3. Judging Amy (1999) playing "Judge Jackson Keeler" in episode: "Who Shot Dick ?" (episode # 3.12) 1/8/2002
4. Judging Amy (1999) playing "Judge Jackson Keeler" in episode: "Crime & Puzzlement" (episode # 3.11) 12/18/2001
5. Judging Amy (1999) playing "Judge Jackson Keeler" in episode: "Beating The Bounds" (episode # 3.10) 12/11/2001
6. Justice League (2001) playing "Kanjar-Ro/Ganthet the Guardian"(voice) in episode: "In Blackest Night (pt. 2)" (episode # 1.5) 11/26/2001
7. Justice League (2001) playing "Kanjar-Ro"(voice) in episode: "In Blackest Night (pt. 1)" (episode # 1.4) 11/19/2001
8. Judging Amy (1999) playing "Judge Jackson Keeler" in episode: "Look Closer" (episode # 3.5) 10/23/2001
9. The Legend of Tarzan (2001) (voice) in episode: "Tarzan and the Mysterious Visitor" (episode # 1.35) 10/12/2001
10. The Legend of Tarzan (2001) (voice) in episode: "Tarzan and the Gauntlet of Vengeance" (episode # 1.34) 10/11/2001
11. The Legend of Tarzan (2001) (voice) in episode: "Tarzan and the Caged Fury" (episode # 1.33) 10/10/2001
12. Frasier (1993) playing "Dr. William Tewksbury" in episode: "The Wizard and Roz" (episode # 8.20) 5/8/2001
13. Nash Bridges (1996) playing "Hagen Bridges" in episode: "The Partner" (episode # 6.16) 3/9/2001
14. Frasier (1993) playing "Professor William Tewksbury" in episode: "Frasier's Edge" (episode # 8.9) 1/9/2001
15. The Wild Thornberrys (1998) playing "Merrick Dash"(voice) in episode: "Happy Old Year" (episode # 3.12) 12/27/2000
16. The Practice (1997) playing "Judge F. Mantz" in episode: "We Hold These Truths..." (episode # 5.5) 11/5/2000
17. The Secret Adventures of Jules Verne (1999) playing "Cavois" in episode: "The Cardinal's Revenge" (episode # 1.5) 7/16/2000
18. The Secret Adventures of Jules Verne (1999) playing "Cavois" in episode: "The Cardinal's Design" (episode # 1.4) 7/9/2000
19. Stargate SG-1 (1997) playing "Alar" in episode: "The Other Side" (episode # 4.2) 7/7/2000
20. The West Wing (1999) playing "Press conference extra" (uncredited) in episod
21. Chicago Hope (1994) playing "Dr. Walter Kerry" in episode: "Oh What a Piece of Work Is Man" (episode # 6.3) 10/7/1999
22. Poltergeist: The Legacy (1996) playing "Milo Javits" in episode: "Wishful Thinking" (episode # 4.10) 6/18/1999
23. The Outer Limits (1995) playing "Dlaven" in episode: "Promised Land" (episode # 4.21) 8/21/1998
24. Poltergeist: The Legacy (1996) playing "Milo Javits" in episode: "Irish Jug" (episode # 3.11) 4/17/1998
25. Tracey Takes On... (1996) playing "William Catesby-Jones" in episode: "Culture" (episode # 3.9) 3/1/1998
26. Star Trek: Deep Space Nine (1993) playing "Douglas Pabst" in episode: "Far Beyond the Stars" (episode # 6.5) 2/7/1998
27. Extreme Ghostbusters (1997) playing "college professor" (voice) in episode: "Fallout" (episode # 1.27) 11/12/1997
28. Captain Simian & The Space Monkeys (1996) playing "Gardener Allen Gladioluses"(voice) in episode: "Escape From the Planet of the Apes" (episode # 1.21) 5/3/1997
29. The Burning Zone (1996) playing "Dr. Dickettes" in episode: "St. Michael's Nightmare" 9/17/1996
30. ER (1994) playing "Elliot" in episode: "Into That Good Night" (episode # 1.4) 10/13/1994
31. Aladdin (1993/I) playing "Nefir Hasenouf" (voice)
32. Matlock (1986) playing "Doug" in episode: "The Play" (episode # 8.1) 1993
33. Batman: The Animated Series (1992) playing "Dr. March" in episode: "Terror in the Sky" (episode # 1.37) 11/12/1992
34. Batman: The Animated Series (1992) playing "Dr. March" in episode: "On Leather Wings" (episode # 1.2) 9/6/1992
35. Matlock (1986) playing "Leo Brodsky" in episode: "The Assassination" (episode # 6.17) 5/8/1992
36. Eerie, Indiana (1991) playing "The Donald" in episode: "Zombies in P.J.s" (episode # 1.17) 4/22/1992
37. Rugrats (1991) playing "Jonathan"
38. L.A. Law (1986) playing "Kevin Richardson" in episode: "The Son Also Rises" (episode # 3.2) 11/10/1988
39. Murder, She Wrote (1984) playing "Homicide Capt Walker Thorn" in episode: "Mourning Among the Wisterias" (episode # 4.15) 2/14/1988
40. Murder, She Wrote (1984) playing "Prof. Harry Papasian" in episode: "Murder In A Minor Key" (episode # 3.14) 2/8/1987
41. Tenspeed and Brown Shoe (1980) in episode: "Untitled" (episode # 1.12) 1980
42. Charlie's Angels (1976) playing "Freddie Fortune" in episode: "Angels on Skates" (episode # 4.10) 11/21/1979
43. Wonder Woman (1976) in episode: "Spaced Out" (episode # 3.13) 1/26/1979
44. Hart to Hart (1979) playing "Donald Springfield"
45. Starsky and Hutch (1975) playing "Baron" in episode: "Dandruff" (episode # 4.8) 11/14/1978
46. The Rockford Files (1974) in episode: "With the French Heel Back, Can the Nehru Jacket Be Far Behind?" (episode # 5.13) 1978
47. The Bionic Woman (1976) in episode: "The Dijon Caper" (episode # 2.21) 1977
48. Rhoda (1974) playing "Dr. Fox"1977
49. The Man from Atlantis (1977) playing "Havergal" in episode: "Crystal Water, Sudden Death" 1977
50. Charlie's Angels (1976) in episode: "The Seance" (episode # 1.11) 12/15/1976
51. Baa Baa Black Sheep (1976) in episode: "Devil in the Shoot" 1976
52. Baa Baa Black Sheep (1976) playing "Australian officer" in episode: "One Small War"
53. Delvecchio (1976)
54. Harry O (1974) playing "Rabbit" in episode: "Anatomy of a Frame" (episode # 2.1) 9/11/1975
55. The Bob Newhart Show (1972) playing "Dr. Alan Durocher" in episode: "Shrinks across the Sea" 1975
56. Ellery Queen (1975) playing "Marcel Fourchet" in episode: "The Adventure of Colonel Niven's Memoirs" (episode # 1.7) 10/23/1975
57. The Jeffersons (1975) playing "Inspector Keller" in episode: "Harry and Daphne" (episode # 2.4) 10/4/1975
58. Harry O (1974) playing "Rabbit" in episode: "Anatomy of a Frame" (episode # 2.1) 9/11/1975
59. Love, American Style (1969) in episode: "The Spaced-Out Chick" 10/13/1972
60. Night Gallery (1970) playing "William Sharsted" in episode: "Camera Obscura" (episode # 2.36) 12/8/1971