Self
The Center Seat: 55 Years of Star Trek (2021)
Teddy Chislington
The Librarians (2014)
Sardath (voice)
Young Justice (2010)
The Keeper (voice)
La spada della verità (2008)
Robert Pryce
Mad Men (2007)
Dexter (2006)
John Caulfield
Criminal Minds (2005)
Father Cullen
C'è sempre il sole a Philadelphia (2005)
Canton Delaware
Doctor Who (2005)
Old Canton Delaware
Merlin (voice)
Justice League (2001)
Clive Alpert
Crossing Jordan (2001)
Town Elder
Una mamma per amica (2000)
Merrill
Streghe (1998)
Lead Jackal (voice)
La famiglia della giungla (1998)
Grave Digger
Poltergeist: The Legacy (1996)
Maj. Viktor Lushov
JAG - Avvocati in divisa (1995)
Qatai
Star Trek: Voyager (1995)
Petros Xanatos (voice)
Gargoyles - Il risveglio degli eroi (1994)
Dum Dum Dugan (voice)
Iron Man (1994)
The Soul Hunter
Babylon 5 (1994)
Warleader G'Sten
Dr. Tom Arneberg
Un detective in corsia (1993)
Lawrence Limburger (voice)
Biker Mice da Marte (1993)
Mr. Drake
Frasier (1993)
The Professor
SeaQuest - Odissea negli abissi (1993)
Gooshie, the Miner
In viaggio nel tempo (1989)
Dr. Ira Graves
Star Trek: The Next Generation (1987)
Blank Reg
Max Headroom (1987)
Quattro donne in carriera (1986)
Dr. Zito
MacGyver (1985)
Gracchus 1 episode, 1985
A.D. - Anno Domini (1985)
Dr. Fredrick Grundberg
La signora in giallo (1984)
Mahaffy
L'ora del mistero (1984)
Bill's Father
The Day of the Triffids (1981)
Specz
Shōgun (1980)
Hospital Gardener
Racconti Del Brivido (1980)
John
Minder (1979)
Gorlois
The Legend of King Arthur (1979)
Mr. Smith
Out (1978)
Raymond Girard
Enemy at the Door (1978)
Malenski
I professionals (1977)
Det. Chief Insp. Morrison
L'ispettore Regan (1975)
Harry Cowper
Play for Today (1970)
In Memory Of