Acting

2024

(2 episodes) as Granamyr (voice)

2022

(1 episode) as Self

2021		The Center Seat: 55 Years of Star Trek (3 episodes) as Self
2021		DOTA: Dragon's Blood (2 episodes) as Ritterfau (voice)

2020		Star Trek: Lower Decks (1 episode) as Q (voice)
2020		Star Trek: Picard (1 episode) as Q (uncredited) (8 episodes) as Q

2019

(1 episode) as Self

2016

(2 episodes) as Brainiac (voice)

2014		The Librarians (1 episode) as Sesselman
2014		Bronies 2 - More Unexpected Fans of My Little Pony (12 episodes)

2013

(1 episode) as Self

2011

(1 episode)

2010		Young Justice (1 episode) as Mr. Twister / Brom Stikk (voice)
2010		My Little Pony: Friendship Is Magic (221 episodes) as Discord (voice)
2010		Law & Order: LA (1 episode) as Avery Staynor

2008		The Mentalist (1 episode) as Edward Feinberg
2008		Breaking Bad (4 episodes) as Donald Margolis

2007

(2 episodes) as Himself

2006		Torchwood (3 episodes) as Allen Shapiro
2006		Shark (1 episode)
2006		The Unit (1 episode)

2005

(1 episode) as Dr. Dawson

2002

(1 episode) as Brian Gaghan

2001		The Guardian (1 episode)
2001		Crossing Jordan (1 episode) as Medical Examiner Thaxton
2001		Special Unit 2 (1 episode) as King of the Links
2001		The Division (1 episode)

2000		CSI: Crime Scene Investigation (1 episode) as General Robert Lansdale
2000		Andromeda (2 episodes) as Uncle Sid Barry / Sam Profitt

1999		The West Wing (2 episodes) as Al Kiefer
1999		Judging Amy (1 episode) as Dr. Eagan
1999		Family Guy (1 episode) as Pewterschmidt Industries Executive (voice)

1998		Charmed (4 episodes) as Odin
1998		Sports Night (1 episode)

1997		Ally McBeal (1 episode) as Jackson Poile
1997		Stargate SG-1 (5 episodes) as Frank Simmons
1997		The Angry Beavers (1 episode)
1997		Fired Up (2 episodes)
1997		The Practice (1 episode) as Walter Bannish

1996

(26 episodes) as Dr. Benton Quest (voice)

1995		Murder One (1 episode) as Mitchell Garron, Esq.
1995		Legend (13 episodes) as Janos Bartok
1995		The Outer Limits (1 episode) as Donald Finley
1995		Star Trek: Voyager (3 episodes) as Q

1994

(1 episode)

1993

(1 episode) as Q

1992

(2 episodes) as Eagleton (voice)

1988		Mission: Impossible (1 episode)
1988		Trial and Error (8 episodes)

1987

(1 episode) as Self (8 episodes) as Q

1986		L.A. Law (1 episode) as Mark Chelios
1986		Matlock (2 episodes) as Dr. Albert Levinson

1985		MacGyver (1 episode)
1985		The Twilight Zone (1 episode)

1983

(4 episodes) as Alastair MacQueen

1981

(1 episode)

1978		Little Women (2 episodes) as Frank Vaughn
1978		Battlestar Galactica (1 episode) as Officer

1977

(3 episodes) as Ray Chilton

1974

(1 episode) as Sergeant Chapman (2 episodes) as Diver (1 episode) as Medic

1972		Emergency! (1 episode) as Dr. DeRoy
1972		Le Grand Échiquier (1 episode) as Self