—

1 episode as Mitchell Colfax

2020		50 States of Fright 2 episodes as Frank
2020		Upload 15 episodes as David Choak

2019

2 episodes as Methuselah

2018

10 episodes 1 episode as Cigarette Smoking Man / True Name Carl Gerhard Busch

2014

1 episode as Grandfather

2013

1 episode as Plumberg

2012

10 episodes as Future Alec Sadler

2010		Human Target 1 episode
2010		Caprica 1 episode as Minister Chambers

2008

1 episode as Father Chris

2007

1 episode

2006

1 episode as College Professor

2005		Stargate SG-1 3 episodes as Damaris
2005		Robson Arms 26 episodes
2005		Tilt 1 episode as Father Luke

2002		Smallville 2 episodes as William Tate
2002		Broken Saints 7 episodes as Benjamin Palmer (voice)

2001		Andromeda 1 episode as Professor Logitch
2001		MythQuest 1 episode as Drossos
2001		The Outer Limits 1 episode as Dr. Frank Biemler
2001		First Wave 1 episode as Sagon

1999

3 episodes as CGB Spender

1998

1 episode as SS Oberfuehrer / Smoking Man

1996		The Outer Limits 1 episode as John Wymer
1996		Poltergeist: The Legacy 1 episode as Dr. Bill Nigel

1995		The Outer Limits 1 episode as Ed
1995		Sliders 1 episode as Prof. Myman

1994

1 episode as Cancer Man

1993

37 episodes as Cigarette Smoking Man

1992

1 episode as Doctor

1991		The Commish 2 episodes
1991		MacGyver 1 episode as Judge
1991		21 Jump Street 1 episode as Judge Harrison

1990

2 episodes as Sr. Gedreau

1988		21 Jump Street 1 episode as Mr. Wickenton
1988		Wiseguy 2 episodes

1987		Danger Bay 1 episode as Norris
1987		21 Jump Street 1 episode as Mr. Weidlin
1987		Airwolf 2 episodes as Newman 2 episodes as F.I.R.M. Official

—

… Creator

2000

1 episode … Writer