Credits

• 2022 · Desert Shadows as Professor Charles M. Ridley
• 2021 · American Traitor: The Trial of Axis Sally as John Kelly
• 2021 · Walker as Bonham Walker
• 2020 · Helstrom as Papa
• 2019 · Polaroid as Sheriff Thomas Pembroke
• 2018 · The Rookie as Rex
• 2017 · Transformers: The Last Knight as TRF Group Leader
• 2015 · Supergirl as Rama Khan
• 2015 · The Girl in the Photographs as Sheriff Porter
• 2012 · Dallas as Harris Ryland
• 2012 · The Finder as Eddie Ross
• 2011 · Mega Cyclone as Gunter MacGregor
• 2011 · American Horror Story as Art
• 2011 · Against the Wall as Randall
• 2010 · Woodshop as Miller
• 2009 · Stargate Atlantis: Fans' Choice as Steven Caldwell
• 2009 · Castle as Hans Brauer
• 2009 · Xtra Credit as John Weller
• 2008 · Leverage as Colin Saunders
• 2008 · Breaking the Magician's Code: Magic's Biggest Secrets Finally Revealed as Narrator (voice)
• 2008 · Flash of Genius as Macklin Tyler
• 2008 · Sons of Anarchy as Ernest Darby
• 2008 · The X Files: I Want to Believe as Walter Skinner
• 2008 · In Plain Sight as
• 2008 · Recount as Bill Daley
• 2007 · Reaper as
• 2007 · Man in the Chair as Floyd
• 2006 · Day Break as Detective Spivak
• 2006 · Brothers and Sisters as Browne Carter
• 2005 · Supernatural as Samuel Campbell
• 2005 · Supernatural as Samuel Campbell / Shapeshifter
• 2005 · Grey's Anatomy as Lawrence Jennings
• 2005 · Grey's Anatomy as Larry Jennings
• 2005 · Medium as Dan Burroughs
• 2004 · Boston Legal as U.S. Attorney Mark Freestone
• 2004 · The Mountain as Colin Dowling
• 2004 · The Batman as Commissioner Gordon (voice)
• 2004 · The Batman as Gordon (voice)
• 2004 · Stargate Atlantis as Steven Caldwell
• 2003 · Tarzan as Richard Clayton
• 2003 · NCIS as Wynn Crawford
• 2003 · Nip/Tuck as
• 2003 · First to Die as Warren Jacobi
• 2002 · Birds of Prey as Al Hawke
• 2001 · The Lone Gunmen as Walter Skinner
• 2001 · Conspiracy Theory: Did We Land on the Moon? as Narrator
• 2000 · CSI: Crime Scene Investigation as Happy Harry Desmond
• 2000 · Gun Shy as Dexter Helvenshaw
• 1999 · The West Wing as Senator Dresden
• 1999 · Law & Order: Special Victims Unit as Jack Hammond
• 1999 · Batman Beyond as Dr. Stanton (voice)
• 1998 · That '70s Show as Bull
• 1998 · Legion of Fire: Killer Ants as Police Chief Jeff Croy
• 1998 · The X Files as Assistant Director Walter Skinner
• 1998 · Inside The X-Files as Self
• 1996 · Raven Hawk as Carl Rikker
• 1995 · Vampire in Brooklyn as Tony the Hitman
• 1994 · ER as Terry Waters
• 1994 · Dangerous Touch as Vince
• 1993 · Trouble Shooters: Trapped Beneath the Earth as Thompson
• 1993 · The X-Files as Walter Skinner
• 1993 · The X-Files as Walter Skinner / SS Sturmbannfuehrer
• 1992 · Basic Instinct as Internal Affairs Investigator
• 1991 · Roc as White Officer
• 1991 · Knight Rider 2000 as Thomas J. Watts
• 1991 · Guilty As Charged as Dominique
• 1990 · Night Visions as Captain Keller
• 1989 · Alien Nation as
• 1989 · Shocker as Horace Pinker
• 1988 · Brothers in Arms as Caleb
• 1988 · Return of the Living Dead Part II as Sarge
• 1987 · Three O'Clock High as Duke Herman
• 1987 · 3 On a Match as Bull Tully
• 1987 · Death Wish 4: The Crackdown as Lab Foreman
• 1987 · U.S. Marshals: Waco & Rhinehart as Gate AP
• 1986 · Dalton: Code of Vengeance II as Verbeck
• 1984 · On the Line as Stephens
• 1983 · The A-Team as Paul Winkle
• 1982 · Mongrel as Woody
• 1981 · Falcon Crest as Saunder's Henchman
• 1981 · Falcon Crest as Eddie
• 1978 · Dallas as Morrisey