Mark Sheppard
Mark Andreas Sheppard (born 30 May 1964) is a British actor and musician. He is often credited as Mark A. Sheppard. Sheppard is known for playing the demon/King of Hell Crowley on Supernatural and for his recurring roles as lawyer Romo Lampkin on the Battlestar Galactica reboot, Interpol investigator James Sterling on Leverage, and small-time crime lord Badger on Joss Whedon's Firefly. Description above from the Wikipedia article Mark Sheppard, licensed under CC-BY-SA, full list of contributors on Wikipedia.
Movies
Sons of Liberty
2013
Mysterious Island
2010
Unstoppable
2004
Deep Shock
2003
New Alcatraz
2001
Lost Voyage
2001
Lady in the Box
2001
Farewell, My Love
2000
Out of the Cold
1999
TV Shows
Secret Level
2024
Walker Independence
2022
Doom Patrol
2019
White Collar
2009
Warehouse 13
2009
The Middleman
2008
In Plain Sight
2008
Bionic Woman
2007
Burn Notice
2007
Supernatural
2005
Doctor Who
2005
Without a Trace
2002
UC: Undercover
2001
The Chronicle
2001
Special Unit 2
2001
The Invisible Man
2000
Martial Law
1998
The Practice
1997
Star Trek: Voyager
1995
M.A.N.T.I.S.
1994
The X-Files
1993
Silk Stalkings
1991