Acting
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.
Titles
NCIS
2003
Supernatural
2005
CSI: Crime Scene Investigation
2000
Doctor Who
2005
The X-Files
1993
24
2001
Monk
2002
Charmed
1998
Star Trek: Voyager
1995
White Collar
2009
Without a Trace
2002
Battlestar Galactica
2004
Las Vegas
2003
V.I.P.
1998
Medium
2005
Burn Notice
2007
Warehouse 13
2009
Chuck
2007
The Practice
1997
MacGyver
2016
Sliders
1995
Leverage
2008
Secret Level
2024
Doom Patrol
2019
Firefly
2002
Silk Stalkings
1991
In Plain Sight
2008
Dollhouse
2009
Martial Law
1998
Shark
2006
Fastlane
2002
Jake 2.0
2003
In the Name of the Father
1993
The Invisible Man
2000
Bionic Woman
2007
Special Unit 2
2001