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