Biography
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.
Filmography47 titles
The X-Files
Supernatural
Firefly
White Collar
Battlestar Galactica
Charmed
Monk
In the Name of the Father
24
Star Trek: Voyager
Warehouse 13
The Middleman
Chuck
The Practice
Leverage
Doctor Who
NCIS
CSI: Crime Scene Investigation
Sliders
Doom Patrol
Burn Notice
Medium
Secret Level
MacGyver
Without a Trace
Dollhouse
In Plain Sight
Las Vegas
The Invisible Man
Shark
Walker: Independence
Fastlane
Bionic Woman
Kin
Silk Stalkings
Broken
Deep Shock
V.I.P.
M.A.N.T.I.S.
Unstoppable
Lost Voyage
Mysterious Island
Farewell, My Love
New Alcatraz
Sons of Liberty
Xtinction: Predator X
Evil Eyes