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, ...
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In the Name of the Father
As Paddy Armstrong
Unstoppable
As Leitch
Doctor Who Explained
As Self
Megalodon
As Mitchell Parks
Doctor Who: Farewell to Matt Smith
Lady in the Box
Soldier of Fortune, Inc
As Christopher 'C.J.' Yates
Lost Voyage
As Ian Fields
Xtinction: Predator X
As Dr. Charles LeBlanc
Mysterious Island
As Young Captain Nemo
Deep Shock
As Chomsky
New Alcatraz
As Yuri
Out of the Cold
As Fang
Sons of Liberty
As Ackley
Lover's Knot
As Nigel Bowles
Broken
As Malcolm
Farewell, My Love
As M. J.
Evil Eyes
As Peter
Ever After
As The Ringmaster
Martial Law
CSI: Crime Scene Investigation
As Rod Darling
Shark
Bionic Woman
The Chronicle
Battlestar Galactica
As Romo Lampkin
24
As Ivan Erwich
The Practice
As Eddie Wicks
Soldier of Fortune, Inc.
As CJ Yates
Sliders
As Jack
M.A.N.T.I.S.
Charmed
As Arnon
Star Trek: Voyager
As Leucon
V.I.P.
As Nero
Special Unit 2
As The Chameleon
The X-Files
As Bob the Caretaker / Cecil L'Ively
Supernatural
As Crowley
Fastlane
As Ronan Dennehy
White Collar
As Curtis Hagen
Firefly
As Badger
I Love 1990s
Warehouse 13
As Benedict Valda
Monk
As Chris Downey
MacGyver
As Fake Dr. Zito
Chuck
As Ring Director
UC: Undercover
Doctor Who
As Canton Delaware
Dollhouse
As Tanaka
Medium
As Charles Walker
In Plain Sight
As Russell
Without a Trace
As Johnny Patani
Doom Patrol
As Willoughby Kipling
The Invisible Man
As Yuri Gregorov
Leverage
As Jim Sterling
The Middleman
As Manservant Neville
Burn Notice
As Tom Prescott
Silk Stalkings
As Eric
Walker Independence
As Hagan
NCIS
As Young Mr. Pain (uncredited)
Secret Level
As Astropath / Ultramarines Orbital Command (voice)
Jake 2.0
As Hartman
