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.
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Secret Level
Astropath / Ultramarines Orbital Command (voice) · (1 episode)
2024
Walker Independence
Hagan · (5 episodes)
2022
Doom Patrol
Willoughby Kipling · (12 episodes)
2019
MacGyver
Fake Dr. Zito · (1 episode)
2016
Doctor Who: Farewell to Matt Smith
2013
Doctor Who Explained
Self
2013
Sons of Liberty
Ackley
2013
Mysterious Island
Young Captain Nemo
2010
Xtinction: Predator X
Dr. Charles LeBlanc
2010
White Collar
Curtis Hagen · (6 episodes)
2009
Warehouse 13
Benedict Valda · (6 episodes)
2009
Dollhouse
Tanaka · (3 episodes)
2009
Leverage
Jim Sterling · (7 episodes)
2008
The Middleman
Manservant Neville · (2 episodes)
2008
In Plain Sight
(1 episode)
2008
Broken
Malcolm
2007
Bionic Woman
(1 episode)
2007
Chuck
Ring Director · (2 episodes)
2007
Burn Notice
Tom Prescott · (1 episode)
2007
Shark
(1 episode)
2006
Supernatural
Crowley · (102 episodes)
2005
Doctor Who
Canton Delaware · (2 episodes)
2005
Medium
Charles Walker · (3 episodes)
2005
Unstoppable
Leitch
2004
Battlestar Galactica
Romo Lampkin · (7 episodes)
2004
Evil Eyes
Peter
2004
Megalodon
Mitchell Parks
2004
NCIS
Young Mr. Pain (uncredited) · (1 episode)
2003
Deep Shock
Chomsky
2003
Jake 2.0
Hartman · (1 episode)
2003
Without a Trace
Johnny Patani · (1 episode)
2002
Firefly
Badger · (2 episodes)
2002
Fastlane
Ronan Dennehy · (1 episode)
2002
Monk
Chris Downey · (1 episode)
2002
New Alcatraz
Yuri
2001
24
Ivan Erwich · (6 episodes)
2001
Lost Voyage
Ian Fields
2001
UC: Undercover
(1 episode)
2001
I Love 1990s
(10 episodes)
2001
The Chronicle
(1 episode)
2001
Special Unit 2
The Chameleon · (1 episode)
2001
Lady in the Box
2001
CSI: Crime Scene Investigation
Rod Darling · (1 episode)
2000
CSI: Crime Scene Investigation
Dimitri Sadesky · (1 episode)
2000
The Invisible Man
Yuri Gregorov · (1 episode)
2000
Farewell, My Love
M. J.
2000
Out of the Cold
Fang
1999
Soldier of Fortune, Inc
Christopher 'C.J.' Yates
1999
Charmed
Arnon · (1 episode)
1998
Martial Law
(1 episode)
1998
V.I.P.
Nero · (2 episodes)
1998
Soldier of Fortune, Inc.
CJ Yates · (20 episodes)
1997
The Practice
(1 episode)
1997
Lover's Knot
Nigel Bowles
1996
Sliders
Jack · (1 episode)
1995
Star Trek: Voyager
Leucon · (1 episode)
1995
M.A.N.T.I.S.
(1 episode)
1994
In the Name of the Father
Paddy Armstrong
1993
Ever After
The Ringmaster
The X-Files
Bob the Caretaker / Cecil L'Ively · (1 episode)
1993
Silk Stalkings
Eric · (1 episode)
1991