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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Known for Supernatural 2005 The X-Files 1993 Doctor Who 2005 Charmed 1998 Series ★ 7.4 Secret Level 2024
Astropath / Ultramarines Orbital Command (voice) Series ★ 6.7 Walker Independence 2022
Hagan Series ★ 7.5 Doom Patrol 2019
Willoughby Kipling Series ★ 7.3 MacGyver 2016
Fake Dr. Zito ★ 4.5 Mysterious Island 2012
Young Captain Nemo ★ 3.7 Xtinction: Predator X 2010
Dr. Charles LeBlanc Series ★ 8.2 White Collar 2009
Curtis Hagen Series ★ 7.7 Warehouse 13 2009
Benedict Valda Series ★ 7.2 Dollhouse 2009
Tanaka Series ★ 7 In Plain Sight 2008
Russell Series ★ 7.6 Leverage 2008
Jim Sterling Series ★ 7.7 The Middleman 2008
Manservant Neville ★ 5.6 Broken 2007
Malcolm Series ★ 6.4 Bionic Woman 2007
Anthony Anthros Series ★ 7.7 Chuck 2007
Ring Director Series ★ 7.5 Burn Notice 2007
Tom Prescott Series ★ 6.7 Shark 2006
Rupert Stone Series ★ 8.3 Supernatural 2005
Crowley Series ★ 7.6 Doctor Who 2005
Canton Delaware Series ★ 7.5 Medium 2005
Charles Walker ★ 5.2 Unstoppable 2004
Leitch ★ 4.5 Megalodon 2004
Mitchell Parks Series ★ 8.2 Battlestar Galactica 2004
Romo Lampkin ★ 5.2 Deep Shock 2003
Chomsky Series ★ 7.6 NCIS 2003
Young Mr. Pain (uncredited) Series ★ 7 Jake 2.0 2003
Hartman Series ★ 7 Las Vegas 2003
George Beckwahr Series ★ 6.5 Fastlane 2002
Ronan Dennehy Series ★ 8.3 Firefly 2002
Badger Series ★ 7.9 Monk 2002
Chris Downey Series ★ 7.2 Without a Trace 2002
Johnny Patani ★ 4.7 Lost Voyage 2001
Ian Fields ★ 3.8 New Alcatraz 2001
Yuri Series ★ 7.8 24 2001
Ivan Erwich Series ★ 7.2 Special Unit 2 2001
The Chameleon Series ★ 7.6 CSI: Crime Scene Investigation 2000
Rod Darling Series ★ 7.1 The Invisible Man 2000
Yuri Gregorov Series ★ 7 Martial Law 1998
Clay Sullivan Series ★ 8.2 Charmed 1998
Arnon Series ★ 5.3 V.I.P. 1998
Nero Series ★ 7.6 The Practice 1997
Eddie Wicks Series ★ 7.6 Sliders 1995
Jack Series ★ 7.8 Star Trek: Voyager 1995
Leucon ★ 7.9 In the Name of the Father 1993
Paddy Armstrong Series ★ 8.4 The X-Files 1993
Bob the Caretaker / Cecil L'Ively Series ★ 6.2 Silk Stalkings 1991
Eric 
