Mark Andreas Sheppard is a British-American 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.
| Movie | Mysterious Island | 2010 |
| Episode |
V.I.P. 48½ Hours |
2002 |
| Episode |
Warehouse 13 Around the Bend |
2010 |
| Episode |
White Collar At What Price |
2013 |
| Episode |
Burn Notice Bad Breaks |
2009 |
| Episode |
Warehouse 13 Beyond Our Control |
2010 |
| Episode |
Medium Blood Relations |
2006 |
| Episode |
Battlestar Galactica (2003) Blood on the Scales |
2009 |
| Episode |
The Chronicle Bring Me the Head of Tucker Burns |
2001 |
| Episode |
Warehouse 13 Buried |
2010 |
| Episode |
Star Trek: Voyager Child's Play |
2000 |
| Episode |
MacGyver (2016) Cigar Cutter |
2017 |
| Episode |
Battlestar Galactica (2003) Crossroads (1) |
2007 |
| Episode |
Battlestar Galactica (2003) Crossroads (2) |
2007 |
| Episode |
Battlestar Galactica (2003) Crossroads (2) |
2007 |
| Episode |
Doom Patrol Cult Patrol |
2019 |
| Episode |
Doom Patrol Dad Patrol |
2020 |
| Episode |
24 Day 5: 3:00 P.M. - 4:00 P.M. |
2006 |
| Episode |
The Practice Day in Court |
1999 |
| Episode |
Doctor Who (2005) Day of the Moon (2) |
2011 |
| Episode |
Battlestar Galactica (2003) Daybreak (1) |
2009 |
| Episode |
White Collar Digging Deeper |
2013 |
| Episode |
The Invisible Man Diseased |
2001 |
| Episode |
Medium Doctor's Orders |
2006 |
| Episode |
Doom Patrol Dumb Patrol |
2020 |
| Episode |
The X-Files Fire |
1993 |
| Episode |
Doom Patrol Fun Size Patrol |
2020 |
| Episode |
CSI: NY Hush |
2005 |
| Episode |
White Collar Live Feed |
2014 |
| Episode |
UC: Undercover Manhunt |
2002 |
| Episode |
Inside Of You Mark Sheppard |
2019 |
| Episode |
Fastlane Monster |
2003 |
| Episode |
Monk Mr. Monk vs. the Cobra |
2005 |
| Episode |
Sliders Net Worth |
1999 |
| Episode |
Shark One Hit Wonder |
2008 |
| Episode |
Doom Patrol Paw Patrol |
2019 |
| Episode |
Medium Penny for Your Thoughts |
2005 |
| Episode |
Doom Patrol Possibilities Patrol |
2021 |
| Episode |
Without a Trace Requiem |
2006 |
| Episode |
Firefly Serenity |
2002 |
| Episode |
Firefly Shindig |
2002 |
| Episode |
Battlestar Galactica (2003) Sine Qua Non |
2008 |
| Episode |
Inside Of You Supernatural’s MARK SHEPPARD: Filling a Void |
2022 |
| Episode |
Leverage The 12-Step Job |
2009 |
| Episode |
Leverage The Broken Wing Job |
2012 |
| Episode |
The Middleman (2008) The Clotharian Contamination Protocol |
2008 |
| Episode |
Doctor Who: The Doctors Revisited The Eleventh Doctor |
2013 |
| Episode |
Leverage The First David Job (1) |
2009 |
| Episode |
CSI: Crime Scene Investigation The Hunger Artist |
2002 |
| Episode |
Doctor Who (2005) The Impossible Astronaut (1) |
2011 |
| Episode |
Leverage The Long Goodbye Job |
2012 |
| Episode |
CSI: Crime Scene Investigation The Lost Girls (3) |
2009 |
| Episode |
Leverage The Maltese Falcon Job (2) |
2010 |
| Episode |
The Middleman (2008) The Palindrome Reversal Palindrome |
2008 |
| Episode |
Leverage The Queen's Gambit Job |
2011 |
| Episode |
Leverage The Second David Job (2) |
2009 |
| Episode |
Special Unit 2 The Skin |
2001 |
| Episode |
Battlestar Galactica (2003) The Son Also Rises |
2007 |
| Episode |
Leverage The Three Strikes Job (1) |
2010 |
| Episode |
Firefly The Train Job |
2002 |
| Episode |
Leverage The Two-Horse Job |
2008 |
| Episode |
Leverage The Zanzibar Marketplace Job |
2010 |
| Episode |
Leverage The Zanzibar Marketplace Job |
2010 |
| Episode |
In Plain Sight To Serge with Love |
2008 |
| Episode |
Doom Patrol Undead Patrol |
2021 |
| Episode |
Doom Patrol Wax Patrol |
2020 |
| Episode |
Supernatural Weekend at Bobby's |
2010 |
| Episode |
Jake 2.0 Whiskey - Tango - Foxtrot |
2003 |
| Episode |
Charmed Witches in Tights |
2002 |
