Mark Andreas Sheppard (born 30 May 1964) is an English actor and musician, born in London of an Irish-German background. He is often credited as "Mark A. Sheppard". Lately, Sheppard is best known for playing the demon Crowley in the TV series Supernatural. Description above from the Wikipedia article Mark Sheppard, licensed under CC-BY-SA, full list of contributors on Wikipedia.
| Movie | Ever After | The Ringmaster | 2026 |
| Series | Doom Patrol | Willoughby Kipling | 2019-02-15 |
| Series | MacGyver | Fake Dr. Zito | 2016-09-23 |
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| Movie | Doctor Who: Farewell to Matt Smith | 2013-12-25 | |
| Movie | Doctor Who Explained | Self | 2013-11-01 |
| Movie | Xtinction: Predator X | Dr. Charles LeBlanc | 2010-08-18 |
| Movie | Mysterious Island | Young Captain Nemo | 2010-11-03 |
| Series | Dollhouse | Unknown | 2009-02-13 |
| Series | White Collar | Curtis Hagen | 2009-10-23 |
| Series | Warehouse 13 | Benedict Valda | 2009-07-07 |
| Series | Leverage | Jim Sterling | 2008-12-07 |
| Series | In Plain Sight | Unknown | 2008-06-01 |
| Series | The Middleman | Unknown | 2008-06-16 |
| Series | Chuck | Ring Director | 2007-09-24 |
| Movie | Broken | Malcolm | 2007-10-05 |
| Series | Bionic Woman | Unknown | 2007-09-26 |
| Series | Shark | Unknown | 2006-09-21 |
| Series | Medium | Unknown | 2005-01-03 |
| Series | Doctor Who | Canton Delaware | 2005-03-26 |
| Series | Supernatural | Crowley / Shapeshifter | 2005-09-13 |
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| Movie | Evil Eyes | Peter | 2004-08-04 |
| Movie | Unstoppable | Leitch | 2004-10-20 |
| Movie | Deep Shock | Chomsky | 2003-09-17 |
| Series | Monk | Unknown | 2002-07-12 |
| Series | Without a Trace | Unknown | 2002-09-26 |
| Series | Fastlane | Unknown | 2002-09-18 |
| Series | Firefly | Badger | 2002-09-20 |
| Series | Special Unit 2 | Unknown | 2001-04-11 |
| Movie | Lady in the Box | 2001-01-01 | |
| Series | The Chronicle | Unknown | 2001-07-14 |
| Series | UC: Undercover | Unknown | 2001-09-30 |
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| Movie | Lost Voyage | Ian Fields | 2001-10-23 |
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| Movie | Farewell, My Love | M. J. | 2000-02-15 |
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| Series | The Invisible Man | Unknown | 2000-06-09 |
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| Movie | Out of the Cold | Fang | 1999-08-28 |
| Series | Martial Law | Unknown | 1998-09-26 |
| Series | V.I.P. | Unknown | 1998-09-26 |
| Series | The Practice | Unknown | 1997-03-04 |
| Series | Soldier of Fortune, Inc. | Staff Sergeant Christopher 'C.J.' Yates | 1997-09-27 |
| Movie | Lover's Knot | Nigel Bowles | 1996-07-12 |
| Series | Star Trek: Voyager | Unknown | 1995-01-16 |
| Series | M.A.N.T.I.S. | Unknown | 1994-08-26 |
| Movie | In the Name of the Father | Paddy Armstrong | 1993-12-12 |
| Series | The X-Files | Unknown | 1993-09-10 |