Mark Sheppard is known for his roles as Romo Lampkin (2007-2009) on the Syfy TV show_"Battlestar Galactica (2004-2009)"_ and as Crowley (2009-2017) on the TV show "Supernatural (2005-)".

Some other TV shows he appeared on are "Soldier of Fortune, Inc.", "Sliders", Martial Law", "Star Trek: Voyager", "JAG", "CSI: Crime Scene Investigation", "Charmed", "Firefly", "Las Vegas", "Medium", "Shark", "Leverage", "NCIS", "Burn Notice", "Warehouse 13", "Doctor Who" and "Macgyver (2016)".

Happy Birthday!