Even before his time as a main cast member on "Supernatural," you had likely seen Mark A. Sheppard in action, probably in some type of villainous role. One of his earliest television gigs was actually on The Brit played the pyrokinetic monster-of-the-week villain Cecil L'Ively in the Season 1 episode "Fire.
Before he played Crowley, Sheppard's most famous roles were the Season 5 villain Ivan Erwich on "24," recurring attorney Romo Lampkin on "Battlestar Galactica," and insurance investigator James Sterling on "Leverage.
Upon leaving Crowley behind, Sheppard went back to being a guest star with a turn in a Season 1 episode of the "MacGuyver" reboot, but that was just a one-time thing.
Mark A. Sheppard was less than thrilled about how his run on "Supernatural" came to an end.
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