(The Zeljko Ivanek Hall of Fame is where we turn the spotlight on a television actor or actress, and it is named after their patron saint, Zeljko Ivanek)
Mark Sheppard has quickly and sometimes quietly carved out a career as a regular television antagonist, slowly appearing in more recurring roles as the years go on. Sheppard’s first roles came in a couple of episodes of Silk Stalkings, an early ‘90s crime drama, in 1992 and 1993. He then appeared in first season episode “Fire” of the X-Files as Cecil L’ively, a man with pyrokinetic abilities. The episode is regarded as so-so, but his performance is generally praised. He then showed up in an episode of M.A.N.T.I.S. in 1995. His next television appearances didn’t come until he appeared in TV movie Soldier of Fortune, Inc., and then in the ensuing television series of the same name in which he reprised the same role, both in 1997. He played Staff Segeant Christopher “C.J.” Yates, whose expertise were in demolitions and electronic surveillance.
In the last couple of years of the decade, he made single appearances in Sliders, Martial Law, and The Practice, and then in 2000, he showed up in a Star Trek: Voyager and a JAG. He showed up in Charmed in 2002 and then in two episodes of Firefly as Badger, an unscrupulous black market businessman who commissions the crew for a mission. He is not well liked, but is just trustworthy enough to do business with. In 2004 and 2005, he appeared in episodes of Las Vegas, CSI: NY and Monk and then as a recurring villain in the fifth season of 24. He played Ivan Erwich, a member of the Russian separatist movement at the heart of that season’s plot, attempting to use deadly Sentox gas first against Russians, but then against Americans. He was eventually killed by the leader of the movement for wasting a canister of the gas and trusting some untrustworthy Americans intelligence men. At about the same time he played Patricia Arquette’s nemesis, Dr. Charles Walker, a psychotic killer from the 19th century on Medium.
In 2007, he appeared in three episodes of the short-lived Bionic Woman remake, as well as episodes of Shark, In Plain Sight, and NCIS. During the same period, he was on the reimagining of Battlestar Galactica as canny and self-righteous lawyer Romo Lampkin. Lampkin critically defends Gaius Baltar and helps Starbuck out during the great mutiny of the fourth season. He was in a Burn Notice and three episodes of Dollhouse as well as the first episode of White Collar, where he played the antagonist, a forger. He was in four episodes of Warehouse 13 and two of Chuck as the head, or Director, of The Ring, an evil spy organization which is the key antagonist of season 3.
He currently appears in a recurring role on Leverage as Timothy Hutton’s character, Nathan Ford’s main rival, Jim Sterling, who replaced Ford at the insurance firm where Ford used to work, and used his work with Ford’s team to win a job with INTERPOL. He also currently appears as recurring character Crowley in Supernatural, a, um, Crossroads demon (I don’t know it is either) who becomes at one point King of Hell. In addition to these, he had the rare treat of playing the same character as his father in Dr. Who; he played the younger Captain Everett Delawre III, while his father, William Morgan Sheppard, played the older version.
Television, the Drug of the Nation 
Obviously a Crossroads Demon is a demon of the crossroads, to whom you can sell your soul to revive your brother, at a frequency of once a year.
I mock out of love, Supernatural.