Season 10, Episode 21 Dark Dynasty
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First Aired: May 6, 2015
Sam and Dean investigate a bizarre murder and realize the killer has the same tattoo as those from the Styne family. Meanwhile, Castiel acts a referee when Charlie and Rowena are forced to work together on the Book of the Damned; and Crowley discovers his mother is missing, so he turns to an old enemy for help.
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