Sam conducts a desperate search for Dean, unaware that he's now a demon and allied with Crowley. Meanwhile, Hannah appeals to Castiel to help her track down two rogue angels.
Dean continues to defy Crowley, going his own way, and the King of Hell turns to an unexpected ally for help. Meanwhile, Cole tortures Sam for Dean's location, while Castiel grows increasingly worse with the loss of his grace, forcing Hannah turns to an imprisoned Metatron for help.
Sam tries to cure Dean using injections of sanctified blood, but Dean insists that he doesn't want to be cured... and the attempt may kill him. Meanwhile, Crowley discovers that his recent sojourn with Dean has undermined his authority in Hell, and Castiel gets help from an unexpected ally.
A recent string of werewolf attacks points to a surprising culprit--Kate, the werewolf Sam and Dean let live.
Source: The CW
While on a case, Sam and Dean discover that Becky is producing a musical based on their lives... or at least, based on their lives as told by the prophet Chuck in the Supernatural books.