Supernatural (2005)

S10E01 Black

Dean, now a demon, is wreaking havoc alongside Crowley, leaving chaos in their wake. Meanwhile, Sam is on a desperate quest to uncover the truth behind his brother's transformation. As he searches for answers, Castiel confronts his own challenges, struggling with the diminishing strength of his grace. The tension builds as the brothers face their respective battles, each fighting against the odds in their own way.