Supernatural (2005)

S12E2 Mamma Mia

In "Mamma Mia," Dean, Castiel, and Mary uncover a promising lead on Sam's whereabouts and prepare for his rescue. Despite Dean's reservations about putting Mary in harm's way, she is determined to join the effort. Concurrently, Crowley receives word that Lucifer has possessed the body of the famous rock musician, Vince Vicente, raising the stakes in their ongoing battle against the fallen angel.