In Supernatural Season 2, Episode 8, "Crossroad Blues," Sam and Dean Winchester investigate deaths linked to a demon making soul-binding deals, heavily referencing the blues musician Robert Johnson. Dean confronts the demon, forcing her to release a victim's soul while rejecting a deal to bring back his father. Detailed plot, transcript, and analysis are available on the Supernatural Fandom Wiki . "Supernatural" Crossroad Blues (TV Episode 2006) - IMDb