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Summary
While working on a case involving the ghost of a demented doctor, Sam and Dean get assistance from an unexpected source – Billie. Castiel finds his way back to the Winchesters.
Episode Guide
Season 01
Season 02
Season 03
Season 04
Season 05
Season 06
Season 07
Season 08
Season 09
Season 10
Season 11
Season 12
Season 13
Season 14
Season 15