BILLIE RETURNS…BUT NOT LIKE BEFORE – While working on a case involving the ghost of a demented doctor, Sam (Jared Padalecki) and Dean (Jensen Ackles) get assistance from an unexpected source – Billie (guest star Lisa Berry). Castiel (Misha Collins) finds his way back to the Winchesters.

Written by: Steve Yockey
Directed by: John Showalter