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Sam and Dean singing "Wanted Dead or Alive" in this episode calls back to [[2.14 Born Under a Bad Sign]], when the possessed Sam listens to Bon Jovi. The album from which the song is taken is titled ''Cross Road'', another possible nod towards Dean's deal with the crossroads demon. [[Jared Padalecki]] starred in the movie [http://www.imdb.com/title/tt0384286/ ''Cry Wolf''] alongside [http://www.imdb.com/name/nm0000954/ Jon Bon Jovi].
That is the last appearance of [[Katie Cassidy]] as Ruby and main cast member.