When a series of mysterious disintegration deaths occur in Pittsburgh, the team discovers that the artifact responsible, Joshua’s Horn, has ties to Helena’s time as an agent in 1893.

Earth and Mars search for answers in the aftermath of the asteroid collision.

Sam and Dean enlist the help of their pal Garth to gain inside information on what Michael may be planning. The brothers split up to each go after weapons that…

Sam finds a clue to Dean’s whereabouts, so he, Mary and Bobby set out to investigate. Castiel imparts some sage advice on Jack, who, still desperate to belong, seeks out…