Medical resident Liv Moore becomes a zombie and loses her ambition until she begins working at the city morgue to gain access to brains that give her sustenance and allow…

MacLaren urges Yates to help him when a Traveler with a mission vital to humanity’s survival arrives in the body of a just-captured serial killer.

Sam and Castiel follow up on a lead about the Mark of Cain. Dean and Rowena meet.