Supernatural 12×04 “American Nightmare” Sneak Peek – Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a case that leads them to a devout religious family that lives off the grid. The brothers realize that the parents are hiding a huge secret that could destroy them all. Meanwhile, Dean struggles to accept Mary’s (guest star Samantha Smith) latest decision. Davy Perez wrote the episode directed by John Showalter (#1204). Original airdate 11/3/2016.