McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.

Gus and Shawn’s childhood nemesis, now a horse jockey, asks the duo for help in discovering why his horses never win. But the investigation develops into a murder case after…

Sam & Dean track down changelings that are pursuing mothers and their children. A boy they protect bears a strange resemblance to Dean, which at first makes Dean uncomfortable because…