The French Mistake (VIDEO)

When Raphael puts a hit list out on Castiel's allies, including Sam, Dean and Bobby, Balthazar teleports the brothers to a safe place - an alternate reality in which the Sam and Dean are actually two actors named Jared and Jensen, who star in a popular TV series called Supernatural.

Sam and Dean discover that everyone they knew in their own reality is now an actor in this new world - Castiel is a Twitter-obsessed actor called Misha; while Sam/Jared lives in a palatial mansion with his wife, an actress called Genevieve, who plays Ruby in the series. The brothers try to find a way out of their surreal nightmare, but find themselves delayed time and again by the cast and crew.

Virgil, one of Raphael's assassins, finds his way into the universe and, after killing Misha and executive producer Bobby Singer, targets the brothers. But the brothers are suddenly pulled back into their own reality by Raphael (in a new female meat suit).

Balthazar and Castiel appear and reveal that sending them into that world was a ruse to divert Raphael's attentions from the real deal: Castiel now owns the weapons of Heaven. But what does he want them for?