Supernatural is about to go all meta. Meaning what, exactly?

On "The French Mistake," Balthazar sends Sam and Dean to an alternate universe for protection from an angelic hitman. In this other reality, the brothers are stars of a TV show... titled Supernatural... and their names are “Jensen Ackles” and “Jared Padalecki.”

Castiel then appears... as an actor named Misha Collins. Confusing? A bit. Intriguing? Definitely. Watch this promo and learn more:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.