@IGN News...The Walking Dead star, sterne Jeffrey Dean morgan is officially returning to Supernatural for its milestone 300th episode after Mehr than a decade away.
Sam (Jared Padalecki), Dean (Jensen Ackles) and Castiel (Misha Collins) are transported into the animated world of Scooby Doo where they Mitmachen forces with the Scooby gang to solve a ghostly mystery.