Last week Supernatural took a slightly tarter tone after several weeks of quirky, self-referential fun. Given the episode's premise, I think it was a good compromise for Adam to actually be John's son, but for him to never appear on camera in his mortal state. The ghoul's revelation that Adam really was a Winchester was morbid and melancholy but also satisfying. It added to the series' legacy without screwing up the essential formula.
This Thursday Supernatural comes back with "The Rapture," which looks to continue the series' return to darker, more through-line oriented stories. But that doesn't mean the premise won't have you scratching your chin as you wonder, "How could that happen? What's really going on here?"
According to the CW's official Supernatural press release, "Castiel (Misha Collins) appears to Dean (Jensen Ackles) in a dream and says he has something important to tell him but they need to meet somewhere private. Dean and Sam (Jared Padalecki) go searching for Castiel but instead find Jimmy, Castiel's human vessel, who has only a spotty recollection of being an angel. Jimmy wants to return to his family and normal life, but Dean and Sam are concerned about his safety."
The clip shows the emergence of Jimmy, and I have to say he does not 'sound' like Castiel. Take a look.