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Dean gets a message to meet with Castiel on important business, but he and Sam discover that Castiel has been recalled to Heaven and his human host body, Jimmy Novaks, has no memory of what happened or what Castiel knew. Unfortunately, the demon forces don't know that, and wouldn't care if they did, and will go to any lengths to get Jimmy for themselves.
Dean is dreaming of fishing on a dock when Castiel appears in his mind. The angel says they need to talk but warns that Dean’s dreams aren’t secure. He gives Dean an address with a piece of paper and tells him to meet him there. After Dean wakes up, he and Sam go to the address and find a building devastated by some great battle. Inside on one wall is the symbol that Anna used to send angels back to Heaven. They also find Castiel, unconscious. When they wake him up, it quickly becomes clear that it isn’t Castiel, but Jimmy Novak: Castiel’s willing host body...Read the full recap
Dean: Point is, you used to be strong enough to kill Alastair. Now you can't even kill stunt demon #3.
Dean: Cas, hold up. What were you going to tell me?
Castiel: I learned my lesson while I was away, Dean. I serve Heaven, I don't serve Man. And I certainly don't serve you.