exterior, the alleyway from the end of 13.05, Sam and Dean beside the Impala, and Cas waiting for them by the phone booth]
DEAN: Cas, is that really you?
SAM: No. You're – you're dead.
CASTIEL: Yeah, I was. But then I… annoyed an ancient cosmic being so much that he sent me back.
SAM: I don't even know what to say.
DEAN: I do. Welcome home, pal.
[Dean embraces Cas, and then Sam hugs Cas]
CASTIEL: How long was I gone?
DEAN: Too damn long.
SAM: Where were you? In Heaven?
CASTIEL: No. No, I was in the Empty.
DEAN: Really?
CASTIEL: Apparently, it's where angels and demons go when they die.
SAM: What was it like?
CASTIEL: Well, it's dark and...nothing.
[we see scenes from 13.04, of Cas's experiences in the Empty]
CASTIEL: It's like...nothing. I was sleeping, and then I heard a voice that said my name, and I woke up. I thought you… had done something.
DEAN: No, we… we didn't even think we could bring you back.
SAM: So who was it? Chuck – uh, God?
CASTIEL: No. No, he has no power in the Empty.
DEAN: Well, then, who does?
SAM: Jack.

[Interior, the bunker's library, Jack is typing away at his laptop when Dean and Sam enter.]
JACK: How'd it go?
DEAN: Well…
SAM: Jack, um…
JACK: What's wrong?
CASTIEL: Hello, Jack.
JACK: Castiel?
CASTIEL: [Sighs] Yeah, it's me.
JACK: No. We burned your body, and what's burned stays dead. How...
DEAN: Well, that's the question we've been askin'.
SAM: Jack… did you, uh… Did you bring Cas back?

Jack smiles and says ''I wanted him back well Chaos you God's father he was the one who told me I had that power so he had Lucifer teach me how to use my powers ''.

Red Face Castiel goes to speak when suddenly Dean says '' Well your father did a good thing ... did he say why God's Father wanted Castiel back ''? Paling at that Castiel listens as Jack nods and sits back down crossing his legs and says '' Yes there's a war coming and the balance was broken so he Brought Castiel back to rule Purgatory alongside the demon Crowley they are hereby charged to rule Purgatory in Heaven's name ''.
Jack stands with a little broken smile and lets his wings out making Sam and Dean eyes go wide at the visible wings when Jack disappears with a flap of his wings ''. Gasping Castiel falls into his chair and says '' Explain ''.