ache it ‘til you make it

Sam feels guilty for not being there to dig him up, but he really didn't think it had worked. But whatever, right? Dean is back. And he's hunting monsters. And he's...fine.

But something is off. Dean fights and kills like he used to, but he doesn't quite laugh right. He goes through the motions like he's on autopilot. And Bobby says this was too easy, but Sam ignores him - Dean already did all the tests. He's human. And besides, he just got back from Hell, right? There's bound to be an adjustment period. Anyway, Sam saved him from Hell. He did a good thing.

Then - Castiel appears, crashing into Earth, confused and angry, sent down to investigate what Heaven considers a critical security breach.

Who are you?

I'm the one who gripped you tight and raised you from perdition.

That's not true, Sam says. I did it. With the ritual. I brought Dean back.

- You defeated the darkness once before. - You mean when I was one day old? All I did was scream, wet myself, and wonder "What the heck is going on?" Apart from gaining some decent bladder control, nothing has changed!