My best guess on the killings is that some of them (the father, the hangman) had sold their souls at some earlier date and the demon was using Gunnar to move up collection, the way that one demon did in Season 7 Time For a Wedding. Then there was Shawn who was killed because he said no and I have no idea if they got his soul or not. I mean if soul can be stolen that easily, why bother with deals? It's not like demons are squeamish about killing people?

I really hated that Gunnar's murdering people was so glossed over. Once he killed Shawn, "you were a guy who made a mistake" went out the door, for me. Yes, it's nice that that he decided to save Dean, but really? He's a serial killer, since we know there had been more murders before The Hangman.

I'm not convinced the Hands of God can only be used once. Two is not a large sample and way to small to prove anything other than SOME HOGs can be used only once. So I'm holding off on that for now.