The sight of Castiel slain, bound and broken to that chair, was the most horrifying thing Gadreel had seen in his long and painful life. (AU as of 9.03 No Angel)

Team Free Will is dragged into conflict between God's hitman and a prisoner of Heaven. Castiel's brother sends a demon to break him while Dean faces the thought of losing his family. Alliances are made, everyone is taking damage, and the Winchesters again find themselves in the middle of Angel Family Feud.

Growing up as a psychic in a world where monsters are common knowledge has never been easy for 14 year old Sam. He's been shipped from hunter to hunter, always watched. When he meets John, Mary, and their son Dean, he feels like he's finally found a family. However, someone has a different plan for him. Someone with a heart full of vengeance, and a thirst for revenge. AU world.

AU to season 4. DemonDean. Dean clawed his way out of Hell as a demon intent on stopping the apocalypse and the plans for his brother. Sam refuses to believe that this creature is Dean. They'll have to work together in order to stop the end of the world.

I had an idea about what that crazy FBI agent might do if he got his hands on Sam. Here it is. Now expanded by request.