"I wasn't really in a good place at this time," Derek tells him, shrugging one shoulder. "I was pretty much just living in the woods as a wolf. I think it was partly to get me to act like a person again."

He still isn't sure of that, but he thinks that might have been part of Castiel's reasoning for inviting him. He is married to a ghost hunter, after all. "I shifted back and walked around the lodge with him, and we made sure the ghosts weren't a threat. Dean would have taken care of them if they were."