“In Season 9, fans can expect a much more in-depth look at Castiel's life, his relationships, and his choices. We'll come to understand him on a different level than we've seen before.
"One of the things you evaluate when you talk about bringing someone back in a big way is, whether there are new ways to be telling stories with this particular character," Carver says. "And I can't tell you much, but I can absolutely, definitively say that with Castiel -- yes, there's a new way to tell his story. We'll get a very large hint about that in the finale. I think fans are going to be really intrigued.”