On this week's Supernatural, the second to last of the season, Castiel tells Sam, Dean and Bobby about the war in Heaven and how he and Raphael became enemies.

Bobby believes Castiel is hiding something, but Dean refuses to believe it.

Basically, all hell is about to break loose. Don't believe us? Check out this promotional image and multiple clips from "The Man Who Would Be King" below ...

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.