 When Crowley admits that he cannot get Sam's soul back, Castiel burns Crowley's human remains.At the end of the episode Castiel explains to Sam and Dean that the celestial war is not going well for him and he would rather be on Earth with them, but leaves anyway to continue fighting, but promises to take care of Crowley's captured monsters first.After acquiring the holy weapons from Balthazar in "The French Mistake", Castiel suggests that he now has a military advantage in the war.