This episode could've been good, but they KILLED Charlie. Wtf would they do that? Why kill off one of your most beloved characters? It was basically used as a plot point to push Dean over the edge in the next episode and I hated it. Also Sam going behind Dean's back is getting old. I don't know why Dean would automatically assume Sam burned the Book of the Damned, when he knows how desperate Sam is to save him. Everyone in this episode made incredibly stupid decisions. Last thing, in season 9 Sam said he wouldn't save Dean and yet that's what this whole season has been about. 🙃