Bobby Singer: Normal year, I hear of... say, three demonic possessions. Maybe four, tops. This year, I heard of 27 so far. You get what I'm saying? More and more demons are walking among us. A lot more.

Sam Winchester: Do you know why?

Bobby Singer: No, but I know it's something big. Storm's coming. And you boys and your daddy... you are smack in the middle of it.