Didn't like the episode at all. Sam giving up and his wound being tied with hope was a stupid plot device. Like for real, how in hell he just gave up because of few visions? Even if they were true, Sam is not that kind of person, as does Dean. Even if they'd turn evil and become werewolves, Sam and Dean would rather have that ending because they'd be free to choose their own fate, instead of a higher entity controlling them and everything. Besides that, Cass can overpower a Leviathan but gets stomped by a lowest ranking demon. Great consistency writers.