Supernatural, Ep 8.19: “Taxi Driver” sees the Winchesters lose a valuable ally while gaining a questionable new one
For most of Supernatural’s run, the Winchester brothers have found themselves on the reactionary end of things, racing to stop threats and avenge loved ones with the entities they’re fighting, from Azazel to the Leviathan, staying one step ahead most of the time. Closing the gates to Hell, however, marks a rare instance where the brothers are proactive, as they have been able to go about their actions with Crowley and Naomi, the main antagonistic forces, trying to catch up to them, rather than the other way around.