2 Works in 2014!Castiel in the Past
Waking up to Cas pounding to be let in is bad enough. Discovering that it's the Cas from the post-apocalyptic future is worse. But then there's not being able to get hold of the present-day Castiel, and things start to go downhill fast...
Cas never expected to live through Dean's last plan. Now, he's not only alive, he's in the past--before Dean went to Hell, before he made the deal at all. Can a fallen angel and a couple of hunters change the future by altering the past?