|Dates||August 2014 (presumably deceased after taking part in a surprise attack on Lucifer)|
|Episode(s)||5.04 The End|
Dean: What, are you stoned?
Future!Castiel: Uh...generally, yeah.
Future!Castiel is a version of Castiel five years into the future of 2009. In 2012, Lucifer's minions re-released the Croatoan demon virus - in this post-apocalyptic world, most humans have been reduced to murderous zombies. Castiel is at Camp Chitaqua with Future!Dean, Future!Chuck and other survivors. Future!Castiel informs Dean that sometime after the Croatoan virus was released, the angels left, and so did most of his angelic powers, so that Cas is now effectively human. He can however detect that Dean from 2009 is different from Future!Dean. He is embittered at his situation and has immersed himself in "women and decadence." When Dean first encounters him, he is organizing an orgy, and is a bit out of it. Future!Castiel is now considered a mortal angelic being; in other words he is a powerless angel. The fact that he recognizes that Dean is from the past indicates that he still has some supernatural power. He is presumably killed during the attack on Lucifer.
- There was mixed opinion amongst fans as to whether the future shown here is "real" or merely constructed by Zachariah to persuade Dean to become Michael's Vessel. In the commentary to the episode on the Season 5 DVD Eric Kripke and Ben Edlund describe how initially the episode was going to involve time travel, but the premise became so complicated (they describe drawing it on a whiteboard to explain to Bob Singer who retorted - "You going to do that for the viewers?") that they changed it to an alternate universe model.