Changes

* 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 [[AU|alternate universe]] model.