About Episode

Sam calls Dean late at night and says that he wants to rejoin Dean in the battle of the Apocalypse, but Dean tells Sam that they're better off apart. Later, Dean awakens five years in the future in an abandoned city and is attacked by humans who have been infected with a demonic disease, the Croatoan virus. After Dean has escaped the assault, Zachariah appears to him and explains that this world is the result of Dean saying no to being Michael's vessel. He then discovers a group of survivors led by his future self. When he sneaks into the camp, he is captured by his future self, who explains that the virus is Lucifer's endgame for destroying mankind. Supposedly, Sam did not survive the showdown. Later it is revealed that Sam didn't die, but did in fact say yes to Lucifer, thus letting him in. After having acquired the Colt from demons, Future Dean plans on killing Lucifer and ending the Apocalypse. Walking straight into a trap, Future Dean is killed by Lucifer. Lucifer reveals that, whatever choices Dean will make, he will always end up in the same situation. Lucifer leaves and Zachariah appears, teleporting Dean back to the year 2009. When Dean refuses to be Michael's vessel, even after he's seen what his decision might result in, Zachariah attempts to persuade him with force. Castiel saves Dean from Zachariah's wrath just in time. Ultimately, Dean and Sam reconcile and decide to begin hunting together again.