Sam tells Dean he wants to rejoin Dean in the battle of the Apocalypse, but Dean tells Sam that they are 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 virus that turns humans into Zombies. Zachariah appears to Dean and explains that this is the world that exists as a result of Dean saying no to helping the angels fight Lucifer. Dean meets up with Future Dean, who tells him that the virus is the Devil’s endgame for destroying mankind.

THEN: Supernatural split up the Winchesters.  Sam got a job as a bartender before finding out that he is Lucifer‘s perfect vessel.  Dean and Cas learned about prostitutes with daddy issues, the possibility that God is dead, and the theory that Lucifer brought Cas back to life.NOW: It‘s time to go back.  Back...to the future!  But before we do, it might be helpful to check out this little refresher course on Croatoan, a demonic virus first shown waaaaaaaay back in season 2.
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