Chuck Shurley (played by Rob Benedict) is a pseudonym used by God.  Chuck/God at first reveals himself as the author of the Supernatural book series, which tells the story of Sam and Dean to legions of fans.  However, as time goes on, it becomes clear that Chuck is truly a power hungry villain.  Long before humans, Chuck locked his sister Amara away to protect earth, but he eventually decides to end the world himself when the Winchesters refuse to acquiesce to his wishes.

12345