Watch Supernatural Season 8 Episode 12 online via TV Fanatic with over 7 options to watch the Supernatural S8E12 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, TNT, and Verizon On Demand.
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A man who claims to be Sam and Dean's grandfather says he's time traveled in order to stop a demon on Supernatural.