Watch Supernatural Season 5 Episode 20 online via TV Fanatic with over 8 options to watch the Supernatural S5E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Netflix, YouTube Purchase, Google Play, TNT, and Verizon On Demand.
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A plan to trap Lucifer is at the center of this episode. It's titled "The Devil You Know."