Watch Supernatural Season 4 Episode 20 online via TV Fanatic with over 7 options to watch the Supernatural S4E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Netflix, YouTube Purchase, Google Play, and Verizon On Demand.
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Castiel appears to Dean in a dream and tells him he has something to say to him in private. Dan and Sam go searching for Castiel, but find Jimmy, Castiel's human vessel, instead.