Watch South Park Season 15 Episode 13 online via TV Fanatic with over 8 options to watch the South Park S15E13 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Hulu Plus, Hulu, and South Park Studios.
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The South Park kids watch a History Channel Thanksgiving and believe that aliens were involved in this holiday. Well, at least Cartman seems to buy it.