Watch South Park Season 21 Episode 4 online via TV Fanatic with over 6 options to watch the South Park S21E4 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.
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On South Park Season 21 Episode 4, Mark Zuckerberg steps up in order to assist the boys in their attempt to put a stop to the spread of fake news.