Watch Blue Bloods Season 4 Episode 20 online via TV Fanatic with over 7 options to watch the Blue Bloods S4E20 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, Hulu Plus, and Amazon Prime.
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Frank is unhappy when Erin is assigned the case of a cop accused of killing a suspect in his custody on Blue Bloods.