Watch Blue Bloods Season 4 Episode 20 online via TV Fanatic with over 8 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, Amazon Prime, and CBS All Access.
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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.