Watch Hawaii Five-0 Season 4 Episode 21 online via TV Fanatic with over 7 options to watch the Hawaii Five-0 S4E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Netflix, YouTube Purchase, Google Play, and CBS All Access.
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McGarrett and Catherine travel to Afghanistan to help the family who saved Catherine's life years before on Hawaii Five-0.