Watch Elementary Season 2 Episode 21 online via TV Fanatic with over 6 options to watch the Elementary S2E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Hulu Plus.
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A missing person case sends Sherlock and Joan into the world of unmanned aeronautics and Sherlock's brother Mycroft makes an unexpected return on Elementary.