Watch Arrow Season 5 Episode 21 online via TV Fanatic with over 6 options to watch the Arrow S5E21 full episode. Affiliates with free and paid streaming include iTunes, Vudu, Netflix, YouTube Purchase, Google Play, and Verizon On Demand.
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On Arrow Season 5 Episode 21, a crate is delivered containing a mysterious corpse encased in concrete when Oliver returns to the mayor's office.