Watch Arrow Season 4 Episode 12 online via TV Fanatic with over 6 options to watch the Arrow S4E12 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, YouTube Purchase, Google Play, and Verizon On Demand.
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On Arrow Season 4 Episode 12, two favorites return to Star City as Nyssa makes her move and Roy Harper is back in town. Oh, and the Calculator pays a visit, too.