Watch Once Upon a Time Season 5 Episode 21 online via TV Fanatic with over 7 options to watch the Once Upon a Time S5E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Netflix, YouTube Purchase, Google Play, and Verizon On Demand.
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On Once Upon a Time Season 5 Episode 21, as the heroes go up against Hades in Storybrooke, the epic showdown ends with one person gone forever.