Air Date : Mar 28 2016 | 838 Views
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Watch Supergirl season 1 episode 18 online. Supergirl meets the Flash. Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.
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