Watch Supergirl Season 1 Episode 18
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Supergirl Season 1 Episode 18

Supergirl Season 1 Episode 18

Kara gains a new ally when the lightning-fast superhero The Flash 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.

Episode Name: Worlds Finest

Serie Name: Supergirl

Release: 2016-03-28

Country: United States

Quality: HD

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