Supergirl Season 1 Episode 18 – Worlds Finest

Air Date : Mar 28 2016 | 838 Views | 26 Link Submissions | 0 comment(s)

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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