Watch Supergirl Season 3 Episode 18 - Shelter from the Storm

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Supergirl Season 3 Episode 18
When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J'onn look to Sam's mother (guest star Betty Buckley) for advice on how to stop Reign and come away with some shocking news.
First Aired: May 14, 2018 - 42 Minutes Runtime
Emma Tremblay, Betty Buckley
Season 3 Episode 18 - Video Clips & Extras