Supergirl

Season 3 Episode 18

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Shelter From the Storm

When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J'onn look to Sam’s mother for advice on how to stop Reign and come away with some shocking news. The crossover continues on The Flash S03E08 Invasion! (II), Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).

Season: 3
Episode: 18
Air Time: 9:00 PM EST
Buy or Stream: Amazon
Air Date: 2018-05-14
Air On: CW