Supergirl Season 3 Episode 17

Supergirl Season 3 Episode 17

Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.



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Episode Title: Trinity

Air Date: 2018-05-07

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