Season Three

Trinity

Episode #: 317
U.S. Air Date: 05.07.18
Supergirl (317) - Trinity
Written By:
Caitlin Parrish & Derek Simon
Directed By:
Jessica Queller
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The D.E.O. team struggles with trust issues after discovering Lena's secret, and Supergirl leads a team into a realm where they hope to find Sam's suppressed consciousness -- setting up an epic battle against Reign and the Worldkillers. James considers whether or not he can break Lena's trust when Supergirl asks Guardian for a favor.
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News & Spoilers

SUPERGIRL TAKES ON ALL THREE WORLDKILLERS

Still reeling after learning about Lena's (Katie McGrath) secret, Supergirl (Melissa Benoist) asks Guardian (Mehcad Brooks) 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.

Caitlin Parrish & Erica Weiss directed the episode with story by Jessica Queller and teleplay by Caitlin Parrish & Derek Simon (#317).