“Supergirl” – S03E17 “Trinity” Behind-the-Scenes and Preview Clip

The CW has released a preview clip and behind-the-scenes video for the 17th episode of Season 3 of “Supergirl”.

Titled “Trinity”, this episode is scheduled to air on The CW in the USA on Monday, May 7 at 8.00pm ET/PT.

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.

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