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Supergirl – Season 3, Episode 17 Trinity

Play trailer 0:30 Supergirl – Season 3, Episode 17 Trinity Aired May 7, 2018 Drama Fantasy Action Play Trailer Watchlist
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82% Tomatometer 11 Reviews
Still reeling after learning Lena's secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever; with all three Worldkillers united, Supergirl and the team brace for an epic battle.
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Supergirl — Season 3, Episode 17

Supergirl — Season 3, Episode 17

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Critics Consensus

"Trinity" ties together themes and arcs that have been percolating throughout this Supergirl season, with detailed focus on character reaction and response.

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Critics Reviews

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Sara Netzley Entertainment Weekly 07/25/2018
B
Supergirl certainly struck gold with both the character of Sam, the tormented Worldkiller, and with Odette Annable, who plays her so beautifully. Go to Full Review
Caroline Siede AV Club 07/20/2018
B
The episode brings together a whole bunch of themes and plotlines that have been simmering throughout the season. Go to Full Review
Valerie Anne Autostraddle 07/20/2018
It was the best episode in a good long time and with the exception of a few things (some I'll pretend never happened and some I'll talk about) it was a really solid episode. Go to Full Review
Andy Swift TV Line 08/01/2018
Kara & Co.'s mission atop Monday's Supergirl was simple: Locate their enemy's base, defeat the Worldkillers and save Sam, all while overcoming an ally's perceived betrayal. Wait, sorry, did I say simple? Go to Full Review
Stacy Glanzman TV Fanatic 07/31/2018
4.8/5
Wow. That was ... unexpected. Go to Full Review
Caitlin Wyneken Tell-Tale TV 07/30/2018
4/5
People are likely to have a lot of feelings about how our characters react to Lena's attempts to help Sam. What really matters, though, is how effectively those reactions are handled, whatever they might be. Are they handled effectively? Well... mostly. Go to Full Review
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Episode Info

Synopsis Still reeling after learning Lena's secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever; with all three Worldkillers united, Supergirl and the team brace for an epic battle.
Director
Caitlin Parrish, Erica Weiss
Executive Producer
Greg Berlanti, Allison Adler, Andrew Kreisberg, Sarah Schechter
Screenwriter
Jessica Queller, Caitlin Parrish, Derek Simon
Network
CBS
Rating
TV-14 (V)
Genre
Drama, Fantasy, Action
Original Language
English
Release Date
May 7, 2018
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