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The Flash – Season 3, Episode 20 I Know Who You Are

Play trailer The Flash – Season 3, Episode 20 I Know Who You Are Aired May 2, 2017 Drama Action Adventure Fantasy Play Trailer Watchlist
Watchlist Tomatometer Popcornmeter
73% Tomatometer 11 Reviews
Barry and the team meet Tracy Brand, a scientist who may be the key to stopping Savitar; Joe and Cecile's relationship takes a big turn.
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The Flash — Season 3, Episode 20

The Flash — Season 3, Episode 20

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Critics Consensus

Just like Savitar, "I Know Who You Are" is dark, mysterious, and full of shocking twists -- even if the episode's big reveal feels a tad dragged-out.

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Cast & Crew

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Grant Gustin

Barry Allen

Candice Patton

Iris West

Danielle Panabaker

Caitlin Snow

Carlos Valdes

Cisco Ramon

Tom Cavanagh

Dr. Harrison Wells

Jesse L. Martin

Detective Joe West
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The Flash — Season 3, Episode 20

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Critics Reviews

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Angelica Jade Bastién New York Magazine/Vulture 08/02/2018
3/5
Danielle Panabaker has never been more thrilling than when she plays Killer Frost. Go to Full Review Chancellor Agard Entertainment Weekly 07/26/2018
B+
It's powerful, poignant, and dark, but unlike previous episodes, it earns that darkness and doesn't wallow in it. Go to Full Review Scott Von Doviak AV Club 07/25/2018
C
It plays out as unjustified self-congratulation for dragging out the big mystery for much longer than necessary. Go to Full Review Noetta Harjo Geek Girl Authority 04/22/2020
Did they create Tracy to complement HR? It's so funny to watch these two together. They're like...the same person! Except Tracy is an actual genius and HR pretends to be one. They are really cute together! Go to Full Review Ja-Quan Greene Black Nerd Problems 08/02/2018
An amazing blend of CGI and camerawork that produced sheer greatness. Go to Full Review Jesse Schedeen IGN Movies 08/02/2018
6.8
This week's Flash was a very mixed affair... There was too much filler leading up to the big Savitar reveal, but at least that reveal promises to re-energize the series. Go to Full Review Read all reviews

Episode Info

Synopsis Barry and the team meet Tracy Brand, a scientist who may be the key to stopping Savitar; Joe and Cecile's relationship takes a big turn.
Director
Hanelle M. Culpepper
Executive Producer
Greg Berlanti, Andrew Kreisberg, David Nutter, Sarah Schechter
Screenwriter
Bronwen Clark, Joshua V. Gilbert
Network
The CW
Rating
TV-PG (V)
Genre
Drama, Action, Adventure, Fantasy
Original Language
English
Release Date
May 2, 2017