The Flash

I Know Who You Are (Season 3, Episode 20)

TV-PG

TV Episode | 42 min | Action, Adventure, Drama

Team Flash meets a scientist who may be the key to stopping Savitar, but is forced into a battle with Killer Frost.

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Cast	+ Add Cast
12 cast members

Name	Known for
Grant Gustin Barry Allen / The Flash / Savitar Barry Allen / The Flash / Savitar See fewer	The Flash (2014)
Candice Patton Iris West Iris West See fewer	The Flash (2014)
Danielle Panabaker Killer Frost Killer Frost See fewer	The Flash (2014)
Carlos Valdes Cisco Ramon / Vibe Cisco Ramon / Vibe See fewer	The Flash (2014)
Keiynan Lonsdale Wally West Wally West See fewer	The Flash (2014)
Tom Cavanagh H.R. Wells H.R. Wells See fewer	Ed (2000)
Jesse L. Martin Joe West Joe West See fewer	Rent (2005)
Tom Felton Julian Albert Julian Albert See fewer	Harry Potter and the Half-Blood Prince (2009)
Anne Dudek Tracy Brand Tracy Brand See fewer	Corporate (2018)
Danielle Nicolet Cecile Horton Cecile Horton See fewer	Central Intelligence (2016)
Andre Tricoteux Savitar Savitar See fewer	Deadpool 2 (2018)
Tobin Bell Savitar (voice) (uncredited) Savitar (voice) (uncredited) See fewer	Saw (2004)