I Know Who You Are

"I know who you are."
"It's about time."

"Yes, it is. Everything with you is about time, isn't it? The past, the present, the future. You know all of it, right? And you know everything about me! About Joe! About Wally! And Iris! You know our strengths. You know our fears. You know how much we love each other, and you know how to use that love against us. All this time, we thought that we couldn't stop you because you were one step ahead, but that's not it! You don't just know what's gonna happen to us. You were there, you lived it, you remember... when you were me."
"Like I told you from the beginning... I am the Future Flash."

—Barry and Savitar

"I Know Who You Are"
Information
Season 3 » Episode 20
Episode number	66 of 184
Original airdate	May 2, 2017
Written by	Bronwen Clark Joshua V. Gilbert
Directed by	Hanelle M. Culpepper
Chronology
Preceded by	"The Once and Future Flash"
Followed by	"Cause and Effect"
Blog post	Post 57

"I Know Who You Are" is the twentieth episode of the third season of The Flash, and the sixty-sixth episode overall. It aired on May 2, 2017.

Synopsis

Barry and the team meet Tracy Brand, a scientist, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy so Team Flash must battle their old friend, which proves to be particularly difficult for Cisco. Joe and Cecille’s relationship takes a big turn.[src]

Cast

Starring

• Grant Gustin as Barry Allen/The Flash/Savitar
• Candice Patton as Iris West
• Danielle Panabaker as Killer Frost
• Carlos Valdes as Cisco Ramon/Vibe
• Keiynan Lonsdale as Wally West
• Tom Cavanagh as H.R. Wells
• Jesse L. Martin as Detective Joe West

Special appearance by

• Tom Felton as Julian Albert

Guest starring

• Anne Dudek as Tracy Brand
• Danielle Nicolet as Cecile Horton
• Andre Tricoteux as Savitar

Uncredited

• Tobin Bell as Savitar (voice)

Trivia

• H.R. refers to Julian as "Romeo and Juliet" after he expresses concern over Caitlin. This is a reference to the tragedy by William Shakespeare.
• Dr. Hersch is mentioned to be a faculty member at Central City University. In the comics, David Hersch is the civilian identity of Cicada, an enemy of The Flash and cult leader.
  • Cicada would become the main antagonist in the fifth season.
• Tracy likens herself to Sarah Connor from the 1984 film The Terminator. Cisco and H.R. disagree, comparing her instead to Miles Dyson.
• Tracy refers to Killer Frost as "Jack Frost's sister" and "the White Witch" which is likely a reference to the villainess from the Chronicles of Narnia series.
• Tracy's favorite drink at Jitters is a secret item called "Zoom."

Goofs

• At CCU, after Cisco takes the lighter from Tracy, she removes her wielding helmet. However, in the next shot, Tracy is still wearing the helmet and takes it off after a couple seconds.

Gallery

Videos

The Flash 3x20 Promo "I Know Who You Are" (HD) Season 3 Episode 20 Promo

Promo

The Flash I Know Who You Are Trailer The CW

Extended promo

The Flash I Know Who You Are Scene The CW

The Flash Inside The Flash I Know Who You Are The CW