What's Past Is Prologue 

Barry and Team Flash come up with a plan to stop Cicada. However, the plan calls for Barry and Nora to travel back in time to gather some key necessities. Meanwhile, Sherloque's suspicions ... See full summary »

Director:

Tom Cavanagh

Writers:

Greg Berlanti (developed by), Andrew Kreisberg (developed by)

Stars:

Grant Gustin, Candice Patton, Danielle Panabaker

Cast

Episode cast overview, first billed only:
Grant Gustin	...	Barry Allen / The Flash
Candice Patton	...	Iris West-Allen
Danielle Panabaker	...	Caitlin Snow / Killer Frost
Carlos Valdes	...	Cisco Ramon / Vibe
Hartley Sawyer	...	Ralph Dibny / Elongated Man
Jessica Parker Kennedy	...	Nora West-Allen / XS
Chris Klein	...	Orlin Dwyer / Cicada
Tom Cavanagh	...	Sherloque Wells / Dr. Harry Wells / Dr. Harrison Wells / Eobard Thawne
Jesse L. Martin	...	Joe West (archive footage) (credit only)
LaMonica Garrett	...	Mar Novu / The Monitor
Michelle Harrison	...	Nora Allen
John Wesley Shipp	...	Henry Allen / The Flash
Teddy Sears	...	Hunter Zolomon / Zoom
Tony Todd	...	Zoom (voice)
Lossen Chambers	...	Dr. Vanessa Ambres

Storyline

Barry and Team Flash come up with a plan to stop Cicada. However, the plan calls for Barry and Nora to travel back in time to gather some key necessities. Meanwhile, Sherloque's suspicions about Nora continue to grow.

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Plot Keywords:

directed by cast member | time travel | reference to a tale of two cities the novel | reference to neil armstrong | dagger | 

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Genres:

Action | Adventure | Drama | Sci-Fi

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Did You Know?

Trivia

At one point, Gideon was about to say that Nora is the fifth recruit of the Legion of something, before Barry interrupted her. This is a reference to the Subject episode The Trap (2015), when Gideon was about to say that Barry is the founder of something before he interrupted her.

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Goofs

When Barry and Nora travel back to the events of "Versus Zoom", Iris checked on Barry after Zoom stole his speed. However, in the original episode, Iris checked on him before that happened.

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Quotes

Barry Allen: [finding Zoom's transmitter isn't where it should be] Come on...
[hearing a plasma gun charge, he turns to find Harry behind him]
Dr. Harry Wells: Well, you change quickly.
Barry Allen: What?
Dr. Harry Wells: Out of your suit.
Barry Allen: [playing along] Yeah, no, I... yeah, it was... just too weird being in it without my speed.
Dr. Harry Wells: That's your own damn fault, isn't it?
Barry Allen: I guess so.
Dr. Harry Wells: I know so.

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Connections

Edited from The Flash: Finish Line (2017)

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Soundtracks

Back in Time
(uncredited)
Performed by Huey Lewis & The News
Additional Production & Remix by Jellybean Benítez

User Reviews

One episode combined with the best that flash can offer.

A classic flash episode which has twists and turns every minute. Coupled up with great acting from Jessica P. Kennedy and Grant gustin and of course the great Tom Cavanaugh and good directing this episode is one of the best the Flash can offer. I bet any flash fan will enjoy every minute of it.

Please! If you were stopped watching after s4 please give this episode a chance. It won't dissapoint. 10/10

Details

Country:

USA

Language:

English

Release Date:

4 December 2018 (USA)

Filming Locations:

British Columbia, Canada

Company Credits

Production Co:

Berlanti Productions, DC Entertainment, Warner Bros. Television

Technical Specs

Runtime:

42 min

Sound Mix:

Stereo

Color:

Color

Aspect Ratio:

16:9 HD