The Flash (2014– )
9.3/10
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36 user 9 critic

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) | 8 more credits »
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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
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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.

Plot Summary | Add Synopsis


Certificate:

TV-PG | See all certifications »
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Details

Country:

USA

Language:

English

Release Date:

4 December 2018 (USA) See more »

Also Known As:

What's Past Is Prologue See more »

Filming Locations:

British Columbia, Canada See more »

Company Credits

Show more on IMDbPro »

Technical Specs

Runtime:

Sound Mix:

Stereo

Color:

Color

Aspect Ratio:

16:9 HD
See full technical specs »
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Did You Know?

Trivia

Third episode directed by Tom Cavanagh (Harrison Wells). See more »

Goofs

After Zoom kidnaps Caitlin, Cisco runs and calls out to her. In this episode, he is shown looking from behind a closed door, which wasn't closed during the events of "Versus Zoom". See more »

Quotes

Barry Allen: You think she should come with me?
Iris West-Allen: Yeah, Barry, I do.
Barry Allen: Iris, if I do this, I'm going back to some crazy times. Savitar, Zoom, Thawne. Speedsters...
Iris West-Allen: Who you've all outsmarted and defeated. Look, this was her idea, Barry. Her solution. And it's a good one. So unless you have a better reason why she should stay back, let her do this.
See more »

Soundtracks

Back in Time
(uncredited)
Performed by Huey Lewis & The News
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User Reviews

 
Redemption, finally - The best episode of Season 5
6 December 2018 | by asb_deutschSee all my reviews

2018 hasn't been the best of years for the Flash. Viewership has declined and so did my ratings. 😅 What else can be better and bigger than this episode? Else wait for ElseWorlds but I still feel so overwhelmed that I viewed it twice as I have learnt new terms like hack-time! The Once and future Flash was also directed by Cavanagh. He is not only a wonderful actor but one of the best TV directors. If anybody deserves a seat in the director's seat, it's Tom Cavanagh for TV just like Nolan for movies. He finally removed the soap opera drama and fused the entities of previous seasons. The optimistic, pessimistic, and pensive tunes fall at the right places. I wish WB would hire him more often as he understands drama 10x better than other directors. Plus that twist turn at the end....wow!


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