The Flash (2014)/What's Past Is Prologue

What's Past Is Prologue
Season 5, Episode 8
Airdate	December 4, 2018
Production Number	T27.13758
Written by	Todd Helbing & Lauren Certo
Directed by	Tom Cavanaugh
Stream
← 5x07 O Come, All Ye Faithful	5x09 → Elseworlds (1)
The Flash — Season Five

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What's Past Is Prologue is the eighth episode of the fifth season of The Flash, and the one hundredth episode overall.

Starring: Grant Gustin (Barry Allen / The Flash), Candice Patton (Iris West-Allen), Danielle Panabaker (Dr. Caitlin Snow / Killer Frost), Carlos Valdes (Cisco Ramon / Vibe), Jessica Parker Kennedy (Nora West-Allen / XS), Chris Klein (Orlin Gibbons / Cicada)

with Tom Cavanagh (Sherloque Wells, Eobard Thawne, Dr. Harrison "Harry" Wells (Earth-2))

and Jesse L. Martin (Detective Joe West) (credit only)

Guest Starring: LaMonica Garrett (Mar Novu / The Monitor), Michelle Harrison (Nora Allen)

and John Wesley Shipp (Henry Allen, The Flash (Earth-90))

Guest Starring (end credits): Teddy Sears (Hunter Zolomon / Zoom)

Featuring: Tony Todd (The Voice of Zoom)

Co-Starring: Lossen Chambers (Doctor Ambres), Benita Ha (Paramedic #1), Islie Hirvonen (Grace Gibbons), Troy Rudolph (Paramedic #2)

Uncredited: Morena Baccarin (Gideon (voice))

Archive Footage: Robbie Amell (Ronnie Raymond), Victor Garber (Dr. Martin Stein), Neil Sandilands (Clifford DeVoe / The Thinker), Kim Engelbrecht (Marlize DeVoe)