The Flash (2014– )
14 user 11 critic

The Once and Future Flash 

Barry travels forward in time to 2024 to find out Savitar's identity and save Iris' life.


Tom Cavanagh


Greg Berlanti (developed by), Andrew Kreisberg (developed by) | 4 more credits »




Episode complete credited cast:
Grant Gustin ... Barry Allen / The Flash
Candice Patton ... Iris West
Danielle Panabaker ... Killer Frost
Carlos Valdes ... Cisco Ramon / Vibe
Keiynan Lonsdale ... Wally West / Kid Flash
Tom Cavanagh ... H.R. Wells
Jesse L. Martin ... Joe West
Tom Felton ... Julian Albert
Grey Damon ... Sam Scudder / Mirror Master
Ashley Rickards ... Rosalind Dillon / Top
Andre Tricoteux ... Savitar
Makara Adkins Makara Adkins ... Another Woman
Kathryn Coutu Kathryn Coutu ... Woman
Jonathan Glasgow Jonathan Glasgow ... Newscaster Kline
Carmela Sison ... Nurse Beth


Barry travels to the future to find out Savitar's still unknown identity in the hopes of saving Iris. Upon his arrival in 2024, Barry encounters future versions of his Team Flash friends, who, folllowing the death of Iris, have become very different people, profoundly impacted by their showdown with Savitar. It will be up to Barry to infuse a sense of hope back into the team, as he proves to be the hero his future friends have been waiting for. Meanwhile, back in 2017, the hunt for Killer Frost continues.

Plot Summary | Add Synopsis


TV-PG | See all certifications »

Did You Know?


Three of the actors in this episode were born within the space of five days in September 1987: Danielle Panabaker (Caitlin Snow / Killer Frost) on September 19, Tom Felton (Julian Albert) on September 22 and Grey Damon (Sam Scudder / Mirror Master) on September 24. See more »


When Barry is in 2024, he refers to himself as being from 2017, but when he gets home and HR asks when he went to, he says eight years into the future. See more »


Barry Allen: How did you know I was here?
Cisco Ramon: I had a feeling. A feeling I have not felt in a long time. And so I hacked into the security cameras, and I saw you fighting Top and Mirror Master in your O.G. suit with the white emblem - 2017 edition, of course.
See more »


References Back to the Future (1985) See more »


The Flash Theme
Written by Blake Neely
See more »

User Reviews

An over Exaggerated Future
8 March 2018 | by user-651-726996See all my reviews

My first review for any of the Flash episodes. Everything is over exaggerated in the future of flash. Everything is sad on purpose. It is common sense that this won't be the future no matter how much they show us and force us that this is it.

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Release Date:

25 April 2017 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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