The Flash (2014– )
11 user 10 critic

Don't Run 

Amunet kidnaps Caitlin and forces her to perform a tricky medical task and the Thinker traps the Flash in a speedster-proof prison.


Greg Berlanti (developed by), Andrew Kreisberg (developed by) | 5 more credits »

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Episode cast overview:
Grant Gustin ... Barry Allen / The Flash
Candice Patton ... Iris West-Allen
Danielle Panabaker ... Caitlin Snow
Carlos Valdes ... Cisco Ramon / Vibe
Neil Sandilands ... Clifford DeVoe / The Thinker
Tom Cavanagh ... Dr. Harry Wells
Jesse L. Martin ... Joe West
Katee Sackhoff ... Amunet Black / Blacksmith
Hartley Sawyer ... Ralph Dibny
Patrick Sabongui ... Captain David Singh
Kim Engelbrecht ... Marlize DeVoe / The Mechanic
Kendrick Sampson ... Dominic Lanse
Jessica Camacho ... Gypsy


Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin she needs her to perform a tricky medical task and if Caitlin fails, Amunet will kill her. Meanwhile, The Thinker traps The Flash in a speedster-proof prison. With the clock ticking, The Team doesn't have the time or resources to track both Caitlin and Barry so Iris is forced to choose who to save.

Plot Summary | Add Synopsis


TV-14 | See all certifications »




Release Date:

5 December 2017 (USA) See more »

Company Credits

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Technical Specs


Sound Mix:




Aspect Ratio:

16:9 HD
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Did You Know?


Cisco calls both Harry and Ralph humbugs, referencing Ebenezer Scrooge's catchphrase in the Charles Dickens novella A Christmas Carol. Cisco claims this as a "Festivus miracle", a phrase commonly used by Kramer in the TV series Seinfeld. See more »


Iris West-Allen: [listening to Cisco and Ralph bicker] What is wrong with those two?
Dr. Harry Wells: You.
Iris West-Allen: Excuse me?
Dr. Harry Wells: You know what's wrong. You're the team leader. Team leader's supposed to make the tough call.
Iris West-Allen: I made a call. I said we would look for both of them.
Dr. Harry Wells: No. Looking for both of them is not a choice. We're overtaxing our resources, our people, because you won't face the hard truth. And the hard truth is we can't look for both. We can only look for one.
Iris West-Allen: Harry, I just made a vow to love and protect Barry. To stand by him...
See more »


References Frosty the Snowman (1969) See more »

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User Reviews

Finally the dice has been rolled in bringing back the story!
19 December 2017 | by batbhaiSee all my reviews

S04E09 is Lesson of the Day: Don't Run! It now makes you really care about all the characters (except Amunet, who was so annoying from "Girl's Night Out" episode) especially The Thinker. He does seem to have a super brain! I like it when Barry Allen says to Iris "I don't have to run when I'm with you."

My ratings (based on what I marked on IMDb): Season 1: 200/23 = 8.69 Season 2: 193/23= 8.23; Season 3: 188/23= 8.17; and Season 4: 62/9= 6.89 (The first episode of this season which has been rated 9/10!) I will be missing one of the the best TV series for a month. See you flash fans on 16th January!

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