- "We can't punish ourselves for the mistakes we've made. That's a closed door. But we can take responsibility for our actions no matter how great the obstacle to overcome."
- —Wally inspiring Barry after the death of the Speed Force
|Kid Flash returns to Central City with a Zen attitude and new tricks up his sleeve. While thrilled to see his family again, Wally confides to Barry that he returned because he thinks there is something wrong with the Speed Force. Meanwhile, Cisco returns from his fact-finding mission across Earth-Prime.|
A helicopter starts to rust and drop out of the sky over Central City, yet a speedster races to the scene and recoveries the traveler before destroying the airplane, making all the difference. It's not Barry. It's Kid Flash, otherwise known as Wally West. He's back with another feeling of zen and some new powers, as well. Cisco likewise comes back from investigating the world, his last quit having been Atlantis. After the festival, Barry and Wally speed tidy up and he has an issue with his speed and Wally uncovers that he's truly returned in light of the fact that some kind of problem with's the Speed Force.
Wally stands up to Barry about the Speed Force issue and carries him into the Speed Force where they discover her - the portrayal of Nora Allen - and she's perishing. She discloses to him it's his activities that is murdering her. Without Wally helping him, Barry enters the Speed Force once more, alone. Speed Nora clarifies that it wasn't the fight with Bloodwork. It was when Barry had the Specter send him to the Speed Force that caused this calamity. Speed Nora discloses to him she adores him and passes on.
Cisco doesn't feel like his outing far and wide transformed him in any case and that he's simply back where he began from, which provoked him to be impolite and contemptuous of Nash when he came to him for help with his abnormal "dreams." Cisco later goes to see Nash, yet is controlled by Reverse Flash now, however he doesn't have speed or powers, yet Cecile brings Reverse Flash Nash down and they detain him in the Pipeline. Invert Flash realizes that the Speed Force is dead and he needs to utilize that loss of capacity to murder Barry and everybody he adores.
With respect to the antagonist of the week, at Jitters, Maria Volkova - the lady from the helicopter - is assaulted by a secretive meta and executed, actually transformed into a matured mummy. The meta reprobate is Turtle 2, otherwise known as Frida Novakov. She's the explanation Cisco came back to Central City as he's been catching wind of her in the entirety of his movements. She later assaults the CCPD, however Wally and Barry best use their residual forces to stop her by means of remedy Cisco makes.
The scene closes with two pivotal turning points. The first is that, with the Speed Force dead, Barry chooses to work with Caitlin and Cisco to manufacture a fake Speed Force and reestablish his speed. The second is that Kamila has made sense of Mirror Iris isn't right gratitude to a photograph she took, yet before Kamila can do anything, Mirror Iris fires her with the Mirror Gun.
- Grant Gustin as Barry Allen/The Flash
- Candice Patton as Iris West-Allen and "Iris West-Allen"
- Danielle Panabaker as Dr. Caitlin Snow
- Carlos Valdes as Cisco Ramon
- Hartley Sawyer (credit only)
- Danielle Nicolet as Defense Attorney Cecile Horton
- Efrat Dor as Dr. Eva McCulloch
- Tom Cavanagh as Dr. Nash Wells and Professor Eobard Thawne
- Jesse L. Martin as Captain Joe West
Special guest star
- Tess Atkins as Natalie
- Stephanie Izsak as Officer Daisy Korber
- Elizaveta Neretin as Maria Volkova
- Sasha Piltsin as Bodyguard
- Andre Roshkov as Pilot
- Vanessa Walsh as Frida Novikov/Turtle-2
- Cisco mentions that by the events of the episode, all doppelgängers from the old multiverse who ended up on Earth-Prime are supposed to be dead because of cellular degeneration. This was previously shown in the episode "" with Beth Kane of Earth-Prime and Beth Kane of Earth-TUD14.
- The episode shares its title with an arc from the DC Rebirth Flash comics.
- This episode was originally scheduled for March 3, 2020, but was later confirmed to air on March 10th, 2020. This could be due to the Super Tuesday elections. Instead, a rerun of "" aired on March 3.
- In the episode, clips of previous episodes are shown. Oliver Queen/Spectre, Supergirl, J'onn J'onzz, Kate Kane/Batwoman, Lex Luthor and John Diggle appear via archival footage as a result of these episodes:
- This is Wally West's first appearance since "" and his first appearance in the present since "".
- This is also Wally's only appearance in Season 6.
- When Eobard Thawne tells Cisco that he doesn’t need powers to kill him, it’s almost identical to when he said the same thing to Ray Palmer during their fight on the moon in the episode, "".
- The building Wally and Barry phased through when running to CCPD is identical to the one Wally could not phase through in "".
- The scene in which Barry is mourning the death of the speed force in the time vault is actually very similar in tone to when future Barry mourned Iris in the season 3 episode "", with the only difference being that someone was there to consult him way earlier whereas the other Barry Allen mourning Iris, has been that way for a while.
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