The Negative Speed Force tries to seduce a very confused Eddie Thawne, all while Team Flash tries to get Barry back from the future.
Tropes
- Accidental Murder: Eddie's emotions running wild at the cemetery causes a singularity to open up and suck Future-Korber in.
- The Ageless: Allegra, Chester and Cecile don't look a day older in 2049 than they do in 2023 (presumably due to being metas). Lampshaded when present-day Cecile, projecting into her future self's body, sees her reflection in a mirror.Cecile: Daaaaang! Looking good, future me!
- Big Damn Heroes: Cecile saves Barry from the Negative Speed Force, freeing Nora from it.
- Call-Back: To Nora and Bart meeting Eddie when they travelled to 2013.
- Comic-Book Movies Don't Use Codenames: Finally averted with Cecile in the future, where she wears a full-blown costume and goes by the alias of "Virtue", making her a Composite Character with Holly Ann Fields from the comics.
- Continuity Nod: A blink-and-you'll-miss-it view of the team's idea board mentions failed attempts to contact Professor Stone and Timeless Wells.
- The Corrupter: The Negative Speed Force preys on Eddie's insecurities to eventually turn him into its avatar.
- Demonic Possession: The Negative Speed Force possesses Future Nora. Cecile eventually pushes it out of her.
- The End of the World as We Know It: Speed Force Nora warns Team Flash that, if Barry dies and the Speed Force is extinguished, then the timeline and everything in it will be erased forever.
- "Eureka!" Moment: Chester remembers that Cecile has been able to feel Barry when he went into the past, and she can also project her consciousness, so logically she should be able to project herself into her future self.
- Face–Heel Turn: Eddie, upon encountering Nora, being reminded about the descendants he was supposed to have, and Future-Iris rejecting him (all with the nudging of the N.S.F.), feels angry and betrayed enough that the Negative Speed Force is able to convince him to become its avatar so he can take it all back.
- From Bad to Worse: The Negative Forces' attack on the Speed Force succeeded, leaving only the Flash Family as the source of the Positive Speed Force's energy, just in time for Eddie become the N.S.F.'s new avatar and travel back to the present day.
- Happily Married: In the future, Allegra and Chester have been married for an unspecified but large number of years.
- In the Back: A possessed Nora does this to Barry when the latter hugs her.
- Meanwhile, in the Future…: The Negative Speed Force's attacks are described as happening simultaneously across time to explain why the 2049 versions of Team Flash don't remember being attacked in 2023.
- Mental Time Travel: Cecile mentally projects into her 2049 self to assist Barry when they learn he's there from Speed Force Nora.
- Morton's Fork: Negative-Speed-Force-possessed Nora lampshades that neither Barry dying nor Barry killing Nora works in his favor—he loses either way. It's only because of Eddie distracting it does Barry get away.
- Noodle Incident: Apparently, there will be something called the Chronarch Wars and a Savothian freedom fight in the future.
- Not Good with Rejection: Iris rejecting Eddie is what finally drives him over the edge.
- Shout-Out: Possibly to the Ancient One in Doctor Strange (2016) (and other movies): Cecile does a very similar palm strike, with a similar "ghost" effect, to force the Negative Speed Force out of Nora.
- This Cannot Be!: Eddie freaks out when he learns Eobard kept returning even after his sacrifice, thus rendering it meaningless.
- Time Crash: The Negative Speed Force's simultaneous attacks on 2000, 2023 and 2049 cause damage to the timeline itself that manifests as red lightning.
- When You Coming Home, Dad?: Cecile is horrified to learn that, in the future, she is so busy with her superhero stuff that she only visits Joe and Jenna around twice a year.
- You Are Better Than You Think You Are: Chester manages to convince Cecile to overcome her fear of neglecting her family and focus on her true superpower - her heart and dedication to the people she loves.
