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"Thawne, what did you do?
You're not The Flash, Allen. I am.
Barry Allen and Eobard Thawne

"Armageddon, Part 4" is the fourth episode of the eighth season of The Flash, and the one-hundred-fifty-fifth episode overall. It aired on December 7, 2021. The episode is the fourth part of the five-part crossover, Armageddon.



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  • The following events occurred in the Reverse-Flashpoint caused by Eobard Thawne:
  • The Reverse-Flash has a new suit that is much closer of a match to Barry's current suit.
  • The Reverse-Flash suit coming out of the Flash ring is a reference to the Flashpoint comics.
  • This is Damien Darhk's first appearance on The Flash since "Legends of Today".
  • Damien Darhk's magic not working on both Frost and Mark Blaine thanks to John Constantine before he fight them with hand-to-hand combat is very similar to what happened with him during his final battle with Oliver Queen in "Schism" when his magic couldn't work on him thanks to a magical tattoo that Oliver got from Constantine.
  • Batwoman mentions a dealing with a "lady [speedster] in red". While this seems to imply a version of Red Death as he was a villain to both Batman and Flash, Ryan also could be referring to Trajectory or Jesse Quick.
  • This is the first time in the Arrowverse that Barry and Darhk have interacted.
  • To match with Thawne's changing of the timeline, the title sequence uses footage of him as the Flash, as opposed to the normal usage of Barry Allen.


  • The scene at the beginning of the episode in which Eobard gives his speech and Barry arrives has some minor differences compared to the scene as it was shown at the end of the previous episode, "Armageddon, Part 3".
    • This is the second episode in which one of Eobard's speeches from a previous episode has had minor differences when recreated, the first being "Therefore I Am", which recreated the press conference scene from "Pilot".
  • Deon Owens mentioned that Eobard used the Negative Still Force to kill Joe but while Eobard was explaining how he killed Joe to Barry, the flashback of him show him running at superspeed pushing Joe on the train tracks. It's either Deon made a mistake to believe that Eobard uses the Negative Still Force in which Deon who usually uses the Still Force picked up negative tachyons in which he believed that Eobard uses the Negative Still Force to kill Joe or Eobard actually gained access to the Negative Still Force during Joe's death even though the flashback shows Eobard using his superspeed.