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Quote1 Sorry you ran all this way for nothing. You want some advice? Go home. Spend as much time with Iris as you can. Because pretty soon, we'll never see her again. Quote2
Barry Allen (Future)

The Once and Future Flash is an episode of season 3 of The Flash. It premiered on April 25, 2017.

Synopsis for "The Once and Future Flash"

Appearing in "The Once and Future Flash"

Featured Characters:

Supporting Characters:


  • Killer Frost (Caitlin Snow)
  • Killer Frost/Caitlin Snow (Future) (First full appearance) (Flashback and main story)
  • Mirror Master/Sam Scudder (Future) (Single appearance)
  • Savitar (Cameo)
  • The Top/Rosa Dillon (Future) (Single appearance)

Other Characters:



  • H.R. Wells' Drumsticks
  • Meta-Cuffs
  • Savitar's Armor
  • Speed Force Bazooka (Mentioned only)
  • Vibe's Goggles (Flashback only) (Cameo)



  • This episode is mainly set on Savitar's Future where his Paradox began in the Post-Flashpoint continuity. By 2024, the following events have occurred:
    • Savitar killed Iris West which was originally shown in "The Present";
    • An enraged Wally West attacked Savitar by himself but the God of Speed overpowered him and broke his spine, leaving him catatonic after revealing his true identity;
    • Cisco Ramon lost his hands as well as his vibing abilities during the battle against Killer Frost that was originally glimpsed in "Shade"; he eventually replaced his hands with robotic ones.
    • Team Flash disbanded and S.T.A.R. Labs was left abandoned;
    • Killer Frost was captured and imprisoned in Iron Heights by Julian Albert;
    • H.R. Wells has become a successful author and owner of Jitters which he renamed as H.R. Jitters.
    • In 2021, Savitar was eventually defeated by The Flash and imprisoned in the Speed Force thanks to Tracy Brand's Speed Force Bazooka; Barry then retired to the abandoned S.T.A.R. Labs;
    • Some time after Barry's retirement in the S.T.A.R. Labs, the Flash Villains, including Top and Mirror Master, resurfaced without anyone opposing them.
  • The events of this future are eventually averted on Earth-1 due to the interference of H.R. Wells who will sacrifice himself to save Iris from Savitar.[1]


  • "Post 56 #WhoIsSavitar?" is The Chronicles of Cisco post regarding this episode.[2]

See Also

Recommended Media

  • None.

Links and References

  • None.