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"Marathon" is the tenth and midseason premiere episode of the sixth season of The Flash, and the one-hundred-twenty-fourth episode overall. It aired on February 4, 2020.

Life is a marathon, not a sprint, Barry. Slow down and enjoy it.
— John Diggle to Barry Allen
(Source: "Marathon"


After The Citizen prints an explosive story, Iris's life is threatened. Refusing to hide from those that are attacking her, Iris sets out to expose a dangerous organization. Meanwhile, Barry must face the consequences of the Crisis and fulfil Oliver Queen's wish for him.



Main/Featured Characters[edit]


Who's Who Binder[edit]
The following characters was pictured and named in the episode. Unless specified, they were not mentioned nor appear in the episode.

Other Characters[edit]

Pre-Crisis characters[edit]






  • Doctor Light made her first live action debut in this episode.
  • This episode reveals more of Nash's backstory.
  • On the board of the world map, we can see multiple location fron the DC Comics.:
  • Happy Harbor (the base of operations of the Justice League in the comics before the Watchtower)
  • Santa Prisca (a prison known for hosting Bane a Batman villain)



The Flash Season 6

"Into the Void" "A Flash of the Lightning" "Dead Man Running" "There Will Be Blood" "Kiss Kiss Breach Breach" "License to Elongate" "The Last Temptation of Barry Allen, Pt. 1" "The Last Temptation of Barry Allen, Pt. 2" "Crisis on Infinite Earths: Part Three" "Marathon" "Love Is A Battlefield" "A Girl Named Sue" "Grodd Friended Me" "Death of the Speed Force" "The Exorcism of Nash Wells" "So Long and Goodnight" "Liberation" "Pay the Piper" "Success Is Assured"

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