"You ruined my life! All of our lives!"
Barry Allen to Eobard Thawne/The Reverse-Flash
"The Trap" is the twentieth episode of the first season of The Flash, and the twentieth episode overall. It aired on April 28, 2015.


Barry, Caitlin, Cisco and Joe set a trap for Wells. Cisco uses himself as prey which puts him in grave danger. Meanwhile, Eddie makes a decision regarding Iris, which leaves Joe a bit unsettled.[1]


Preparation ran from February 13 until February 23, 2015. Shooting ran from February 24 until March 6, 2015.[2]


  • Gideon reveals that at some point in the future, Barry created her and will get promoted to the director of the Central City Police Department's CSI division.
  • Gideon mentions to Barry that he is "a founding member of ...", but is interrupted by the latter (before she can finish her sentence) who wants to know what she is, however, in a comic preview of the same scene, Gideon is interrupted after stating the word "justice". It is implied that he is a founding member of the Justice League or a future incarnation of the Justice Society.[3]
  • Cisco calls Gideon "Hal", a reference to HAL 9000 from the 1968 film 2001: A Space Odyssey.
  • Before entering his lucid dream, Cisco asks if it was like the 2010 film Inception or the 1984 film Dreamscape
  • This was the last episode that Gideon appeared in the present chronologically, until the Season 4 episode, "Null and Annoyed".


  • In the future Central City Citizen newspaper, the present-day Star City is referred to by its old name, Starling City, a possible oversight by the producers.
    • This might also be somehow related to changes in the timeline and, maybe due to a butterfly effect (caused by Eobard Thawne's time travel), the city had its name changed back to Starling City.
  • In the flashback, as Thawne/Wells talks to an unconscious Barry, he is shown vibrating his hand, even though he had lost his powers at that point.




  1. Flash Episode 20 "The Trap" Description - FlashTVNews
  2. Andrew Kresiberg (@AJKreisberg) - Twitter
  3. Flash, Gideon. Gideon, Flash.- Twitter

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