"Well, I'm sorry, Jay. If this is the only way to save everyone in the city, I have to."
Barry Allen to Jay Garrick
"Enter Flashtime" is the fifteenth episode of the fourth season of The Flash, and the eighty-fourth episode overall. It aired on March 6, 2018.


When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. As everyone in the city is frozen, the three speedsters push themselves to the breaking point to save the city and everyone in it.[src]


  • Cisco refers to Barry as "Miyagi", referencing the character from The Karate Kid franchise.
  • Cisco refers to the nuclear bomb as their "Ark of the Covenant", referring to the legendary object's depiction in the 1981 film Raiders of the Lost Ark, from which a pillar of holy fire rises and shoots oncoming soldiers.
  • Barry calls Iris his "lightning rod". This is a reference to the concept introduced in The Flash: Rebirth; a speedster's "lightning rod" is his or her loved one who can help him or her escape the Speed Force and return to a certain point in time.
  • The group responsible for attempting to set off the nuclear detonation is identified in a video message as the "Eden Corps", with their leader being Veronica Dale. In the New Earth comics, Dale was one of the leaders of the Eden Corps, a terrorist organization that was indirectly responsible for Oliver Queen's death.
  • The concept of "Flashtime" was created for the series.
  • In an interview, John Wesley Shipp stated that the studio hired over 100 mimes to help with the "Flashtime" scenes, where the extras were to remain frozen in time. In those scenes however, CGI wasn't an option due to all of the interaction between moving and frozen people in the episode.[citation needed]
  • The equation written on the board in the Speed lab at the beginning of the episode, 3x2(9yz)4A, is the speed equation that Barry created to increase his speed in order to defeat Zoom, which he went back in time to get help for in "Flash Back".
    • In the comics, the same formula was also used by Johnny Quick to create his speed.


  • When Barry is in "Flashtime", he is using a pen to write on a glass screen. However, the pen's ink would simply not flow fast enough to allow him to use it. Furthermore, Barry drops the pen and it appears to fall at normal speed, instead of appearing to fall in slow motion as one would expect. Even if the pen had been brought into the Flashtime state to allow him to use it (though no suggestion is ever made that Barry can do this with inanimate objects), the pen would have still fallen at the rate determined by gravitational pull (9.81 m/s^2).
    • From the time the button was pressed until the bomb went off would have been less than 5 nanoseconds. Barry made the one-way trip between S.T.A.R. Labs and the hangar 4 times, so he would have to travel at nearly 5000 times the speed of light to accomplish this feat, even if the two facilities were next door to each other.




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