The Flash [Barry Allen]; Max Mercury; Flash [Jay Garrick]; Flash of China [Avery Ho]; Impulse [Bart Allen]; Kid Flash [Wallace West] (second Wally West, flashback); Iris West; Flash [Wally West] (also as Kid Flash in flashback); Calculator; Checkmate Knights; Steve Trevor (image on monitor); Rick Flag (image on monitor); Sasha Bordeaux (image on monitor); Captain Cold (flashback); King Snake; Slipknot; Mirror Master
Synopsis
In the future, Barry, Jay, Max, Avery, and Bart no longer have their speed powers, but they risk their lives to steal a device from Checkmate that Barry believes will help them cure Wally, who turned evil and remains a threat to the world.