Complete story — includes the ending
Oliver, Barry Allen, and Kara Danvers head to Gotham City to find John Deegan, but are quickly arrested. However, they are bailed out by Kate Kane, who tells them Deegan can be found at Arkham Asylum. With some assistance from Oliver and Barry's teams, they break in to confront Deegan and retrieve the book he used to rewrite reality, only for the doctor to escape by causing a mass breakout. While trying to contain it, Batwoman shows up to help them before telling them to leave Gotham. Returning to A.R.G.U.S., the heroes attempt to unlock the book when the Flash of Earth-90 breaches through to them and warns them of the Monitor. Oliver, Barry, Kara, and Earth-90's Flash go to confront the Monitor, but the omnipotent being escapes and returns the book to Deegan, who changes reality once more. This time, Oliver and Barry wake up as wanted criminals and are forced to contend with both the police and a black-suited Superman. Note: This episode continues a crossover event that begins on The Flash season 5 episode 9 and concludes on Supergirl season 4 episode 9.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Arrow season 7. HTML formatting and reference markers removed. · Content license