For the eponymous multiversal phenomenon, see Elseworlds (concept).

Elseworlds is the name of the fifth annual shared multiverse crossover event between The Flash​​​​​, Arrow​​​​​, and Supergirl​​​​​. The crossover aired over three nights from December 9th to December 11th, 2018. This crossover serves as a set-up for the upcoming television series Batwoman​​​​​ and officially confirms The Flash​​​​​ to be canon for the Arrowverse.


The three-night event begins with Arkham Asylum doctor John Deegan rewriting reality, which results in Oliver and Barry swapping lives. In this new reality, the two heroes are the only ones that know that they are in the wrong lives and have each other's powers.[1]


On Earth-90, Flash escapes as a mysterious figure uses a powerful book to destroy that Earth. On Earth-1, the same figure gives the book to Arkham Asylum psychiatrist John Deegan, who uses it to rewrite reality according to his will. The following day, Oliver Queen and Barry Allen wake up in each other's lives; Oliver is the Flash and Barry is the Green Arrow. At S.T.A.R. Labs, Team Flash does not believe them and locks them up in "The Pipeline". Oliver and Barry use each other's abilities to escape and travel to Earth-38 to get help from Kara Danvers and acquaint themselves with her cousin Clark Kent(Superman) and Lois Lane. Meanwhile, an android called A.M.A.Z.O. awakens and threatens Central City. Cisco Ramon retrieves Oliver and Barry from Earth-38, with Kara and Clark helping. After defeating A.M.A.Z.O., Cisco vibes the mysterious figure and Deegan. The figure tells the group that something is coming and they will not be able to stop it. While Clark returns to protect Earth-38, Oliver realizes the figure and Deegan were located in Gotham City.

In Gotham, Barry, Oliver and Kara are arrested by the GCPD after getting into a fight. They are bailed out by Wayne Enterprises' CEO Kate Kane, who tells them Deegan is at Arkham Asylum. The trio, with the assistance of Caitlin and Diggle, break into Arkham to confront Deegan. They retrieve the "Book of Destiny" but Deegan escapes and causes a mass breakout. During a confrontation with inmate Nora Fries, Barry and Oliver are exposed to fear gasand believe each other to be Eobard Thawne and Malcolm Merlyn, respectively. After stopping the breakout, Kate, as the vigilante Batwoman, rouses them from their hallucinatory state and tells them to leave Gotham. They head to A.R.G.U.S. to restore reality, where Earth-90's Flash warns them about Mar Novu / Monitor. Barry, Oliver, Kara and Earth-90's Flash confront Monitor, who says he is rewriting reality to test out worlds to stop an upcoming crisis. Monitor steals the book, escapes and returns it to Deegan. He writes a new reality in which Barry and Oliver are criminals known as the Trigger Twins, who have no powers. They are confronted by a black-suited Superman.

Oliver realizes the Superman impostor is actually Deegan; they force him to save innocents while they escape to find Cisco. Deegan and his forces, including the Earth-1 doppelgänger of Kara's adoptive sister Alex Danvers, are holding Kara (who is known as Subject 1 and has committed several crimes in that reality) and S.T.A.R. Labs. They locate Cisco and persuade him to take them to Earth-38. They find Clark, who agrees to return with them to Earth-1 while Kara persuades Alex to release her. Arriving on Earth-1, Clark and Oliver fight Deegan and his forces so Alex, Barry, and Kara can find the Book of Destiny. They locate it in the Time Vault and take it to Clark, who restores Barry, Oliver, and Kara to their real selves. Deegan retrieves the book and attempts to rewrite reality again. To impede his progress, Barry and Kara slow down time by speeding around the Earth in opposite directions. Oliver confronts the Monitor, asking him to spare Barry and Kara, but the Monitor demands something from Oliver in exchange. Clark, joined by Lois, Brainiac 5, and J'onn J'onzz, fights Deegan and a revived A.M.A.Z.O. Barry and Kara are nearly torn apart by their speed but Oliver shoots the book with an arrow enhanced by the Monitor. Deegan reverts back to himself, though heavily disfigured, and reality is restored. After returning to Earth-38, Clark and Lois tell Kara they are expecting a child and will return to Argo City, leaving Earth's protection to her. On Earth-1, Oliver is contacted by Kate, who says Deegan, now incarcerated at Arkham, has made a new friend of masked Roger Hayden; who tells Deegan "Worlds will live, worlds will die, and the universe will never be the same".




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Title Cards


  1. "Arrowverse stars reveal details about the Trinity-centric 'Elseworlds' crossover" - Entertainment Weekly

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