Finale to War on Infinite Earths! After Darkseid's forces kill most of Barry's allies, he is left with no other choice but to run backwards in time through the Speedforce and recruit heroes from the past. He lands on Lian Yu eight years prior on the day Oliver Queen is rescued from the island, recruiting his help. He later recruits John Diggle from Starling City. After learning that Kara Danvers, Superman and Martian Manhunter of Earth-Prime were killed in a surprise attack from Darkseid, Barry enlist the help of Eobard Thawne (aka Reverse Flash) in the form of Harrison Wells to travel to another Earth to find a version of Kara. Barry and Diggle recruit another Earth's Kara while Oliver and Thawne go to Nada Pardat to recruit a younger Sara Lance, and while there are met with John Constantine and Rip Hunter, both from the future to aid Barry in stopping Darkseid. Desperate for numbers, Barry, Diggle and Kara travel to Earth-2, where the recruit Pat Dugan, former sidekick to the JSA, as well as multiple members of the ISA. All regrouping on Earth-Prime, Barry and his new team work together to take the battle to Darkseid.
