Okay. I'm going to use a Wikipedia for this. Not because I'm out of time. For two reasons though: One, I could, never, ever explain this properly where it would actually make sense. And two, I've already watched the next episode and there is zero chance I'll be able to keep them straight in my mind. (But that one is gonna get a Wikipedia too, because I 100% have no idea what happened. Somehow the most confusing episode of this crossover, was Arrow. đ€·ââïž)
Ray Palmer's "Paragon Detector" identifies Barry, J'onn J'onzz, and Ivy Town scientist Ryan Choi as the remaining three, so Ralph, Iris, and Ray leave to recruit Choi.
After the Monitor restores Cisco's powers, Team Flash and Nash (now Pariah) return to the chamber the latter found and discover an anti-matter cannon and Earth-90's Barry powering it. Cisco frees him, but the cannon starts going critical, so Pariah recruits Black Lightning from another Earth to help contain the energy. As Barry prepares to destroy the cannon, Earth-90 Barry stops him to sacrifice himself in his place.
Elsewhere, John Constantine, Mia Smoak, and John Diggle visit Lucifer on Earth-666 to recover Oliver Queen's soul, which they find in Purgatory. Before they can leave, Jim Corrigan appears, wanting to pass the Spectre's power onto Oliver. He accepts and Constantine's team is sent back without him.
While the heroes regroup, the Anti-Monitor sends a brainwashed Harbinger to attack them and kill the Monitor so he can finish destroying the multiverse. Before he and the rest of the team is killed, Pariah teleports the Paragons to the Vanishing Point, where they learn Lex Luthor used the Book of Destiny to replace Earth-96's Superman with himself.