Multiverses are all the rage on the big screen these days, from Doctor Strange in the Multiverse of Madness and Everything Everywhere All at Once to Spider-Man movies No Way Home and Across the Spider-Verse. The Flash, DC's latest, centers on the idea of there being several realities, too – and that if time is tinkered with, it can have devastating consequences for the meddler's past, present and future.
Lifting the basis of its plot from Geoff Johns' Flashpoint comic book crossover, the Ezra Miller-led film sees Barry Allen run back in time to save his mother Nora (Maribel Verdú). His return doesn't quite go to plan, though, and he gets stuck in 2013... right before he got his powers and Superman took down General Zod.
