The cast for the crossover will consist of characters from Arrow, The Flash, DC’s Legends of Tomorrow, Supergirl, Batwoman, and even some characters from Black Lightning, making their debut in the Arrow-verse.
Crisis on Infinite Earths will kick off on December 8 in Supergirl.
Part 2 will hit Batwoman on December 9, before The Flash takes part 3 on December 10.
Then on January 14, 2020, Arrow and DC’s Legends of Tomorrow will wrap up the crossover.