"Elseworlds" is the fifth annual Arrowverse crossover event, featuring episodes of the live-action television series The Flash, Arrow, and Supergirl on The CW. The crossover is set to begin on December 9, 2018, with The Flash, continue on Arrow on December 10, and conclude on Supergirl on December 11.

Original air dates: December 9, 2018 (Flash); December 10, 2018 (Arrow); December 11, 2018 (Supergirl)

Directed by: James Bamford (Arrow)