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Season 1 - Oct. 26, 2015
Season 2 - Oct. 10, 2016
Season 3 - Oct. 09, 2017
Season 4 - Oct. 13, 2018
Season 5 - Oct. 06, 2019
Season 6 - Mar. 30, 2021
Supergirl Season 4 Episode 9
HD
Overview:
Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives.
The crossover starts on The Flash S05E09 Elseworlds (I) and Arrow S07E09 Elseworlds (II).