Supergirl: 4x9
Elseworlds (III)
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).
4 - 1American Alien Oct. 14, 2018
4 - 2Fallout Oct. 21, 2018
4 - 3Man of Steel Oct. 28, 2018
4 - 4Ahimsa Nov. 04, 2018
4 - 5Parasite Lost Nov. 11, 2018
4 - 6Call to Action Nov. 18, 2018
4 - 7Rather the Fallen Angel Nov. 25, 2018
4 - 8Bunker Hill Dec. 02, 2018
4 - 9Elseworlds (III) Dec. 11, 2018