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
4 - 10Suspicious Minds Jan. 20, 2019
4 - 11Blood Memory Jan. 27, 2019
4 - 12Menagerie Feb. 17, 2019
4 - 13
4 - 14Stand and Deliver Mar. 10, 2019
4 - 15O Brother, Where Art Thou? Mar. 17, 2019
4 - 16The House of L Mar. 24, 2019
4 - 17All About Eve Mar. 31, 2019
4 - 18Crime and Punishment Apr. 21, 2019
4 - 19American Dreamer Apr. 28, 2019
4 - 20Will The Real Miss Tessmacher Please Stand Up? May. 05, 2019
4 - 21Red Dawn May. 12, 2019
4 - 22The Quest for Peace May. 19, 2019