Season 3 Episode 22

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Make It Reign

Supergirl learns the true depth of Serena's nefarious plans for Earth. Supergirl, Mon-El and Alura must devise a plan to stop her before Serena gets to Earth. J'onn prepares to say goodbye to his father. The crossover continues on The Flash S03E08 Invasion! (II), Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).

Season: 3
Episode: 22
Air Time: 9:00 PM EST
Buy or Stream: Amazon
Air Date: 2018-06-11
Air On: CW