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On Supergirl Season 3 Episode 23, Supergirl and the team take on Serena in a battle to keep Earth away from the villains, but does everyone make it out alive?
On Supergirl Season 3 Episode 22, the truth about Serena's plan for Earth is revealed as Reign makes her grand return. Is it too late for one of them?
On Supergirl Season 3 Episode 21, Kara considers a major life deicsion while J"onn discovers DEO guns have hit the streets of National City.
On Supergirl Season 3 Episode 20, Lena decides how far she'll go to control Reign, Alex and Ruby are attacked, and Kara learns a part of Krypton survived.
On Supergirl Season 3 Episode 19, a former disciple of Coville’s gives Kara and James a journal that could hold the key to figuring out how to save Sam.
On Supergirl Season 3 Episode 18, Supergirl and Alex work together in order to keep Ruby safe when Reign begins her hunt to find and kill the girl.
On Supergirl Season 3 Episode 17, with the Worldkillers united, Supergirl and team brace for an epic battle, and James must make a decision about he and Lena.
On Supergirl Season 3 Episode 16, Supergirl and Imra must work together to stop the thrid Worldkiller, but which one of them had the best plan?
On Supergirl Season 3 Episode 15, Mon-El trains Kara in fighting techniques from the future for battling Worldkillers, while Myr’nn causes psychic disturbances.
On Supergirl Season 3 Episode 14, when Winn's father dies and a copycat Toyman appears, he must work with his estranged mother to stop the attacks.