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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.
On Supergirl Season 3 Episode 3, the DEO captures Reign, but does she have another big trick up her sleeve?
On Supergirl Season 3 Episode 12, when someone tries to kill Morgan Edge, he accuses Lena of being behind the attempt and vows to destroy her.
On Supergirl Season 3 Episode 11, Kara and Imra team up with former enemies Livewire and Psi for a mission to Fort Rozz to recover a prisoner with information on how to defeat Reign.
On Supergirl Season 3 Episode 10, while struggling to heal from her injuries, Kara remains in a dreamlike state, unable to be reached. Mon-El recruits a legion member to bring her back.