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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.
On Supergirl Season 3 Episode 9, a mysterious symbol tracing back to an ancient prophecy of the World Killer, Reign, pops up all over National City.
On Supergirl Season 3 Episode 8 the heroes of the Arrowverse come together for Barry Allen and Iris West's big wedding that gets crashed by evil forces from Earth-X.
On Supergirl Season 3 Episode 7, Winn discovers an alien ship has crash landed deep underwater beneath National City and Kara is called in to investigate.
On Supergirl Season 3 Episode 6, Kara and Alex head home to Midvale for a little R&R. While there, Kara recalls a painful memory that brought the sisters closer together.