Season Three

Dark Side of the Moon

Supergirl (320) - Dark Side of the Moon
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When Supergirl and Mon-El investigate a nearby meteor they discover a Kryptonian city on the surface — her own home of Argo, where Kara’s mother is alive and well. Back on Earth Alex is targeted by an assassin.

U.S. air dates are in MM.DD.YY form.   U.K. air dates are in DD.MM.YY form.

News & Spoilers

SUPERGIRL LEARNS A STUNNING SECRET ABOUT KRYPTON

Supergirl (Melissa Benoist) is stunned to discover that a part of Krypton survived. Meanwhile, Alex (Chyler Leigh) is attacked while out with Ruby (guest star Emma Tremblay), and Lena (Katie McGrath) considers how far she will go to keep Reign contained.

Hanelle Culpepper directed the episode written by Derek Simon & Katie Rose Rogers (#320).