Supergirl returned for Season 4 on October 14, 2018.

Season 4 Episode 21 is titled “Red Dawn ” Here is the synopsis from TV Guide: “Kara comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a way to extract the Harun-El, Lena turns to an unlikely source for help—Lillian Luthor. Meanwhile, Alex realizes she’s missing parts of her memory, and Brainy, Nia and J’onn set out to track down aliens who have been abducted by Lex.”

Don’t miss Supergirl “Red Dawn” airing Sunday, May 12, 2019 at 8/7c on The CW.

Photos Courtesy of The CW

Video Courtesy of Supergirl Official Twitter

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