Supergirl Season 4 Episode 21
Red Dawn
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.
Guest Stars
Azie Tesfai
Kelly Olsen / Guardian
Bruce Boxleitner
President Baker
April Parker Jones
Colonel Lauren Haley
Izabela Vidovic
Young Kara
Olivia Nikkanen
Young Alex