- Previous episode S04E20 - Will The Real Miss Tessmacher Please Stand Up?
- Number S04E21
- Director Alexis Ostrander
- Writers Eric Carrasco, Gabriel Llanas, Lindsay Sturman
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.