Supergirl Season 4 Episode 15
O Brother, Where Art Thou?
Secretly furloughed from prison due to failing health, Lex Luthor visits his sister, Lena, to seek her help finding a cure. Savvy as ever, Lena is suspicious of Lex's motives but when she's faced with a life and death situation, she must decide how she truly feels about her brother. Meanwhile, Supergirl and J'onn face off against Manchester Black. James' sister Kelly comes to town.
Guest Stars
Azie Tesfai
Kelly Olsen / Guardian
David Ajala
Manchester Black
William MacDonald
Dr. Kaplan
Byron Brisco
Guard #2
Christina Lewall
Trauma Doctor