Season 4 Episode 15

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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.

Season: 4
Episode: 15
Air Time:
Air Date: 2019-03-17
Air On: CBS, The CW