On Supergirl Season 4 Episode 15, Lena turns to her devious brother, Lex, to finish her serum in time to save James' life. Does she succeed?
On Supergirl Season 4 Episode 15, a very sick Lex Luthor is furloughed out of prison and helps Lena perfect her serum to save James Olsen's life. But the longtime villain has other plans in mind for National City and it's hero, Supergirl.
On Supergirl Season 4 Episode 15, Lex Luthor gets a furlough from prison due to ill health, but what is the villain's master plan to take down a hero?