Lex Luther Is Up To No Good In New Supergirl 4×15 “O Brother, Where Art Thou?” Promo

The promo for an upcoming episode of Supergirl has been released. This new episode is titled “O Brother, Where Art Thou?” and it will air on March 17.

In this new episode, “Secretly furloughed from prison due to failing health, Lex Luthor (guest star Jon Cryer) visits his sister, Lena (Katie McGrath), 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 (Melissa Benoist) and J’onn (David Harewood) face off against Manchester Black (guest star David Ajala). James’ sister Kelly (guest star Azie Tesfai) comes to town.”

Source: The CW