Lex Luthor Returns In New Promo For SUPERGIRL Season 4, Episode 21 – The Quest For Peace

“The Quest for Peace” – (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)

LEX LUTHOR RETURNS – Lex Luthor (guest star Jon Cryer) descends upon Washington, DC and summons Lena (Katie McGrath) and Lillian Luthor (guest star Brenda Strong) to the White House. Supergirl (Melissa Benoist) realizes she has one last chance to stop Lex and turns to the power of the press to help her. Jesse Warn directed the episode with story by Robert Rovner & Jessica Queller and teleplay by Rob Wright & Derek Simon (#422). Original airdate 5/19/2019

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