“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.”
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The CW has released the promo images for the Supergirl season 4 finale titled “The Quest for Peace,” featuring a Luthor family reunion while the girl of steel takes on the combined forces of her enemies.