Lex Luthor’s schemes place him in the Oval Office, welcomed as a hero by the country. J’onn and Dreamer must help a group of alien prisoners escape from Lex’s facility on Shelly Island — before he can unleash his endgame on the Kryptonian colony of Argo.

U.S. air dates are in MM.DD.YY form. U.K. air dates are in DD.MM.YY form.

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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).