The CW’s Supergirl finishes up season four with episode 22 titled “The Quest for Peace.” The season finale was directed by Jesse Warn from a story by Robert Rovner and Jessica Queller, teleplay by Rob Wright and Derek Simon. “The Quest for Peace” airs on May 19, 2019 at 8pm ET/PT.
The season four cast includes Melissa Benoist as Kara Danvers/Supergirl, Chyler Leigh as Alex Danvers, David Harewood as J’onn J’onzz, Jesse Rath as Querl Dox / Brainiac-5, Mehcad Brooks as James Olsen, Katie McGrath as Lena Luthor, Nicole Maines as Nia Nal/Dreamer, April Parker as Colonel Haley, Andrea Brooks as Eve Teschmacher, and Sam Witwer as Agent Liberty. Returning guest stars include Jon Cryer as Lex Luthor and Brenda Strong as Lillian Luther.
“The Quest for Peace” Plot – 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.
More on Season 4: