“Supergirl” Season 4 Finale “The Quest for Peace” Promo Trailer

The CW has released the promo trailer for the 22nd and final episode of Season 4 of “Supergirl”.

Titled “The Quest for Peace” this episode is scheduled to air on The CW in the USA on Sunday, May 19 at 8.00pm ET/PT.


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 and Jessica Queller and teleplay by Rob Wright and Derek Simon.