Watch The Supergirl 4×22 Promo “The Quest for Peace”

The promo for the season finale of Supergirl has been released. This new episode is titled “The Quest For Peace” and it will air on May 19.

In this new episode, “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.”

Source: The CW