The 23rd and final episode of Season 3 of “Supergirl” will air tonight.
Titled “Battles Lost and Won”, this episode is scheduled to air on The CW in the USA on Monday, June 18 at 8.00pm ET/PT.
SHOCKING SEASON FINALE
Supergirl (Melissa Benoist) and team take on Serena in an epic battle for Earth.
Jesse Warn directed the episode written by Robert Rovner & Jessica Queller.