Supergirl - Episode 3.23 - Battles Lost and Won (Season Finale) - Sneak Peek, Inside the Episode, Promos, Promotional Photos + Press Release By SpoilerTV (June 18, 2018, 7:12 pm)
Inside The Episode
Melissa Benoist Previews The Finale
SUPERGIRL “Battles Lost and Won” — (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)
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 (#323). Original airdate 6/18/2018.