Supergirl Season Finale Trailer: “Battles Lost and Won”

“Battles Lost and Won” is the title of the Supergirl Season 3 finale airing Monday, June 18 on The CW. Everything has led into this!

Here’s the not very explicit episode description that The CW put out:

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.

You can see the “Battles Lost and Won” trailer below, and if you’ve just finished “Make It Reign” and want to talk about the episode with other fans, fly on over to our Supergirl discussion forum!

Hopefully we will have some official promo images soon.