“Supergirl” Season 3 Finale “Battles Lost and Won” Trailer

The CW has released an extended promotional trailer for the Season 3 finale of “Supergirl”.

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.


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.