Supergirl: Battles Lost and Won

"Battles Lost and Won" is the twenty-third episode of season three of the superhero fantasy series Supergirl and the fifty-sixth episode of the series overall. It was directed by Glen Winter with a script written by Caitlin Parrish and Derek Simon. It first aired on the CW Network on Monday, June 18th, 2018 at 8:00 pm.