Supergirl: Reign

"Reign" is the ninth episode of season three of the superhero fantasy series Supergirl and the forty-seventh episode of the series overall. It was directed by Kevin Smith with a script written by Eric Carrasco and Cindy Lichtman. It first aired on the Supergirl: Legion of Super-HeroesW Network]] on Monday, December 8th, 2017 at 8:00 pm.