![Supergirl Season 3 Episode 18 Supergirl Season 3 Episode 18](https://image.tmdb.org/t/p/w185/ufoGrTRbItHvqk42yNHcyoE0afM.jpg)
Supergirl Season 3 Episode 18
When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J’onn look to Sam’s mother for advice on how to stop Reign and come away with some shocking news.
Serie: Supergirl
Director: Antonio Negret
Guest Star: Amy Jackson, Betty Buckley, Cynthia Stevenson, Emma Tremblay, Jesse Rath, Nesta Cooper