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 shocking news.

Director: Antonio Negret

Writers: Jerry Siegel (based on characters created by), Joe Shuster (based on characters created by) | 6 more credits »

Stars: Melissa Benoist, Mehcad Brooks, Chyler Leigh