The CW’s Supergirl season three episode 17 found the team going up against the three Worldkillers. Although two were dead by the end of the episode, their powers were absorbed by Reign. In season three episode 18, Team Supergirl’s going to have to attempt to defeat the incredibly powerful remaining Worldkiller.
Season three episode 18 is titled “Shelter From the Storm” and will air on May 14, 2018. The episode was directed by Antonio Negret from a script by Lindsay Gelfand and Allison Weintraub.
The season three cast includes Melissa Benoist as Kara Danvers/Supergirl, Chyler Leigh as Alex Danvers, David Harewood as J’onn J’onzz, Jeremy Jordan as Winn Schott, Mehcad Brooks as James Olsen, Katie McGrath as Lena Luthor, Chris Wood as Mon-El of Daxam, and Odette Annable as Reign. The series is executive produced by Greg Berlanti, Sarah Schechter, Robert Rovner, and Jessica Queller.
The “Shelter From the Storm” Plot: REIGN SETS HER SIGHTS ON RUBY – When Reign (Annable) starts hunting Ruby (guest star Emma Tremblay), Supergirl (Benoist) and Alex (Leigh) work together to keep her safe. Supergirl and J’onn (Harewood) look to Sam’s mother (guest star Betty Buckley) for advice on how to stop Reign and come away with some shocking news.