The CW’s Supergirl season three episode 17 will find #TeamSupergirl taking on the combined power of the three Worldkillers. Caitlin Parrish and Erica Weiss directed the episode from a script Parrish wrote with Derek Simon (story by Jessica Queller). The episode titled “Trinity” will air on May 7, 2018.
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 “Trinity” Plot: SUPERGIRL TAKES ON ALL THREE WORLDKILLERS – Still reeling after learning about Lena’s (McGrath) secret, Supergirl (Benoist) asks Guardian (Brooks) for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.