After last night’s all new episode of Supergirl we got presented with the first look promotional trailer for the upcoming seventeenth episode of the season which has been titled “Trinity” and you can check it out above.
“Trinity” — (8:00-9:00 p.m. ET) (TV-V) (HDTV)
SUPERGIRL TAKES ON ALL THREE WORLDKILLERS – Still reeling after learning about Lena’s (Katie McGrath) secret, Supergirl (Melissa Benoist) asks Guardian (Mehcad 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. Caitlin Parrish & Erica Weiss directed the episode with story by Jessica Queller and teleplay by Caitlin Parrish & Derek Simon (#317). Original airdate 5/7/2018.
Supergirl airs on Mondays, on The CW.