17. Trinity (2018)
Still reeling after learning about Lena’s secret, Supergirl asks Guardian 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.
Release date: 2018-05-07
User rating:
6.81 / 10
16 votes
Season number: 3
Episode number: 17
Runtime: 42 minutes
Directors: Caitlin Parrish, Erica Weiss
Guest stars
Cast
Melissa Benoist
as Kara Danvers / Supergirl / Kara Zor-El
Chyler Leigh
as Alex Danvers / Sentinel
David Harewood
as J'onn J'onzz / Martian Manhunter
Katie McGrath
as Lena Luthor
Odette Annable
as Samantha Arias / Reign
Chris Wood
as Mon-El
Jeremy Jordan
as Winn Schott
Mehcad Brooks
as James 'Jimmy' Olsen / Guardian