Nevertheless, She Persisted: Supergirl (Melissa Benoist) challenges Rhea (guest star Teri Hatcher) to battle to save National City. Meanwhile, Superman (guest star Tyler Hoechlin) returns and Cat Grant (guest star Calista Flockhart) offers Supergirl some sage advice.
Glen Winter directed the episode with story by Andrew Kreisberg & Jessica Queller and teleplay by Robert Rovner & Caitlin Parrish.
Series: Supergirl Season 2 Episode 22 (Season finale)
Air Date: Monday, May 22, 2017
Time Slot: 8:00 PM-9:00 PM EST on The CW