Supergirl Season 3 Episode 4
Kara investigates a secretive new group whose leader, Thomas Coville, has a mysterious connection to Supergirl. Meanwhile, Samantha feels like she’s letting Ruby down, and J’onn confesses an old secret.
Director: Jesse Warn
Guest Star: Alex Zahara, Anjali Jay, Cameron Forbes, Carl Lumbly, Chad Lowe, David Carzell, Emma Tremblay, Erica Durance, Floriana Lima, Hyuma Frankowski, Khaira Ledeyo, Meghan Gardiner, Nick Fontaine, Sage Brocklebank, Sofia Vassilieva
Episode Title: The Faithful
Air Date: 2017-10-30