Season 3 Episode 4: The Faithful
Airdate: 30 October 2017 (US) / 31 October 2017 (Aus)

Kara (Melissa Benoist) investigates a secretive new group whose leader, Thomas Coville (guest star Chad Lowe), has a mysterious connection to Supergirl. Meanwhile, Samantha (Odette Annable) feels like she’s letting Ruby (guest star Emma Tremblay) down, and J’onn (David Harewood) confesses an old secret.

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