The CW has released the synopsis for episode #304 of Supergirl, which you can check out below. The installment, titled “The Faithful,” is officially described as follows:
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CHAD LOWE GUEST STARS
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.
Supergirl, “The Faithful,” was directed by Jesse Warn and by written by Paula Yoo & Katie Rose Rogers. The episode airs Monday, October 30, at 8pm on The CW.