As Caitlin and Thunderbird struggle to save the life of a mutant injured in the Inner Circle's chaotic liberation of a psychiatric hospital, they discover clues to the identity of the powerful mutant Polaris and Andy were sent to retrieve.

Cast: Stephen Moyer, Amy Acker, Sean Teale, Natalie Alyn Lind, Percy Hynes White, Coby Bell, Jamie Chung, Blair Redford, Emma Dumont, Skyler Samuels, Grace Byers, Faith Dillon, William Mark McCullough, Troy Parker, Paul Pillsbury