As Marcus continues to embrace his Mithraic devotion, Sue worries he may no longer have her and Paul's best interests at heart. Meanwhile, Mother experiences what she believes to be malfunctions, and Hunter works on a secret project with Father.

Paul begins displaying troubling behavior that leads to a shocking revelation. Sue confides in Mother while Father battles unfamiliar human-like emotions. As Campion questions his place in his new family, Mother and Father uncover a distressing secret about Kepler-22b's native creatures.