Soon after the Brannock family moves into their dream home, they receive a threatening letter from a mysterious sender - and suffer an unexpected loss.
The pool of suspects shrinks in the wake of a neighborhood tragedy. Karen offers Nora a way out. A strange visitor tells Dean about the Fourth Turning.
Dean and Nora find a hidden room where someone's been living. Theodora shares intriguing intel about Roger Kaplan. The family makes a fateful decision.