A familiar terror revisits Shirley and Theo on Halloween night as Hugh and Steve go looking for Luke, who disappeared on a deadly errand.

As the Cranes gather to say their final goodbyes, a flashback reveals Mr. Dudley’s connection to the house — and exposes a secret in the walls.

Keenly perceptive Theo sees shades of herself in a troubled young patient, a girl who’s haunted by the menacing grin of “Mr. Smiley.”

A devastating family tragedy stirs memories of traumatic losses, reminding Shirley of her first brush with death — and awakening long-dormant fears.