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.

A dark specter with an unsettling silhouette has haunted Nell since she was a girl. Now “the Bent-Neck Lady” is back — and she’s calling Nell home.

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