Once AJ escapes from the Mother while he's still trapped in the tunnels, he eventually finds another secret room. However, he's not alone. Soon after looking around the room, AJ notices that a frail old man is also in the room, and he tries to help him speak. While this would seem like a hopeful moment at first, audiences will quickly realize that the old man is Frank — the original owner of the house who is a serial rapist — and know that he is not to be trusted.

Frank is initially introduced in some flashbacks of him stalking a woman that show him to be a bad guy, and seeing him again is absolutely terrifying as you're already aware of his sinister behavior. Every move he makes feels like it could have horrifying consequences for AJ, and your eyes are locked onto the cord for the bell system in fear that he'll pull it. AJ too eventually realizes Frank's sadistic behavior and ridicules him before Frank takes things into his own hands. It's a sequence that starts with an unexpected return of a terrifying character and continually leaves you on edge as Cregger plays with your fears of Frank.

If you or anyone you know has been a victim of sexual assault, help is available. Visit the Rape, Abuse & Incest National Network website or contact RAINN's National Helpline at 1-800-656-HOPE (4673).