A demented serial killer taunts a retired police detective with a series of lurid letters and emails, forcing the ex-cop to undertake a private, and potentially felonious, crusade to bring the killer to justice before he can strike again. Based on the bestselling novel by Stephen King.
At the end of episode, when you see Deborah go into the bathroom, look away for a few seconds. Not sure about visual, but there's definitely audio. It's very quick.