Stephen King’s original series “Mr. Mercedes” premiers Aug. 9 on AUDIENCE Network

The highly anticipated AT&T original series “Mr. Mercedes” premieres Aug. 9 on AUDIENCE Network. It’s based on the bestselling novel by Stephen King, who is also an executive producer.

“Mr. Mercedes” follows a demented serial killer who taunts a retired police detective with a series of lurid letters and emails. The former detective undertakes a private, and potentially felonious, crusade to bring the killer to justice before he can strike again.