The official trailer for the AT&T Original Mr. Mercedes is here! From Executive Producers Stephen King, David E. Kelley and Jack Bender comes the story of a demented serial killer who taunts a retired police detective with a series of lurid letters and emails. This forces the ex-cop to undertake a private, and potentially felonious, crusade to bring the killer to justice before he can strike again.

Catch the premiere on Audience Network August 9th at 8pm ET/PT on DIRECTV CH. 239, U-verse CH. 1114 or streaming on DIRECTV NOW.