One of the most under the radar Stephen King adaptations headed our way is AT&T Audience Network’s drama series “Mr. Mercedes,” of course based on the same-named King novel that was published back in 2014. We recently learned that the small screen adaptation of King’s hard-boiled detective tale would be arriving this summer, and now we’ve got an official date.

Look for “Mr. Mercedes” on Wednesday, August 9.

Brendan Gleeson leads as Detective Bill Hodges, along with Harry Treadaway (Penny Dreadful) as Brady Hartsfield. Jharrel Jerome (Moonlight) is cast as Jerome Robinson, Scott Lawrence (Avatar) as Detective Peter Dixon, Robert Stanton (Mercury Rising) as Anthony “Robi” Frobisher, and Ann Cusack (Nightcrawler) as Olivia Trelawney, with Mary Louise-Parker (Weeds) as Janey Patterson, and Holland Taylor (The Truman Show) as Ida Silver. Kelly Lynch (Deborah Hartsfield), Justine Lupe (Holly Gibney) and Breeda Wool (Lou Linklatter) also star.

King himself will reportedly appear in a cameo role.

Based on Stephen King’s 2014 book, “Mr. Mercedes” follows demented killer Brady Hartsfield (Treadaway), who taunts a retired police detective Bill Hodges (Gleeson) 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 is able to strike again.

David E. Kelley wrote adaptation, produced by Sonar Entertainment. Jack Bender directs. Both executive produce along with Temple Hill Entertainment’s Marty Bowen and Wyck Godfrey.