The series follows a demented killer Brady Hartsfield (Harry Treadaway) who taunts a retired police detective Bill Hodges (Brendan 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.
The cast includes Brendan Gleeson ("Harry Potter") as Detective Bill Hodges, Harry Treadaway ("Penny Dreadful") as Brady Hartsfield, Kelly Lynch ("Magic City") as Deborah Hartsfield, Jharrel Jerome ("Moonlight") as Jerome Robinson, Scott Lawrence ("Avatar") as Detective Peter Dixon, Robert Stanton ("Mercury Rising") as Anthony "Robi" Frobisher, Breeda Wool ("Unreal") as Lou Linklatter, Justine Lupe ("Francis Ha") as Holly Gibney, and Ann Cusack ("Nightcrawler") as Olivia Trelawney, with Mary Louise-Parker ("Weeds") as Janey Patterson, and Holland Taylor ("The Truman Show") as Ida Silver.
"Mr. Mercedes," which King describes as his first hard-boiled detective tale, was published by Scribner in June 2014. "Mr. Mercedes" became an immediate No. 1 New York Times Bestseller upon its release. Shortly after the release of the novel, King announced that "Mr. Mercedes" was the first of a projected trilogy. The second novel, "Finders Keepers," was published by Scribner in June 2015 and the third novel, "End of Watch," was published by Scribner in June 2016.
"Mr. Mercedes" is produced by Sonar Entertainment and emple Hill Entertainment. Creator David E. Kelley ("Boston Legal," "Ally McBeal," "The Practice") and Jack Bender ("Lost," "Under the Dome," "Game of Thrones") serve as executive producers, along with Temple Hill Entertainment's Marty Bowen and Wyck Godfrey.