Brendan Gleeson is returning to television screens in the second season of cat-and-mouse thriller series Mr Mercedes, and the new trailer shows that his character, private detective Bill Hodges, has not heard the last from mass murderer Brady Hartsfield (Harry Treadaway).

Warning: spoiler alert!

Hartsfield is in a vegetative state in hospital, but then strange things start to happen...

Season two of Mr Mercedes premieres in the US on August 22. The series is based on Stephen King's 'Bill Hodges Trilogy'.