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...

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