Grace season 4 sees John Simm and the rest of the cast return for more dark and sinister cases.
Based on the bestselling novels by Peter James, the crime show follows the exploits of DS Roy Grace, who has been haunted for over a decade by the disappearance of his wife Sandy. In recent years he's found happiness with forensic pathologist Cleo Morey (Zoe Tapper), but will that happiness last?
