Writer: Neil CrossStars: Idris Elba, Dermot Crowley, Michael SmileySummary: John Luther is a police detective, and a very good one. He deals with murder cases, often involving serial killers, and has a knack for getting inside the mind of the killer. However, his methods, personality and troubled private life often get him into strife with his superiors, leading some to regard him as the problem rather than the solution. —grantss