"Luther" is a TV rarity. A show beloved by fans the world over, it never overstays its welcome, and shows up just when you need it. Created and written by Neil Cross, "Luther" follows Detective Chief Inspector John Luther, an officer consumed with the weight of the crimes he investigates. Across the series, Luther and the other members of his unit, including Detective Sergeant Justin Ripley (Warren Brown), Detective Superintendent Martin Schenk (Dermot Crowley), and DS Benny Silver (Michael...