Luther: Episode 3

Two hoodies are shot in what appears to be a gangland crime, until a third murder victim gives Luther a vital clue - someone is killing people who have a criminal record. Sure enough the culprit soon posts a film of himself online, calling for changes to the public justice system. The race is on to find the vigilante before he strikes again - but with so many potential victims, that may be easier said than done. As ever, the DCI's personal life gets in the way of his investigation when a distraught Mary turns up after a visit from Stark and Gray - can he convince her to ever trust him again? Idris Elba and Sienna Guillory star