The BBC have released the first trailer for series 3 of Luther, starring Idris Elba, which I've heard will premiere sometime in July on BBC1. Continuing the format of series 2, it will tell two stories over four episodes, and the big new co-star is Sienna Guillory (Eragon, Inkheart). Ruth Wilson will also reprise her role as serial killer Alice Morgan, and Warren Brown returns as loyal DS Ripley.
Interestingly, BBC America have previously announced that series 3 will be shown across four nights from 3-6 September, so I wonder if the BBC are planning a similar "event" for the home audience. I hope not, because Luther's a pretty dark and gruelling drama. I think you need the traditional week-long gap between episodes to take it all in. A nightly trip into the world of John Luther may send a few people over the edge, don't you think?