The Season 5 premiere on BBC One was the most watched show on New Year's Day in the UK.
Ruth Wilson, Dermot Crowley, Michael Smiley and Patrick Malahide return for the four-part series as Alice Morgan, DSU Martin Schenk, Benny Silver and George Cornelius; Wunmi Mosaku joins as new recruit D.S. Catherine Halliday, Hermione Norris plays psychiatrist Dr Vivien Lake and Enzo Cilenti her husband Jeremy Lake.
When the moonless shadows of London give birth to a new nightmare, DCI John Luther must once again confront the depths of human depravity.
As a series of monstrous killings becomes ever more audacious, Luther and new recruit D.S. Catherine Halliday are confounded by a tangle of leads and misdirection that seems designed to protect an unspeakable horror.
But even as the case brings him closer than ever to the nature of true evil, a reluctant Luther must also face the ghosts of his own past. Striding back into the line of fire, he must choose who to protect… and who to sacrifice.
Whatever his next move, it will have devastating consequences for those around him - and will change John Luther forever.
Luther (4x60’) was commissioned by Piers Wenger and Charlotte Moore for BBC One, and is produced by BBC Studios, the BBC’s commercial production arm and co-produced with BBC America. Executive producers are Idris Elba for Green Door Pictures, Neil Cross, Marcus Wilson and Hilary Salmon for BBC Studios and Elizabeth Kilgarriff for the BBC.
The series was produced by Derek Ritchie (Class, Doctor Who), directed by Jamie Payne (The Alienist, White Princess) and distributed by BBC Worldwide and co-produced with BBC America.
A launch date for BBC America's premiere in the United States is yet to be announced.
Hard Sun is a pre-apocalyptic crime drama set in contemporary London starring Jim Sturgess and Agyness Deyn.
Crossbones, the NBC television series starring John Malkovich, premieres in the States on May 30.
Series 3 of Luther aired in the United States on 3 September 2013 following a hugely successful season on BBC One in the UK.