Luther's back. Pitted against his most chilling adversary yet, haunted by the ghosts of his past and hell-bent on retribution, he's drawn into a terrifyingly complex case that pushes him closer to the edge than he's ever been.
Idris Elba returns to his role as a self-destructive near-genius detective on the edge of law enforcement. Detective Chief Inspector John Luther (Elba) will learn the hard way; he may never be able to walk away from capturing the tormented psychopaths that lurk the streets of London.
His attempt to leave the darker side of humanity behind for a chance at a "normal" life is quickly thwarted when he's drawn into a terrifyingly complex case. A cannibalistic serial killer delivers a devastating blow that not only pulls him out of seclusion but pushes him closer to the edge than he's ever been.
Struggling to cope with his own demons after losing so much, it seemed normalcy would always elude the emotionally impulsive detective. Teflon tough, even the strongest couldn't endure what Luther has seen and been through.
Hunting London's most depraved criminals forced him to tap into the dark recesses of his mind, revealing sides of himself that would horrify most. The heartbreaking loss of his wife to a brutal murderer and his inner-circle of colleagues turning on him in a witch hunt weren't enough to keep him away from the job.
But watching his most trusted colleague and friend, Detective Sergeant Justin Ripley (Warren Brown, The Dark Knight Rises, Inside Men), die in his arms after getting caught in the crossfires of a case, finally pushed him over the slippery slope he's always towed.
A forbidden connection with serial-killer, Alice Morgan, offered him a somewhat skewed version of a happy ending and he took it.
This time we find Luther on a leave of absence from the police force, laying low in a rundown cottage. A visit from colleagues, Detective Chief Inspector Theo Bloom (Darren Boyd) and Detective Sergeant Emma Lane (Rose Leslie) brings a shocking piece of news that draws him back to London in search of the truth.
At the same time, a gruesome cannibalistic serial killer has struck the city, eating body parts as he goes.
With a trail of clues leading from one crime scene to the next, Detective Superintendent Unit Martin Schenk (Dermot Crowley) and his team must work out the twisted logic that connects each victim.
But this murdering mastermind is more than a match for Schenk's police, outsmarting them at every step. It's not long before Luther makes his triumphant return to the Bullpen, determined to capture the killer before another mutilated body joins the mounting pile.
But he's dogged at every turn by ghosts from his past. Isolated and volatile, it will take every fiber of Luther's being to keep it together.
Written and created by Neil Cross and directed by Sam Miller, Season 4 also stars Laura Haddock as Megan Cantor, a mysterious woman from Luther's past; John Heffernan as the sadistic cannibal Steven Rose; Patrick Malahide as George Cornelius, an old school gangster; and Michael Smiley returning as computer whiz Benny Silver.