Chief Inspector John Luther returns to work again after isolating people to investigate a more mysterious criminal incident in a fourth season filled with surprise,While on a leave of absence, Luther is suddenly dragged back into his former life in London to battle the demons of his past and to stop a cannibal serial killer.Will a cold case unlock the mystery from Luther's past that is haunting him? The detective is forced to put himself and Emma in danger to stop the serial killer's end game.
You have to ask: of the four murders, two of the victims were male, yet we only saw the two women being stalked and killed?... why? Because seeing women vulnerable, terrified, objectified and brutalised is of a higher entertainment value?