LUTHER returned to television screens this evening for season five and saw DCI Joh Luther investigate a spate of horrific murders across London. PUBLISHED: PUBLISHED: 22:10, Tue, Jan 1, 2019 DCI John Luther (played by Idris Elba) believed he had caught the killer in tonight’s first instalment. But in a shock turn of events, it was revealed Vivien Lake’s (Hermione Norris) patient William Lucas was not the killer. While police believed they had caught her patient and the killer, viewers learned the murderer was really Vivien’s husband. As she returned home from a police chase in Hampstead, she opened the boot of her car to show her husband Jeremy (Enzo Cilenti) quivering. Related articles Luther season 6 release date: Has Idris Elba confirmed another series? Luther season 5 spoilers: Alice Morgan’s return CONFIRMED She is awful. She’s bad Luther star Hermione Norris Following the sickening twist Vivien has chosen to protect her husband, actress Hermoine has spoken out. Speaking to press including Express.co.uk about the plot and her character, she said: “You do go on a journey with her, she’s clever. “Neil [Cross] is just clever, she is a clever woman, she works as a psychiatrist dealing with people with sexual deviances. “That’s what Neil does to all of the characters, which I love watching, Lluther being squeezed. “He literally puts you under such pressure and sort of squeezes. “She is really under pressure which forces her to make decisions that she wouldn’t necessarily make ethically, normally, but the story, the pressure of the narrative and thrill elements, so yeah it was great.” Luther season 5 spoilers: Vivien Lake star speaks out after THAT sickening twist (Image: BBC) Luther season 5 spoilers: The killer appeared to be Vivien's husband (Image: BBC) {%=o.title%} Hermione went on to elaborate: “She is awful. She’s bad. “It’s Neil Cross’ script, it’s so dark, each episode is beautifully crafted with such clearly defined characters and such incredible narrative, the threads, storylines that run through. “He’s not frightened of frightening. “He doesn’t pull any punches, for me it was just a huge privilege to work with Idris and everybody. Just an amazing, amazing script.” Meanwhile, speaking ahead of the show, actor Idris confirmed there would only be one killer this season. Related articles Luther season 5 spoilers: Why is George Cornelius back? Luther season 5 cast: Will Alice Morgan be in the new series? Luther season 5 spoilers: Hermione Norris takes on the role of Vivien Lake (Image: BBC) Luther season 5 spoilers: Alice Morgan returned to taunt to tease the detective (Image: BBC) “In this particular season, there is one antagonist, one murderer or killer, so many things fall out of that and it biomes a very complex web,” he actor explained. “Of course, you saw Alice showed up ad she isn’t here to given me Christmas cards, she’s here to give Luther a headache. “But I think what is really special about this particular season - it is a huge. “Four episodes in one movie, it starts to unfold and unfold and unfold, it’s scary.” Luther continues tomorrow on BBC One at 9pm.All rights reserved for this news site express.co.uk and under his responsibility