The first clip from Marcella series two hints at a chilling storyline – as the detective surveys the gruesome remains of a long-dead school child and announces, with a look of horror: "I know who that is."
Detective Sergeant Marcella Blackland returns to ITV for another eight-part series which will apparently "lead the audiences on a complex and emotional journey and keep them guessing until the very end".
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This story begins with the discovery of a body inside a wall, now little more than a skeleton in a school blazer surrounded by soft toys, covered in tarpaulin and weighed down by bricks.
The dead child, Marcella quickly realises, is Leo Priestley: a friend of her son who was abducted a few years ago. The case was never solved.
Written by The Bridge screenwriter Han Rosenfeldt and set in modern-day London, the story will start to unfold as Marcella gets on the case alongside her newly-promoted DCI, Tim Williamson (Jamie Bamber) and a newcomer DC Leanne Hunter (Sophie Brown).
Marcella series two begins on Monday February 19th at 9pm on ITV