The Suspect is based on the bestselling novel by crime writer Michael Robotham, and stars Poldark's Aidan Turner as Dr Joseph O’Loughlin.
From the producers of Line of Duty and Vigil, Joseph seems to have the 'perfect' life - a happy marriage, loving daughter and a successful career as a clinical psychologist.
He’s even a hero online after rescuing a young patient who was ready to jump from the tenth floor of the hospital where Joe works.
When a woman is found in a shallow grave in a London cemetery, Joe offers his expertise to the police - despite his recent diagnosis with a debilitating illness.
However, as ITV explains: "As a successful author, Doctor Joe’s opinion is much sought after and when he meets DS Devi he’s only too willing to offer help with profiling and his expertise.
"Now known for his risk-taking and rule-breaking does Joe have more to hide? His recent diagnosis with a debilitating illness could explain his behaviour.
"But as the investigation into Catherine’s death gathers pace, we start to ask, do we know the real Joe, or does he have a secret life? And has his work as a clinical psychologist allowed him to develop a criminal mindset? Or worse?"
Speaking about his role in the five-part series, Turner said: “I am thrilled to be taking on the complex and demanding role of Joseph O’Loughlin, a man with so much to give but so much to lose, and a hidden darker side.”
Meanwhile writer Peter Berry added that creating the series 'has been a fantastic and fascinating journey'.
"I hope the audience will find it equally enthralling," he said.
"As they delve the depths of a truly iconic character caught up in a story that will test his faith in his profession, his family and himself."
Also starring alongside Turner is Shaun Parkes as DI Ruiz and Anjli Mohindra as DS Devi, along with Camilla Beeput, Adam James, Bobby Schofield and Sian Clifford.
The show is also being directed by James Strong, who worked on the likes of Vigil, Liar and Broadchurch.
Filming took place in London last autumn, and the series will air next month on ITV
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