When a woman's body is found at a pumping station in Hull, senior investigating officer Paul Davison and his team must find out how she died.

Tony Blockley and his team find a perplexing murder scene and launch an inquest.

When a body is found by a river in Cumbria that is 70 miles from home, eight years of tireless investigative work pass until one vital piece of evidence blows the case wide ope

A dangerous killer is on the loose and detectives need to act fast when the bodies of two men are found stabbed to death in neighbouring flats in Derby

When Special Investigating Officer Steve Wilkins is shocked at a series of unsolved crimes in his hometown, he is given permission to launch a new operation to review all the evidence

When the body of EastEnders actress Gemma McCluskie is discovered in Regent's Canal in March 2012, dogged detective work eventually leads the police to her brother Tony

Tracie Andrews purportedly witnesses the murder of her boyfriend Lee Harvey in a country lane in December 1996, but all is not as it seems

Cameras follow author and journalist Satish Sekar, who is determined to seek justice for three men wrongly imprisoned for murder. When police and politicians agree to reopen the case, a real killer is put behind bars.

In 1992, police and the family of 25-year-old Stephanie Slater feared the worst when the estate agent went missing, the start of an eight-day ordeal defined by terror.