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, eight years of dogged investigative work pass until one vital piece of evidence blows the case open.
A 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.
Special Investigating Officer Steve Wilkins is given permission to launch an operation to review evidence regarding a series of unsolved crimes.
Dogged detective work identifies a culprit when the body of Eastenders Gemma McCluskie is discovered in Regent's Canal in March 2012.
Back in December 1996, Tracie Andrews reports that two men fatally attacked her partner Lee Harvey after an incident of road rage. Suspicions arise when elements of Tracie's story don't stack up.