Cameras follow all the twists and turns of the major investigation into an allegation of police corruption, as detectives track down, arrest and then charge a fellow officer.

A man lies dead in a Peterborough park. The position of his body raises intense suspicions but rigor mortis has set in and the trail of evidence is going cold. Detectives are called in to investigate.

Police search in a Luton garden for the body of a woman who disappeared in 2003, as they turn up the heat on suspects in a case that's puzzled them for years.

The police search for a couple who they believe have exploited a young, vulnerable woman by taking over her flat to use it as a drugs base.

A woman has reported to Bedfordshire police that she is living in fear because she believes a man who she once regarded as a friend has begun to stalk her, and officers are sent to arrest him. Cameras follow the complainant and the prime suspect as they argue over whether he has crossed a line and what was once friendship has now turned into an unhealthy obsession.