Police are digging in the back garden of a house in Luton searching for the body of a woman who disappeared in 2003. They believe a painstaking fingertip search might reveal vital clues in a suspected murder enquiry. Natalia Wilkanowska's disappearance left detectives from the Major Crime Unit puzzled and frustrated with the lack of answers to their questions. Without answers the family can't lay her memory to rest and properly grieve. Cameras follow every extraordinary twist and turn of an investigation where detectives have decided it's time to solve the job by turning up the heat on their suspects. This is real-life crime drama at its most intense.

A woman has reported to police that she's living in fear because she believes a man who she once regarded as a friend has begun to stalk her. The police are only too aware that they've got to act in case the situation escalates out of control, so they arrest him. One in five women say they've been a victim of stalking, and tougher sentences have recently been introduced to tackle the crime. But the man denies that he's a stalker. Cameras follow the victim and the prime suspect as they argue over whether he has crossed a line and their friendship has now turned into an unhealthy obsession. Police unpick the case as they try to work out who's telling the truth and whether they have the evidence they need to charge the suspect.