In Bedfordshire, a man accused of a string of offences involving violence embarks on a frightening new crime spree. Armed officers are deployed as the suspect becomes 'Most Wanted'.
In Luton, a man is shot in the chest by a complete stranger. The same suspect threatens a woman. With a gunman on the loose, a frantic manhunt is launched to catch the shooter before he strikes again.
Cambridgeshire Police have a big problem: a murder hunt without a body. A complex search for clues takes them into the woods and across Europe, and features a mysterious post on Facebook.
In Luton, a man who has been attacked at home dies of severe brain trauma. The investigating officer met the victim a week before and is haunted by the idea that maybe she could have saved his life.