Without Motive

Plot

Detective Constable Jack Mowbray investigates the brutal murder of a young woman in Bristol, which sets off a chain of events that threatens to tear his family apart and change his life. The Bristol murder is linked to a series of recent killings known as the 'M4 Murders', and the investigating team grows to more than a dozen detectives, bringing petty jealousies and rivalries. Mowbray's boss, Detective Chief Superintendent Derek Henderson, keeps the pressure on as it becomes clear that the latest killing will not be the last. With little clue or pattern to suggest the killer's identity, the team races against time to find the predator before he strikes again. Mowbray's main sidekick is DC Jim Boulter, a no-nonsense detective who often comes close to crossing the line when interrogating suspects. Chapman's team includes WPC Margaret Walkinshaw, a rookie officer, and DCs Mickey Lloyd and Phil Leighton. Fowler's team includes DC Linda Harris and DC Trevor Richard. Henderson's main adversary, Detective Chief Superintendent Huw Owen, is the initial investigating officer; when Owen nearly blows the investigation, Stocks replaces him with Henderson. Henderson later nearly gets sidelined until the team identifies Robert Jackson as the prime suspect.