After a man attacks and kills his mother with a hammer, detectives investigate his behaviour leading up to the attack.

When two women are stabbed in a domestic attack, a man claims self-defence. But his injured partner has recovered enough to give her account.

After a delivery driver is ambushed and beaten to death in broad daylight, detectives from West Mercia Police begin a major manhunt to track down his killers.

A mother and daughter are found with serious stab wounds in Worcester. The daughter’s partner claims he did it in self-defence. Detectives must unravel what really happened.

The investigation into the murder of Courtney Valentine-Brown concludes.

A manhunt ensues when one suspect names another.

The critical first two days of the investigation into the murder of a man in his flat.

Detectives and specialists investigate a double stabbing in Colchester.

With the suspected inside man arrested, detectives must prove he knew he was setting up a murder. A new investigation begins when a man tries to kill himself and his learning-disabled son.

Episode five continues to follow the investigation into the killing of Carl Hopkins.

With four men arrested for delivery driver Aurman Singh’s murder, detectives work to find the weapons used and try to identify an inside man they believe helped to plan the ambush.