Episode 1

The series begins with a woman who has been brutally stabbed in her home in Leeds. Over the course of the critical next few hours the teams and blood-analysis experts meticulously assess the scene to establish what might have happened and report back to the detectives investigating the case.

Episode 2

A close range shotgun attack in a West Yorkshire newsagents sends tremors through the community. Forensic teams must assess the evidence and help the prosecution pursue the case to court.

Episode 3

A recycling plant in Yorkshire is the scene of a gruesome discovery when an intact human foot is found among the waste. Who does it belong to? Is it a murder case? And who's responsible?

Episode 4

Forensics are called to a terrifying scene at a family home: 33-year-old man has been fatally stabbed in his kitchen. Police embark on a huge manhunt to find who is responsible.