In July 1978, the city of Aberdeen was rocked when Dr Brenda Page was found bludgeoned to death in her West End home. Initial police forensic work undertaken by Eric Jenson uncovered unusual paint flecks at the crime scene. These were later linked to Brenda's abusive ex-husband Kit Harrisson, but charges could not be brought, and the case went cold. In the early 2000s, forensic biologist Chris Gannicliffe is asked to re-examine the evidence for a cold-case review. Chris undertook a full re-examination of hundreds of original exhibits from the crime scene. Utilising cutting-edge analytic techniques on a stained bedsheet led to the discovery of new DNA evidence. Chris's work would provide a solid link to the original suspect Kit Harrisson and result in Harrisson being found guilty of Brenda's murder 45 years after her death. In North Yorkshire, a woman is found dead in the home she shared with her husband above a post office. Her husband claimed that she had been held hostage for a certain amount of time, but that really didn't fit the timeframe of events. Police ask expert witness, blood pattern analyst Jo Millington, for help. She proved that the direction of blood at the crime scene meant there may never have been a break-in, and the victim's husband was convicted of her murder.