This episode starts with the interrogation of the number one suspect. With no body, it takes all the detectives' skill to prove the case and charge their suspect.
Forty-six-year-old Stephen Wallace is found dead in his Paisley home from a number of injuries. The detectives forensically comb the crime scene for clues which will lead them to his killer.
Detectives take on a decades-long mystery when they reinvestigate the 1984 murder of Mary McLaughlin. A new suspect comes to the fore, but it raises more questions than answers.
While embarking on a charity cycle ride, 63-year-old former navy officer Tony Parsons vanishes without a trace. This astonishing case unravels in ways no-one could predict.
With unprecedented access to the police investigation and criminal trial, the shocking truth of what really happened on the night Tony Parsons disappeared is discovered.
In the Highland town of Elgin, detectives face a challenging investigation as they work tirelessly to uncover the truth behind Kiesha Donaghy’s brutal murder.