Season 1
Episode: 1x01 | Airdate: Jun 4, 2019
This episode investigates the disappearance of Julie Reilly, a 47-year-old mother of one who was reported missing in March 2018. After an extensive four-week-long search fails to find her, the skilled investigators of Police Scotland's major investigations team take up the case. A set of suspicious circumstances and a horrific forensic discovery lead them to a suspect. The detectives now need to find Julie's body and gather enough evidence to charge and ultimately convict him.
Episode: 1x02 | Airdate: Jun 11, 2019
This episode sees the Police Unit's number one suspect in the disappearance of Julie Reilly, under interrogation.
His interview leads to frustration for Julie's family and the detectives. They need to gather more evidence to convict him, but with no body it takes all their skill to prove guilt and charge their suspect.
Episode: 1x03 | Airdate: Jul 9, 2019
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.
Season 2
Episode: 2x01 | Airdate: Oct 6, 2020
The detectives investigate the case of 37-year-old Paul Mathieson, who was brutally assaulted and found fighting for his life on a street in Renfrew.
Episode: 2x02 | Airdate: Oct 13, 2020
Police Scotland's major investigation teams deal with around 60 murders a year. This episode delves deeper into the nature of the job. Through reconstructions and interviews with both senior and rookie detectives, the film reveals what it is like to work on such devastating cases.
Season 3
Episode: 3x01 | Airdate: Jan 21, 2025
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.
Season 4
Episode: 4x01 | Airdate: Aug 12, 2025
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.
Episode: 4x02 | Airdate: Aug 19, 2025
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.