Maureen Mulcahy was a 23-year-old single mother of two, living with her parents on a council estate in Aberavon. On Saturday 21 February 1976, Maureen went out drinking with a friend. At 11:30pm, she was dropped off outside the Green Meadow pub to meet somebody. What happened next is unknown, but Maureen’s body was found the following morning by a man walking his dog behind Aberavon Rugby Club. Maureen had been strangled, and although her clothes were disturbed, there was no evidence of sexual assault. Initially, the investigation was focused on the pub, which was full of migrant workers and local men celebrating the Welsh rugby team’s recent victory over Ireland. In total, the police interviewed over 1,000 men, but few suspects emerged, and the case went cold. In this episode of Dark Land, the team attempts to solve the crime that has cast a shadow over Aberavon for many decades. In a major breakthrough, the team discovers clues that suggest Maureen may have been the victim of a serial killer. And a new witness comes forward and breaks a silence of 30 years with a shocking new testimony.