Steeltown Murders is based on the real-life manhunt which took place to catch the killer of three young women in the Port Talbot area and the remarkable story of how the mystery was solved almost 30 years later using pioneering DNA evidence. Glenister said: "When it’s based on something that is real and so traumatic because it involves three teenage girls, and having daughters myself, it hits you. Glenister said: "When it’s based on something that is real and so traumatic because it involves three teenage girls, and having daughters myself, it hits you