A D.S. from the Drug squad is looking for the D.C.I. Cathy recognises him. He is interested in Cathy and follows her on her beat as she checks a domestic. He turns out to be her ex-husband who wants her back. The wife involved in the domestic had been beaten regularly before she stabbed her husband. Quinnan is mouthing off in the canteen and Cathy takes offense. Later Dave wants to patch things up with her. When Dave goes to the hospital he comes across Cathy being threatened by her ex who takes a swing at Dave.

While on foot patrol on the Jasmine Allen estate, PC Jim Carver contends with an elderly man, Ronnie Atkins, who wants to deal with the local youths ""his way"". When Atkins' best friend, Len Harrap, is found having fallen from the top of the building, Carver suspects foul play and investigates further. Harrap's GP tells him that Len was recently suffering from Post-Traumatic Stress Disorder, and that he had served with British forces during the Korean War. When a man matching the description of the association secretary, Charles Barratt, is reported to have left Len's flat, Atkins realises what has happened. Barratt was a corporal in their platoon during the war, and had forced Len at gunpoint to murder surrendered Chinese soldiers. When Len's daughter put his name up for the reunion, Barratt realised this was his chance to get rid of the photographic evidence of his war crime. Carver admits it will be difficult to get the CPS to prosecute Barratt, especially now the photographs are mis