When it emerges that heart attack victim William Burford has videotaped a murder, Paul Dangerfield and Ken Jackson are faced with a complex moral dilemma. Deciding it best to protect the dead man's wife Lesley and their kids Claire and Michael because he was clearly a 'Peeping Tom', Jackson destroys the videotape. However his actions come back to haunt him when he later learns from Paul that a murdered woman, Susan Wainwright, might have been on the video. Meanwhile closer to home, Alison is worried about her brother Marty and heads off to Wales to find him.
