Six-part thriller series from Francis Durbridge. When a famous athlete (Anthony Sagar) dies on a golf course, his detective son Jack (Gerald Harper) supects murder, despite the coroner's misadventure verdict. In pursuit of the facts and events behind his death, Jack embarks on a murder hunt that takes him into the seedy underworld of the Soho red-light district. As the body count rises Jack's suspicions are proved correct but will he be able to discover the mystery behind it all?

John Thaw stars in this 1960s drama series written by Francis Durbridge. The series follows lovers Mark (Thaw) and Diana (Sylvia Sims) who wish to be together but Diana's husband Geoffrey (Noel Johnson) refuses to grant her a divorce. Realising their only way to happiness is to murder Geoffrey, Diana shoots her husband and Mark arrives to help her dispose of the body. When the body disappears, however, Diana receives a phone call from her husband blackmailing her to meet him or be arrested for attempted murder.