Webb and Walker investigate when a campaign of harassment and hate-mail leads Keith Durante's wife Louise to try and commit suicide. Webb manages to track down the anonymous neighbour who alerted the police, but he refuses to identify of those involved - until it becomes apparent that the father of one of Durante's victims may be involved. Meanwhile, Hollis and Stamp are annoyed when Smithy gives them the case of investigating a dog-napping - until Hollis' persistence with the case leads to the discovery of a lead into a missing persons case - and possibly even a murder. However, Stamp is distracted when his father is admitted to hospital with a serious chest infection.
