Two youths throw bricks from a walkway bridge and hit a police car, killing an officer. Stafford deals with the subsequent unrest on a housing estate.

A child playing on a beach is poisoned by spillage from an oil tanker. Stafford is ordered to evict a group of environmental protesters from a ship carrying toxic waste.

Stafford becomes Head of Europol, but the position gives him plenty of free time, so the Home Office asks him to tackle corruption within the Metropolitan Police as Alan Cade arrives. Anne has a promotion board for DCC, while also dealing with a major firearms incident in Norfolk.