Stafford returns from suspension and is immediately called upon to deal with a series of bomb threats by animal rights activists.

A hitchhiker is kidnapped, and Stafford has to deal with an ensuing siege. Stewart contends with vigilante security guards working on a private estate.

Stafford continues to deal with the siege at the hospital. A female officer resigns from the force, citing sexual harassment. Stewart's husband, Martin, walks out on her.

Stafford considers whether to allow the screening of a controversial documentary about BSE. Stewart gets into hot water.

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.

Stafford's corruption inquiry reaches a successful conclusion, and the officer who assisted him with the case is appointed as Eastland's new chief constable.

An American gas rig is hijacked on Alan Cade's first day, but will his choice of negotiator pay off?

A hospital lab tech implicates a local councillor in illegal practices. When he believes his accusations are being ignored, he dramatically breaks through the cordons during a royal visit to a school concert.

Cade allows an informant to orchestrate a drug deal while investigating a smuggling ring, only to find it led to his death.

When Cade is threatened with an investigation over the death of the informer, his team closes ranks. The Home Office, preferring to have a hold on its maverick chief constable, decides not to act.

Cade is the subject of public outrage after two terrorist bomb blasts, and, as if that were not enough, his girlfriend leaves him.

Davies discovers that a bogus doctor has been using NHS equipment to carry out his private business. Cade has to organise a massive security operation to protect a royal visitor.

Stewart is disillusioned and frustrated when she fails to win the promotion for which she has been fighting.

Impressed by her diligence, Cade agrees to employ pushy PR exec Alison Dell in an attempt to boost the force's image. However, they soon find that their working relationship spills over into their private lives.

Hilary Scott is attacked by anti-abortionists on her way to the clinic. Terrified by their campaign, she goes home to rethink her decision.

Cade causes controversy when he announces a radical plan to decriminalise certain drugs for an experimental trial.

Cade's life is jeopardised when a visiting Italian judge falls victim to an assassination attempt.

Tensions between the police and the Crown Prosecution Service mount following the acquittal of a child murderer.

Cade is forced to defend his team when an undocumented immigrant dies during attempts to detain him.

Cade's attitude on firearms is challenged after an armed robbery on a countryside mansion.

Cade faces a dilemma after a child is killed by joyriders on a local estate.

Two deadly incidents of racial hatred, more than twenty years apart, cause problems for Cade.

Cade leans on an old friend when he suspects the others are conspiring against him.

Emotions run high when charges of harassment are brought within – and against – the Eastland force.

Cade's future is in doubt when he comes under fire from the tabloid press.