Season 4

Regan and Carter have a suspect in mind for the theft of a consignment of mercury, but he has an alibi.

Regan and Carter are reluctantly teamed up with a Scottish officer.

The Sweeney get incorrect information from informants, allowing a gang of villains to make off with some contraband alcohol.

After a criminal dies during a robbery, Regan and Carter can find no leads.

Regan's girlfriend has a nightmare that has similarities to a deadly incident.

Regan and Carter try to catch a man trying to blackmail a pools winner about the part he played in a robbery.

Regan is determined to nail a modern-day Bonnie and Clyde.

Regan discovers that successful people will stop at nothing to keep skeletons buried.

Regan is asked to help a criminal from his past, whose son has been kidnapped.

Carter winds up behind bars in an attempt to solve a jewellery robbery.

Regan and Carter get caught up in a plot to prevent a foreign head of state from getting his hands on an experimental drug to treat his heart condition.

A rich gynaecologist is attacked by a gang of villains who rob him of his suitcase.

Carter discovers that an informant was involved in the shooting of a colleague.

Regan finds himself in deep trouble when an allegation of corruption is made by the Police Complaints Department. A security van is robbed, and a guard identifies one of the robbers.