Det. Con. Willis investigates a diamond robbery, while Det. Sgt. Bulman and Det. Con. Doran are on the trail of some men who have been beating up nightclub hostesses.
Bulman and Willis investigate the theft of a mailbag from a postman.
Bulman goes undercover in a betting shop, while Doran gains employment with a professional gambler.
The Unit investigates the death of a newspaper journalist. Doran goes under cover at the newspaper, while Willis helps out at the coroner's office.
Bulman dons a uniform and accompanies Sgt. Briscoe on the beat to investigate allegations against the officer.
D.C. Willis and W.D.C. Doran go undercover as a married couple to investigate a local politician suspected of engaging in illegal financial transactions.
D.S. Bulman and Briscoe have to protect the family of a key witness.
The squad investigate some odd occurrences at a dockyard.
Bulman infiltrates a gang of villains, but soon finds himself on the run from the police.
A flood of counterfeit Deutschmarks has hit Germany. The team investigates the English connection.
The squad investigate the blackmailing of a businessman.
The Unit attempts to arrest gangster Nick Carmos, but Bulman is wounded and abducted by Carmos and his friend Frank Revell while Willis and Bennett watch.
Bulman and the newly-promoted Det. Sgt. Willis are assigned to the new Inner City Squad, and investigate arms dealing in London.
Bulman and Willis investigate a widespread bank fraud.
Bulman and Willis escort a villain to London for questioning, but his partner will go to any lengths to ensure his silence.
Bulman and Willis go undercover to investigate a gang who are rigging the outcome of horse races.
Bulman is assaulted by a Polish diplomat. His investigations lead him to a Polish circus, where Willis and Bennett go undercover as backpackers.
Bulman goes undercover to break a Liverpool-based drug-smuggling ring.
Bulman and Willis are drawn into the world of arms-dealing and find that a professional hit man and Special Branch are also involved.
Bulman has been promoted and worries that he is going to be tied to the office. However, he is soon investigating a series of murders.
A man stages a prison breakout and takes D.C.S. Lambie's wife hostage, seeking revenge for the death of his brother.
Bulman, Willis and Bennett escort a female prisoner from Glasgow to London, but she is freed in the course of a staged car accident.
Willis and Bulman investigate a couple of modern-day highwaymen who are roaming the countryside on horseback and holding up tourist coaches.
Bulman and Willis join Bennett in Edinburgh to investigate the death of her informant.
The Inner City Squad tracks down a group of mercenaries in possession of a valuable piece of defence equipment.
Bulman and Willis trail an experienced hit man to ascertain his next target.
A group of businessmen kidnap a prominent politician. Bulman is suspended.
Bulman and Willis carry out an illegal search on a country house. Bennett goes under cover as a music journalist to get close to a jazz musician.
Bulman and Willis investigate the mysterious deaths of a number of extremist politicians.
The officers of the Inner City Squad take part in a weekend seminar on urban terrorism.
Inner City Squad go undercover in a jazz club to investigate an international smuggling ring.
The Inner City Squad investigates rival organisations involved in smuggling stolen art treasures. Bulman prepares for retirement.