Series 4

01 The Moscow Subway Murders Episode 125th September 1981 Now promoted to Detective Chief Inspector, Bulman, frustrated with the office-bound nature of the job, is soon challenged by an intriguing murder case. 02 The Loneliness of the Long Distance Copper Episode 22nd October 1981 A convict makes a daring prison break but leaves a trail to ensure his recapture is handled by the inter-city squad. He has an old score to settle with supervisor Lambie. 03 A Dear Green Place Episode 39th October 1981 A routine assignment — escorting a prisoner from Glasgow to London — turns into something altogether different when the woman escapes and her escorts on a merry cross-country chase. 04 Stand and Deliver Episode 416th October 1981 The squad investigates a series of armed robberies committed by a gang of modern-day highwaymen. 05 The Flowers of Edinburgh Episode 523rd October 1981 Bulman and Willis arrest a man carrying an incriminating roll of film. This triggers off an enquiry which takes them to Edinburgh, where they tangle with a gang specialising in political blackmail. 06 Soldiers of Misfortune Episode 630th October 1981 The squad investigates a murder and a series of knee-cappings committed by rival groups of mercenaries.