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1. Bölüm Bulman, Willis and Doran are undercover at the docks trying to identify the ringleaders in a series of bicycle thefts. Back at the office, Rainbow is displeased with their methods. After an accident on the quay, Bulman starts to get romantic ideas about the lady doctor.
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2. Bölüm When Bulman successfully infiltrates a gang of villains, it isn't long before he finds himself on the run from the police — and desperately in need of the assistance of his undercover colleagues.
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3. Bölüm When counterfeit Deutschmarks flood Germany and the officers try to establish a connection in England, they find themselves facing violent and ruthless opposition from a murderous gang.
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4. Bölüm When a successful businessman begins receiving blackmail threats, the squad expect a straightforward case. However, they discover far more than they bargained for and learn that people in high places prove to be bad losers.
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5. Bölüm Bulman's dedication to duty is so inense that he tries to arrest Carmos, a psychopathic killer, during his wedding, The squad must use all their ingenuity to extricate him from the villain's clutches — Bulman is wounded and in danger of dying.