Callan (1970) The Same Trick Twice (S3E3)

Callan is a British drama espionage television series, which originally aired between 1967 and 1972. It features Edward Woodward as David Callan, an agent of a state secret service dealing with internal security threats to the United Kingdom. The Same Trick Twice (S3E3): Surtees, a British agent recently returned in a prisoner exchange, threatens to publish an explosive tell-all account of his activities, complete with scandalous details. Suspecting that the KGB has turned Surtees, Hunter orders Callan to stop him. It features Edward Woodward, William Squire, Patrick Mower, and Russell Hunter.