Mac McGill (Richard Bradford, The Untouchables) is an ex-spy with a murky past and an uncertain future. Wrongfully dismissed by his bosses in U.S. intelligence, he decides to freelance as a private detective based out of London. McGill's work takes him far and wide, yet seemingly always on a collision course with the British authorities, the Soviets, and his old colleagues in American espionage. Beset by enemies on all sides, he strives to clear his name and restore his reputation. But until he does, he remains on the run, taking jobs in the dark and dangerous corners of European society. This action-packed Cold War drama aired on ABC in the late 1960s and features savvy writing and a host of superb guest stars, including Donald Sutherland (Pride & Price), James Grout (Inspector Morse), Anton Rodgers (Lillie), Nicola Pagett (Upstairs, Downstairs), Peter Vaughan (The Remains of the Day), Stuart Damon (General Hospital), and Judy Geeson (Mad About You).