The Human Factor

In this gripping 1979 neo-noir thriller, Nicol Williamson stars as Maurice Castle, a British intelligence officer whose seemingly unremarkable life is turned upside down when his department is rocked by a mysterious information leak. As MI6 scrambles to identify the mole, Castle's world is further complicated by his own troubled past and his duty to protect his wife and son from the clutches of Soviet agents, who have taken a keen interest in his defection.