The Deadly Affair

"The Deadly Affair" is a 1967 British spy film about Charles Dobbs (James Mason), a staid MI6 operative investigating Foreign Office official Samuel Fennan's apparent suicide. Dobbs becomes suspicious about the cause of Fennan's death after visiting his widow, Elsa Fennan (Simone Signoret), and discovers she may be hiding clues about her husband's death. As Dobbs delves deeper into the case, he uncovers a network of East European agents, including Dieter Frey (Maximilian Schell), who is revealed to be both an old friend and Elsa's control.