British intelligence officer is sent to investigate an anonymous letter sent to the foreign secretary accusing a key officer of communist affiliation. When the officer commits suicide, the investigator suspects murder and presses his inquiry. The culprit is finally exposed in a surprise climax.

Medvirkende

Simone Signoret

James Mason

Harriet Andersson

Maximilian Schell

Sidney Lumet

Sidney Lumet

Vis flere