|James Mason||Charles Dobbs|
|Simone Signoret||Elsa Fennan|
|Maximilian Schell||Dieter Frey|
|Harriet Andersson||Ann Dobbs|
|Harry Andrews||Inspector Mendel|
|Kenneth Haigh||Bill Appleby|
English secret agent Charles Dobbs is shocked to discover that a government official whom he knew has committed suicide. Suspicious circumstances soon point to the death being a murder, and Dobbs investigates further, contacting the victim's wife, Elsa Fennan, a survivor of a concentration camp. Despite pressures from senior officials to leave the case, Dobbs continues, hiring veteran cop Inspector Mendel to dig deeper.