One of these men is working for the C.I.A.
Vlassov is a Soviet spy who defects in France. He is whisked to the U.S, where Allan Davies takes over the case. After polygraph tests and cross-examinations, Vlassov names several Western European agents who are also spying for the Soviets. Davies wants to take the listed agents into custody; meanwhile, those on the list start dying under mysterious circumstances.
Director: Henri Verneuil
Screenplay: Gilles Perrault, Henri Verneuil
Producer: Henri Verneuil
Director of Photography: Claude Renoir
Col. Alexi Vlassov
Alan Davies
Philip Boyle
Mrs. Annabel Lee
Polygraph interrogator
Computer Programming Director
Lucien Berthon
Tavel