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.
Yul Brynner
Col. Alexi Vlassov
Henry Fonda
Alan Davies
Dirk Bogarde
Philip Boyle
Virna Lisi
Mrs. Annabel Lee
Robert Alda
Polygraph interrogator
Farley Granger
Computer Programming Director
Philippe Noiret
Lucien Berthon
Michel Bouquet
Tavel
