"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.
Col. Alexi Vlassov

Alan Davies

Philip Boyle

Mrs. Annabel Lee

Polygraph interrogator

Computer Programming Director

Lucien Berthon

Tavel

Lepke

Deval

Suzanne

Kate Cross

French Diplomat

Mercadier

inspecteur Joss

Jeannine Santelli

Gardener

Mrs von Strelitz

Lefèvre

Debecourt

Tatiana Vlassov

Narrator (voice) (uncredited)
