Someone is knocking off top atomic scientists in England. Scotland Yard is summoned to stem the carnage and find the killer. The solution involves the activities of Communist agents operating with the ranks of the scientists. American actor Richard Conte is top-billed, primarily as a means to get the film into US theatres--a box office strategy frequently employed by director Ken Hughes. The original British title of this fast-paced whodunit was Little Red Monkey. ~ Hal Erickson, Rovi