Several murders of nuclear scientists, that baffles Scotland Yard, occur in London around the same time that Bill Locklin, a special officer from the United States State Department, arrives to oversee the transfer of Professor Leon Dushenko, a Russian scientist who has fled the USSR. An attempt on Dushenko's life is made with a monkey's paw-print found at the scene.
Richard Conte
Rona Anderson
Russell Napier
Sylva Langová
Colin Gordon
Donald Bisset
John King-Kelly
Bernard Rebel
Arnold Marlé
John Horsley
Jane Welsh
Aimée Delamain