A Norwegian scientist builds a device that can convert sound waves into electrical energy. However, the machine is stolen by the scientist's wife and assistant, who head across the frozen tundra towards Russia. A police inspector and a local girl team up with the scientist to help recover the device.
Jack Warner
as Inspector Peterson
Nadia Gray
as Kara Niemann
John McCallum
as Dr. Nils Ahlen
Anthony Dawson
as Sven Nystrom
Mary Laura Wood
as Helga Ahlen
Naima Wifstrand
as Baroness Erland
Norman MacOwan
as McTavis, ferry pilot
Christopher Lee
as Det. Holt
Alfred Maurstad
as Trerik
Martin Boddey
as Chief of the Lost Valley
Ewen Solon
as Det. Anderson
Gösta Cederlund
as Prof. Lind
