All Cast
Jack Warner
Inspector Peterson
Nadia Gray
Kara Niemann
John McCallum
Dr. Nils Ahlen
Anthony Dawson
Sven Nystrom
Mary Laura Wood
Helga Ahlen
Naima Wifstrand
Baroness Erland
Norman MacOwan
McTavis, ferry pilot
Christopher Lee
Det. Holt
Alfred Maurstad
Trerik
Martin Boddey
Chief of the Lost Valley
Ewen Solon
Det. Anderson
Gösta Cederlund
Prof. Lind
Sten Lindgren
Director-General of the Reasearch Institution
