Director
Terence Young
DIRECTOR
Stars (in credits order)
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
Alfred Maurstad
Trerik
Martin Boddey
Chief of the Lost Valley
Christopher Lee
Det. Holt
Ewen Solon
Det. Anderson
Gösta Cederlund
Prof. Lind
Sten Lindgren
Director-General of the Research Inst.
Kurt-Olof Sundström
ACTOR
Peter Blitz
Anders
Fritiof Billquist
Colonel Strand(uncredited)
Sarah Crawford
Noma(uncredited)
Holger Kax
Minor Role(uncredited)
Natasha Sokolova
Molly Warner
Frau Lind(uncredited)
George Willoughby
Bertil(uncredited)