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
Peter Blitz
Anders
Fritiof Billquist
Colonel Strand (uncredited)
Sarah Crawford
Noma (uncredited)
Molly Warner
Frau Lind (uncredited)
George Willoughby
Bertil (uncredited)
Crew
Costume & Make-Up
George Blackler
Makeup Artist
Editing
Lito Carruthers
Editor
Production
Nat A. Bronstein
Producer
