Discover

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
Art
J. Elder Wills
Art Direction
Costume & Make-Up
George Blackler
Makeup Artist
Crew
Arthur Alcott
Production Controller
Editing
Lito Carruthers
Editor
Production
Nat A. Bronstein
Producer