Cast
Michael Rennie
Lord John Roxton
Jill St. John
Jennifer Holmes
David Hedison
Ed Malone
Claude Rains
Prof. George Edward Challenger
Fernando Lamas
Manuel Gomez
Richard Haydn
Prof. Summerlee
Ray Stricklyn
David Holmes
Jay Novello
Costa
Vitina Marcus
Native Girl
Ian Wolfe
Burton White
Colin Campbell
Prof. Waldron (uncredited)
John Graham
Stuart Holmes (uncredited)
Larry Chance
Indian Chief (uncredited)
Bert Stevens
Reporter at Airport (uncredited)
Al Bain
Man at Airport (uncredited)
Bess Flowers
Guest at Zoological Institute Forum (uncredited)
Kenner G. Kemp
Guest at Zoological Institute Forum (uncredited)
Cosmo Sardo
Guest at Zoological Institute Forum (uncredited)
Murray Pollack
Guest at Zoological Institute Forum (uncredited)
Crew
Irwin Allen
Screenplay
Irwin Allen
Producer
Joseph Kish
Set Decoration
Paul Sawtell
Original Music Composer
John Sturtevant
Set Decoration
Hugh S. Fowler
Editor
Duncan Cramer
Art Direction
Walter M. Simonds
Art Direction
Paul Zastupnevich
Costume Design
Ben Nye
Makeup Artist
Helen Turpin
Hairstylist
Irwin Allen
Director
Charles Bennett
Screenplay
Bert Shefter
Original Music Composer
Walter M. Scott
Set Decoration
Winton C. Hoch
Director of Photography
Ad Schaumer
Assistant Director
Arthur Conan Doyle
Novel
Willis H. O'Brien
Visual Effects
