Full Credits
13 members

Lloyd Bridges
Dr. Doug Standish
Brian Kelly
Dr. Craig Mosby

Shirley Eaton
Dr. Margaret E. 'Maggie' Hanford

David McCallum
Dr. Philip Volker

Keenan Wynn
Hank Stahl

Marshall Thompson
Dr. Orin Hillyard

Gary Merrill
Dr. August 'Gus' Boren

Ron Hayes
Brinkman
George Shibata
Prof. Uji Hamaru
Donald Linton
Vice President
Frank Logan
Captain of the Diligence
Don Wells
Sonar Man on the Dilligence

Celeste Yarnall
Secretary
13 members
Andrew Marton
Director
Arthur Weiss
Writer
Art Arthur
Writer
Ivan Tors
Producer
Andrew Marton
Producer
Ben Chapman
Associate Producer
Clifford H. Poland Jr.
Director of Photography
Harry Sukman
Original Music Composer
Preston Rountree
Art Direction
Max Pittman
Set Decoration
Mel Bledsoe
Art Direction
Jim Danforth
Visual Effects
Warren Adams
Editor