On screen
Cast
13 credited performers
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
Artwork unavailable
George Shibata
Prof. Uji Hamaru
Artwork unavailable
Donald Linton
Vice President
Artwork unavailable
Frank Logan
Captain of the Diligence
Artwork unavailable
Don Wells
Sonar Man on the Dilligence
Celeste Yarnall
Secretary