- Barbara Morris Davisonthe book "Secrets of the Gods adapted from the film"
- Donn Davisonwriter
- Gerald Noven(as Captain Gerald Noven)
- Don Elkins(as Professor Donald Elkins)
- Ed Herlihy(archive sound)
- George Wald(as Professor George Wald)
- Peter Roberts(archive sound) (voice)
- Joe King(archive sound) (voice)
- Gregory Abbott(archive sound) (voice)
- Linda Sole(as Mrs. Linda Sole)
- Jim Lorenzen(as Jim Lorenson)
- Coral Lorenzen(as Coral Lorenson)
- Colman von Keviczky(as Colman Von Koviczky)
- Leo Sprinkle(as Dr. Leo Sprinkle)
- John Walsh(as Lieutenant John Walsh)
- George Kloss(as Detective George Kloss)
Rest of cast listed alphabetically
- Donn Davisonproducer
- Edward L. Montoroexecutive producer
- Ralf D. Bodecinematographer (as Ralf Bode)
- David Fallonproduction manager
- John Caddyre-recording mixer
- Raymond Diazboom operator: second unit
- Thomas A. Fuzzisound editor
- Phil Pearlesound recordist: second unit (as Philip Pearle)
- Larry Praxarsound recordist
- John Biellogaffer: second unit
- Lenore Bodeassistant camera: second unit
- John Buddelighting technician / still photographer
- Steven Gordonalternate gaffer / grip
- Kim Whitmoreassistant camera
- Kit Whitmoreassistant camera
- David B. Cohnassistant editor (as David Cohn)
- Margaret Sachsscript supervisor
- Steve Brandproduction assistant
- G.W. Brown Jr.technical advisor (as Dr. G.W. Brown Jr.)
- Gregory Burtonproduction assistant
- Peter Byrnetechnical advisor
- Barbara Morris Davisonresearcher (as Barbara Davison)
- Donn Davisonresearcher
- Don Elkinstechnical advisor (as Prof. Don Elkins)
- Virginia Fieldresearcher
- Ernest Johntechnical advisor
- Bernard O'Connortechnical advisor
- Karl L. Velt Duistthe producers wish to thank: West Germany
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