William Hopper
Colonel Robert Calder
Joan Taylor
Marisa Leonardo
Thomas Browne Henry
Maj. Gen. A.D. McIntosh
Tito Vuolo
Commissario Unte
Jan Arvan
Signore Contino - Government Official
Don Orlando
Fisherman Mondello (uncredited)
George Khoury
Fisherman Verrico (uncredited)
Darlene Fields
Reporter Reynolds (uncredited)
George Pelling
Reporter Maples (uncredited)
James Dime
Felix Roi, a French reporter (uncredited)
Sid Cassel
Farmer (uncredited)
Ray Harryhausen
Man Feeding Elephant (uncredited)
Noel Drayton
1st Reuters News Correspondent (uncredited)
Rollin Moriyama
Dr. Koruku - Japanese Scientist
