as Colonel Robert Calder
as Marisa Leonardo
as Dr. Leonardo
as Dr. Judson
as Maj. Gen. A.D. McIntosh
as Commissario Unte
as Signore Contino - Government Official
as Dr. Sharman
as Pepe
as Fisherman Mondello (uncredited)
as Fisherman Verrico (uncredited)
as Reporter Reynolds (uncredited)
as Reporter Maples (uncredited)
as Felix Roi, a French reporter (uncredited)
as Farmer (uncredited)
as Man Feeding Elephant (uncredited)
as 1st Reuters News Correspondent (uncredited)
as Dr. Koruku - Japanese Scientist