Col. Robert Calder
Marisa Leonardo
Dr. Leonardo
Dr. Judson Uhl
Maj. Gen. A.D. McIntosh (as Thomas B. Henry)
Commissario Unte
Signore Contino
Dr. Sharman
Pepe (as Bart Bradley)
Farmer (uncredited)
Technician (uncredited)
Police Officer (uncredited)
1st Reuters News Correspondent (uncredited)
Miss Reynolds (uncredited)
Fisherman (uncredited)
Minor Role (uncredited)
Man Feeding Elephant (uncredited)
Policeman Shooting Flamethrower (uncredited)
Verrico (uncredited)
Blonde in window (uncredited)
Villager (uncredited)
Dr. Blankford (uncredited)
Dr. Koruku (uncredited)
Mondello (uncredited)
Maples (uncredited)
Felix Roi (uncredited)
American Embassy Aide (uncredited)
Opening Narrator (voice) (uncredited)