An atomic explosion awakens Gammera, a giant fire breathing turtle monster from his millions of years of hibernation.
Albert Dekker
Secretary of Defense
Brian Donlevy
Gen. Terry Arnold
Diane Findlay
Sgt. Susan Embers
John Baragrey
Capt. Lovell
Dick O'Neill
Gen. O'Neill
Eiji Funakoshi
Dr. Hidaka
Michiko Sugata
Nobuyo
Harumi Kiritachi
Kyoke
