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