An atomic explosion awakens Gammera, a giant fire breathing turtle monster from his millions of years of hibernation.
Albert Dekker
Brian Donlevy
Diane Findlay
John Baragrey
Dick O'Neill
Eiji Funakoshi
Michiko Sugata
Harumi Kiritachi
Mort Marshall
Bob Carraway
Alan Oppenheimer
John McCurry
Steve Zacharias
Walter Arnold
Thomas Stubblefield