Other titles: Gammera – O Monstro Invencível | Gammera invincibilul | Gamera the Invincible | Gammera
Year Released: 1966
Month released: December
Certification: United States:Unrated
Cast: Alan Oppenheimer, Albert Dekker, Bernie Grant, Bob Carraway, Brian Donlevy, Corinne Orr, Diane J. Findlay, Dick O'Neill, Eiji Funakoshi, Gene Bua, George Hirose, Harumi Kiritachi, Jack Curtis, John Baragrey, John McCurry, Louis Zorich, Michiko Sugata, Mort Marshall, Peter Fernandez, Robin Craven, Steffen Zacharias, Teruo Aragaki, Thomas Stubblefield, Walter Arnold, Yoshiro Uchida
Additional Crew: Bob Sessions, Bob Sherman, Constantine Gregory, Fran Wolf, Garrick Hagon, Jay Benedict, Jesse Vogel, L. Jeffery Norwalk, Liza Ross, Noriaki Yuasa, Robert Myerson, Sean Barrett
Certification: United States:Unrated
Colorization: Black and White
Distributors: Alpha Video Distributors, Harris Associates, Mill Creek Entertainment, Sinister Cinema, Something Weird Video (SWV), Synergy Entertainment, Video Yesteryear, World Entertainment Corp.
Languages: English
Script and Continuity Department: Barbara Robinson
Sound Department: Murray Rosenbloom