A moon base is destroyed by a spaceship from Zigra which is looking to take over the planet earth to use its oceans for its ocean-dwelling denizens. Gamera must once again come to the aid of the human race while all of Japan roots him on.
八並映子
as Woman X / Chikako Sugawara
笠原玲子
as Kiyoko Ishikawa
坪内ミキ子
as Mrs. Ishikawa
藤山浩二
as Dr. Tom Wallace
Isamu Saeki
as Dr. Yosuke Ishikawa
三夏紳
as Sea World Staff
Arlene Zoellner
as Margie Wallace
Gloria Zoellner
as Helen Wallace
坂上也寸志
as Keinichi Ishikawa
野田圭一
as Zigra (voice)
