20/03/1968
As alien invaders plot to conquer the Earth, two Boy Scouts steal a mini-submarine and discover Gamera in their midst. Transported to the alien's spaceship, the Scouts are menaced by the evil inhabitants, including Viras, a squid-like monster that grows to colossal size to battle Gamera.
Kōjirō Hongō
as Scout Master Mr. Shimida
Tôru Takatsuka
as Masao Nakaya
Carl Craig
as Jim Morgan
Michiko Yaegaki
as Mariko
Peter Williams
as Dr. Dobie
Kōji Fujiyama
as Self-Defense Force Commander
Mari Atsumi
as Junko Aoki
Junko Yashiro
as Masako Shibata
Yoshirō Kitahara
as Masao's Father
Munehiko Takada
as Jim's Father
Mary Morris
as Jim’s Mother
Chikara Hashimoto
as Doctor 1
Kenji Go
as Doctor 2
Shō Natsuki
as Doctor 3
Ken Nakahara
as Doctor 4
Kenichiro Yamane
as Doctor 5
Genzô Wakayama
as Boss (voice)
Teruo Aragaki
as Gamera
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