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.
Unfortunately the movie Gamera vs. Viras is not yet available on HBO Max.
| Editing | Shoji Sekiguchi | Editor |
| Crew | Yuzo Kaneko | Special Effects |
| Art | Tomohisa Yano | Production Design |
| Crew | Kazufumi Fujii | Special Effects |
| Directing | Noriaki Yuasa | Director |
| Writing | Nisan Takahashi | Writer |
| Production | Hidemasa Nagata | Producer |
| Production | Masaichi Nagata | Executive Producer |
| Sound | Kimio Tobita | Supervising Sound Editor |
| Camera | Akira Kitazaki | Director of Photography |
| Sound | Kenjiro Hirose | Original Music Composer |
