Het genetisch gemanipuleerde monster Gargantua ontsnapt uit een laboratorium en krijgt al gauw de schuld van de vernielingen die in Japan werden aangericht. Er blijkt echter nog een tweede Gargantua te bestaan en al gauw komen de twee monsters elkaar tegen.
Nee, helaas is フランケンシュタインの怪獣 サンダ対ガイラ nog niet beschikbaar op Netflix in Nederland.
| Editing | 藤井良平 | Editor |
| Sound | 伊福部昭 | Original Music Composer |
| Directing | 本多猪四郎 | Director |
| Production | 田中友幸 | Producer |
| Production | Kenichiro Tsunoda | Executive Producer |
| Art | 北猛夫 | Production Design |
| Writing | Reuben Bercovitch | Story |
| Production | Henry G. Saperstein | Producer |
| Production | Reuben Bercovitch | Executive Producer |
| Writing | 本多猪四郎 | Writer |
| Crew | 中野昭慶 | Special Effects Assistant |
| Art | Tôru Narita | Art Designer |
| Writing | 馬淵薫 | Writer |
| Crew | 井上 泰幸 | Special Effects |
| Crew | 坂本 泰明 | Special Effects |
| Sound | Sadamasa Nishimoto | Sound Effects Editor |
| Crew | 小泉一 | Cinematography |
| Production | Richard Krown | Production Supervisor |
| Crew | Fumio Nakadai | Special Effects |
| Production | Shoichi Koga | Production Manager |
| Crew | 円谷英二 | Special Effects Manager |
| Visual Effects | 円谷英二 | Visual Effects |
| Sound | Norio Tone | Sound Recordist |
| Directing | 梶田興治 | First Assistant Director |
