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.
| Directing | Ishirō Honda | Director |
| Production | Henry G. Saperstein | Producer |
| Production | Tomoyuki Tanaka | Producer |
| Editing | Ryôhei Fujii | Editor |
| Writing | Reuben Bercovitch | Story |
| Production | Kenichiro Tsunoda | Executive Producer |
| Sound | Akira Ifukube | Original Music Composer |
| Art | Takeo Kita | Production Design |
| Production | Reuben Bercovitch | Executive Producer |
| Writing | Ishirō Honda | Writer |
| Writing | Takeshi Kimura | Writer |
| Crew | Hajime Koizumi | Cinematography |
| Production | Shoichi Koga | Production Manager |
| Production | Richard Krown | Production Supervisor |
| Directing | Kôji Kajita | Second Unit Director |
| Art | Tôru Narita | Art Designer |
| Sound | Sadamasa Nishimoto | Sound Effects Editor |
| Crew | Yasuyuki Inoue | Special Effects |
| Crew | Fumio Nakadai | Special Effects |
| Crew | Teruyoshi Nakano | Special Effects Assistant |
| Crew | Yasuaki Sakamoto | Special Effects |
| Crew | Eiji Tsuburaya | Special Effects Manager |
| Visual Effects | Eiji Tsuburaya | Visual Effects |
| Sound | Norio Tone | Sound Recordist |
