The Futurians, time-travelers from the 23rd century, arrive in Japan to warn them of the nation's destruction under Godzilla. They offer to help erase Godzilla from history by preventing his creation. With Godzilla seemingly gone, a new monster emerges as the Futurians' true intentions are revealed.

Katsuhiko Sasakias Professor Mazaki
Kosuke Toyoharaas Kenichiro Terasawa
Anna Nakagawaas Emmy Kano
Megumi Odakaas Miki Saegusa
Akiji Kobayashias Yuzo Tsuchiashi
Tokuma Nishiokaas Takehito Fujio
Yoshio Tsuchiyaas Businessman Yasuaki Shindo
Kenji Saharaas Minister Takayuki Segawa
Koichi Uedaas Former Lagos Island Soldier Ikehata
So Yamamuraas Prime Minister