Subtitle: (Space Ape-man?, Uchū enjin) 宇宙猿人
Banished from the peaceful simian Planet E, the mad scientist Dr. Gori and his brutish assistant Karas search for a new planet to rule after Gori's plot to conquer Planet E had been foiled by its government. Coming across the Earth, Gori is captivated by its beauty, but is appalled by its inhabitants' misuse of its environment, leading to severe pollution (since Tokyo was the most polluted city in the world at the time), so mankind must be quickly conquered if this planet is to be inhabitable, so he plots to, ironically, use the very same pollution that's plaguing the Earth to create horrible giant rampaging monsters to wipe out and/or enslave mankind.
Fearing that Gori may eventually make the Earth uninhabitable, the Nebula 71 Star inhabitants dispatch Spectreman, their super-cyborg agent, to battle the menace of the mad apeman. Eventually Dr. Gori is defeated and driven to face Spectreman. While the hero tries to convince him that his remarkable intelligence should be put at the service of good rather than be used for destruction and tyranny, Gori eventually commits suicide, after replying that he'd rather die than be denied his supremacy over Earthlings.
- Kiyoshi Kobayashi (1-10, 19-29)
- Seizo Kato (11-18)
- Ren Nishiyama (30-63)
- Suit: Takanobu Toya
- His name, Gori, is a short for gorilla, signifying his origin from a non-human primate-like alien race.