Disguised as a human being, Spectreman requests his transformation from the unseen stern but benevolent Overlord of the Nebula Star, or is ordered by same to do so. Saying "Ryōkai", or "Ready" in the US version, he raises his right hand towards the Nebula Star, which shoots a beam at him, transforming into Spectreman, a super-powered cyborg in a gold-and-copper cuirass, with a fin-topped full helmet with an angular metal face somewhat resembling the Rocketeer's signature headgear. Before transforming back into a human, however, he simply faints. Spectreman starts out as human-sized and can increase his size at will. In addition to superhuman strength and agility and the ability to fly, Spectreman's weapons included:
Spectre-Flash: Spectreman's ultimate weapon, a rainbow-like energy beam he shoots from his hands or wrists.
Shuriken: Multicolored shuriken, which he pulls from his belt buckle.
Spectre-Blades: Razor-sharp blades that spring forth from Spectreman's forearms.
Spectre-Sword & Shield: Sword and shield sent to Spectreman from Nebula Star when requesting them.
Spectre-Gun: A huge gun sent to Spectreman from Nebula Star when requesting them.
While Spectreman is virtually invincible, he can still be damaged. In one episode, when injured in the leg by an opposing monster, he bled green blood. He bled one other time, when bitten in the neck by a space vampire. Notably, his blood color had changed to bright yellow.
Plot
Banished from the peaceful and highly advanced simian Planet E, the mutantmad scientist Dr. Gori and his brutish gorilla-like assistant Karras search for a new world to rule after Gori's plot to conquer Planet E had been foiled by its government. Traveling to Earth in their flying saucer, the blond alien apeman is captivated by its beauty but appalled by its inhabitants' misuse of its environment, leading to severe pollution, so humankind must be quickly conquered if this planet is to remain inhabitable. Gori therefore plots, rather ironically, to use the pollution that is plaguing Earth to create horrible, giant, rampaging monsters to wipe out and/or enslave humankind. Hope comes in the form of the Nebula 71 Star, an artificial satellite resembling twin planet Saturns joined together that observes Earth incognito. Fearing that Gori may eventually make Earth uninhabitable, they dispatch Spectreman, their super-cyborg agent, to battle the menace of the mad apeman. Spectreman disguises himself as a Japanese man named Jôji Gamô to walk among the humans and scout out Gori's weekly menace for the Nebula 71 Star. He works with a government-run group called the Pollution G-Men, run by Chief Kurata. This group investigates phenomena involving pollution, but they do not have the facilities to handle giant monsters, so unbeknownst to them, their comical-yet-mysterious teammate Jòji disappears on them, only to help them as Spectreman! As the series comes to a conclusion, Dr. Gori's subordinates - and even Ra - are largely defeated, forcing the mad scientist to face Spectreman by himself in the last episode. 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 commits suicide after replying that he would rather die than live with such an inferior and self-destructive race as the humans.
The entire 63-episode Spectreman series was dubbed into English and syndicated to television stations across North America, including Superstation TBS, starting in the fall of 1978. The English dubbing was co-written and performed by character actor Mel Welles, who is best known for his performance in the original film version of The Little Shop of Horrors. While the US version is faithful to the original show for the most part, the most notable change is the new theme song created by a song writing team using the song "The First Day of Forever" from the albumAwakening by the Mystic Moods Orchestra. The instrumental version was used as a substitute for the Japanese language theme song, and was played over action scenes. The instrumental version of the Japanese theme song was usually left alone. Other changes were edits to remove some of the violence considered too intense for a US children's show at the time. The dialog was sometimes altered to add some of Mr. Welles' offbeat humor. While once available on VHS, the US version has not been released on DVD.
Spectreman was parodied in the Franco-Belgian series Télechat as Leguman. Rather than being made of machinery, Leguman was made of vegetables with carrots for arms, pea pods for legs, a jack o'lanternpumpkin for a head, and a radish chest emblem on his leotard, and he engaged in brief inane low budgetlive action battles with bizarre robot monsters based on everyday items in mundane urban settings, all while a male voice chanted his repetitive Spectreman-inspired theme song.