With the blood-sucking leeches he controls the monster Leechguerilla absorbs the lifeblood of humans, and by injecting a green medicine into them he can change the humans he takes blood from into slaves.

Hongo's friend Sawada completes a liquid gunpowder that can melt any metal. The Shocker monster Poisonmondo targets this gunpowder.

Doctor Ootaguro succeeds in developing the “Alpha Liquid,” a life revitalizing drug that can revive a dead organism.

After defeating Canarycobra, Nezucondor appears before Kamen Rider. Nezucondor carries the plague inside his body and impliments the pet strategy to spread it throughout Tokyo.

Mamoru clings to life in a hospital, while his sister blames Kazami Shiro and betrays him to Destron. Hammer-Jellyfish continues the interrogation of Nishizaki and resorts to forcing the information out of her by dangling Tsutomu off of a high-rise. Will Nishizaki give in to Hammer-Jellyfish for her son's life? Can V3 defeat the powerful mutant and save them?

Kazami Shiro's rival, Yoshioka Masaru, and other top racers in the All Japan Motorcross Championship, are captured by Destron's Lens-Ant. He transforms them into the Destron Hell Squad in order to rob a convoy carrying a nuclear-powered satellite. The mutant also captures Junko and Shigeru! Will Shiro save his friends? Can V3 defeat not one, but two mutants, single-handedly?

Destron's Razor-Starfish teams up with Lens-Ant to attack V3, and they send the Hell Squad to steal a shipment of nuclear satellite fuel. Meanwhile, Tachibana Tobei and the Rider Scouts are captured while searching for Junko and Shigeru. Can Kazami Shiro find the antidote for the Hell Squad, rescue his friends from certain death, and take on both mutant cyborgs?

Destron forces Marine biologist Dr. Nakatani to create a powerful aquatic mutant, Pickaxe-Shark. The doctor escapes, but his creation is sent to kill him. Meanwhile, a chinpira exposes Kazami Shiro's secret identity to Junko, but is captured and transformed into Drill-Mole. As V3 battles Pickaxe-Shark in the open sea, Drill-Mole abducts Junko to force her into an unholy union!

Destron's Pickaxe-Shark proves a formidable foe to V3, who suffers defeat at the claws of the mutant. Meanwhile, Junko is prepared for an unholy union with Drill-Mole... Can Kazami Shiro recover in time to defeat Pickaxe-Shark and rescue Junko from a fate worse than death � while guarding his secret identity?

A couple hikes into the mountains to research the secret of the legendary Boar-Man, but only the woman returns. Suspecting Destron, Kazami Shiro goes to the hospital, only to have the missing man reappear � a disguise for Magnet-Boar, who aims to destroy Japan's national railway system. After an intense fight, Shiro discovers that he cannot transform into V3! But, this was simply a ruse to allow the sinister Doktor G safe passage into Japan...

Toad-Boiler attacks Interpol agent George Kamamoto, who is trying to pass on a coded document from Riders One and Two to Kazami Shiro. V3 saves Kamamoto, and then heads for Chichibu, as directed by the document. Toad-Boiler implores him to transform into V3, and then sprays him with a white fluid � a substance that drains V3's energy! Can V3 survive and obtain the secret left behind by the Double Riders?

The daughter of Dr. Okajima, an atomic physicist who escaped the clutches of Destron with the help of the Double Riders, saves the badly injured Kazami Shiro from the basin of a waterfall. She is then stalked by Burner-Bat, who is looking for V3. With the help of Dr. Okajima, Shiro is able to find the memento from the Double Riders, which holds the secret to V3's four weaknesses. What are they?

Rider Scout Saburo and his father save a hapless fisherman, whom witnessed mutant Missile-Gecko in action. V3 fights off Missile-Gecko, but meanwhile, Destron snatches Saburo and his father. When Saburo discovers Destron's plot to destroy the petroleum complex, will he be able to contact Rider Scout HQ? Can V3 save Japan from plunging into total chaos?

The fearsome Spray-Rat takes on the likeness of a priest and finds a young couple to use as guinea pigs for his Devilspray virus. He offers to marry them, but only allows one witness � Tama Junko. Kazami Shiro arrives in the nick of time, but cannot prevent the groom from being infected. While rescuing the bride, V3 is trapped in a church with a ticking time bomb! Can V3 escape deadly doom?

Kusarigama-Beetle captures Kazami Shiro and takes him to Destron's outpost. While Doktor G is torturing Shiro he breaks free and seizes the files for the Devilspray antidote � only to discover that it is a fake! V3 is ambushed by the Destron mutants, and in the heat of battle Spray-Rat attacks Kusarigama-Beetle. The injured mutant decides to betray Destron and help Shiro retrieve the antidote for the Devilspray. But, is V3 being lead into a trap?

Kazami Shiro rushes to Tatsunoko Point where Destron has been sinking passing ships, in a bid to seize control of the seas. After encountering Blowfish-Apache's torpedoes, Shiro discovers slaves working in a secret weapons factory. With the help of Tachibana Tobei, Shiro is able to penetrate the Destron outpost, but they are led into a deadly trap, and sunk to the bottom of the sea! Can V3 save Tachibana and stop Destron?

Destron uses the SS Device flown in from their South American base, in an attempt to conquer the island of Shikoku. Fukazawa, a scientist forced to work for Destron, manages to escape with the schematic. When Kazami Shiro receives word, he heads immediately for Shikoku via ship, but is attacked by Guillotine-Saurus. Can V3 break through and save Shikoku from Destron's grip?

V3 is saved by the voices of the Double Riders coming from a special medallion. In Shikoku, Kazami Shiro disguises himself as a Destron sympathizer to repair the SS Device. Meanwhile, Fukazawa, Tachibana Tobei and Tama Junko fall under the control of Syringe-Spider! Can V3 stop Doktor G's conquest plans and find the antidote to save his friends from the clutches of Destron?

The Rider Scouts are at training camp on Hatsushima Island, where mutant Speargun-Sea Lion has established an undersea outpost to manufacture poison gas. Destron plans to transport the chemical weapon via an underground canal to Mt. Fuji, where the winds will spread the gas over hundreds of miles. Kazami Shiro orders the scouts to evacuate, but they refuse when they realize one of them is missing. Can V3 stop Destron in time?

Propeller-Beetle begins kidnapping young people � the males are reconstructed into Destron Soldiers, while the blood of the females satisfies his energy source. When the monster hears the voice of the sister of Kazami Shiro's friend Kuroda Kyosuke, he retreats. When she discovers that her brother is really Propeller-Beetle, Doktor G orders the mutant to drink her blood. Kazami enters the Destron outpost when Junko is captured. Can V3 save them?

In order to wage germ warfare on Japan, Destron takes over the Osato Biological Institute and tortures the head scientist, to pillage his research. Meanwhile Rider Scout Yoshio notices that young women go into the institute but don't come out. So he snoops around to check things out, but is captured by Cockroach-Spike. Junko goes in to rescue him posing as a housekeeper, but is also caught spying. Can V3 thwart Destron's plot?

Rumors circulate of savage ape-men in the Omi Mountains, but this is a cover for training Destron's Ranger Squad units. In order to keep this secret Mantis-Merang kills anyone who approaches the area. V3 saves Rider Scout Kenji and his older brother from certain death, but the Destron Rangers soon surround them. Meanwhile, the 2nd Unit of the Destron Rangers starts tainting Tokyo's water supply with the deadly Mummification Virus�

With the Mummification Virus in Tokyo's water supply, Destron plans to turn 10 million people into mummies, using Heater-Cicada's chirp to drive victims to drink the tainted water. Kazami Shiro discovers that Professor Taguchi is the only person who can create an antidote and saves his daughter while trying to rescue Junko. But is the professor's daughter really who she says she is? Has Shiro fallen into a trap?

Rider Scout Shotaro has discovered Shocker mutants entombed in a lakeside cave. When he arrives, the mutants are gone, but Kazami Shiro is ambushed by Destron's powerful Quoit-Beetle. Destron plots to destroy the whole of Japan by resurrecting former Shocker Commandants Colonel Zol, Doctor Death, Ambassador Hell and General Black, using a newly developed toxic gas called Girard Gamma. Suddenly, V3 is attacked by the revived Shocker mutants, led by Quit-Beetle!

Trapped by the five commandants Kazami Shiro falls into an unbreakable cell. Tachibana Tobei, in a bid to rescue Shiro, poses as a scientist who has developed an antidote to the nerve gas, and is abducted. Meanwhile, Shiro turns the table on Ambassador Hell and takes him hostage in order to escape. But, he must infiltrate the outpost once more in to rescue Tachibana and Junko. Can V3 save Japan, as well as his friends, from certain death?