Kikaida battles Gray Rhino King and when he returns to the lab where Dr. Komyoji and Mitsuko work, Professor Gill sets it ablaze.
Kikaida faces Green Mantis, who is planning a killing rampage to discredit Dr. Komyoji.
Although hindered by the sound of Professor Gill's flute, Jiro changes into Kikaida in order to battle Orange Ant.
Yukiko attempts to sneak away from DARK to visit her daughter, but she is thwarted by Blue Buffalo.
Professor Gill uses Yellow Jaguar to assassinate the head of the Green Project, in order to get enough carbon dioxide for his bomb.
DARK begins to round up all humans to be used by Black Horse, and Mitsuko and Masaru fall into their clutches.
Bull Kong kills a man who has been campaigning against the Destructoids, and Dr. Komyoji is framed.
In order to develop his evil formula, XR4, Prof. Gill orders Carmine Spider to find a child with Rh-negative blood.
Red Condor kills everyone in a rural village in order to set up a base on which to conduct experiments on a biological weapon.
Scorpion Brown has stolen a newly developed weapon from the Nakabori Laboratory and DARK plans to mass produce it.
Mitsuko and Masaru are captured by Gold Wolf, and Jiro is seriously injured when he tries to save them.
Prof. Gill sends Silver Cat in search of the Crown of Munga, ad ancient treasure that is the key to increasing the power of future androids.
Prof. Gill orders Pink Tiger to find the design for a special circuit that Dr. Komyoji has hidden in one of his older robots at an amusement park.
Prof. Gill revives the 13 Destructoids defeated by Kikaida and gives them three times their original power to test them against Silver Tortoise.
Golden Bat approaches Mitsuko and Masaru disguised as Taro, their older brother, who was supposedly killed by DARK.
Destructoid Rouge Jellyfish is conducting experiments with poisonous mini-jellyfish in a polluted river.
Under orders from DARK, Red Hornet begins spraying toxic gasses aimed at destroying the environment.
Black Chameleon manages to hijack a load of atomic uratonium. Pursued by Jiro, he takes Mitsuko and Masaru hostage.
King Crab Maroon steals a 50-carat emerald ring which he needs to complete his new weapon.
Blue Water Scorpion adds a toxic substance to the drinking water, in order to turn the people into puppets of DARK.
Purple Rat steals into a laboratory dedicated to communicable diseases in order to create a new DARK plague.
White Saw Shark takes over an apartment complex and sets up a laser gun. Prof. Gill's plan is to shoot down a plane filled with special fuel into a densely populated area.
The Yellow Antlion Brothers create the "Alphabet Attack" strategy in order to stop the wedding of a robotics scientist.
Pink Armadillo transforms itself into a voluptuous woman to entice men and implant control devices in their brains.
Convince by Prof. Gill that Kikaida has killed his children, Dr. Komyoji creates Orange Snail to avenge their deaths.
Kikaida saves Dr. Komyoji from Green Mammoth, but Mariko is kidnapped, and Kikaida gets sprayed with an oxidizing agent.
Dr. Araki, who has perfected the conscience circuit, is attacked by Violet Turbo. Jiro tries to save him, but is thwarted by Prof. Gill.
Kikaida saves Masaru from Red Devil Stinger but gets infected by a corrosive bacteria.
Masaru is saved by a girl named Kaori as he is being pursued by Green Sponge. Kaori believes Masaru is a runaway and declares that she'll run away too.
Crimson Squid pursues a brilliant robotics expert named Shimamura Chidori. He intends to implant her brain in his own body.
Prof. Gill orders Gold Octopus to hasten the construction of a secret base. Kikaida tries to save a father and daughter from DARK henchmen.
Kikaida, who has lost an arm, battles with Blue Electric Eel and finally manages to tear an arm off the Destructoid.
Mask Crab Red tries to kill Mitsuko, but he is thwarted by King Crab Maroon, who had been saved by her earlier.
Prof. Gill sends Black Spiny Anteater and his daughter, Tiny Spiny, to retrieve some sensitive microfilm from the widow of a DARK victim.
Dr. Komyoji is attacked by a flock of robot crows as he works in a field. Jiro tries to help him but is thwarted by Black Crow.
Blue Stag Beetle robs bank after bank in an effort to raise funds for the development of DARK's greatest Destructoid.
Jiro manages to save a little girl from Starfish Purple. Meanwhile, DARK forces Dr. Komyoji to create the evil warrior, Hakaida.
Jiro escapes from prison, but is attacked by Hakaida. Jiro is overpowered, but Hakaida is unable to destroy him.
Angler Brown has plans to brainwash children and turn them into warriors. Kikaida saves the ids, but slips away quickly to avoid the police.
Grasshopper Gray builds an antenna that amplifies sounds 3000 times. Masaru saves a young boy who is attacked by Grasshopper Gray.
Mitsuko and Masaru are lured to DARK base. Jiro stops them, but he is bushwhacked by Red Mine Toad. Then, Kikaida gets blown into pieces!
Hakaida destroys Red Mine Toad. Mitsuko repairs Kikaida, but Jiro cannot transform into Kikaida. Then Hakaida is defeated by Skeleton Flying Squirrel.
Mitsuko restores the brain of Hakaida's head to her father. Dr. Komyoji repairs Jiro. Kikaida corners Prof. Gill, who initiates the DARK base self-destruct sequence.