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Episode 1
Kikaida battles Gray Rhino King, and when he returns to the lab where Dr. Komyoji and Mitsuko work, Professor Gill sets it ablaze.

Episode 2
Kikaida faces Green Mantis, who is planning a killing rampage to discredit Dr. Komyoji.

Episode 3
Although hindered by the sound of a Gill's flute, Jiro changes into Kikaida in order to battle Orange Ant.

Episode 4
Yukiko attempts to sneak away from the Destructoids to visit her daughter, but she is thwarted by Blue Buffalo.

Episode 5
Prof. Gill uses Yellow Jaguar to assassinate the head of the Green Project, in order to get enough carbon dioxide for his bomb.

Episode 6
The Destructoids begin to gather up humans to be used by Black Horse, and Mitsuko and Masaru fall into their hands.

Episode 7
Bull Kong kills a man who has been campaigning against the Destructoids, and Dr. Komyoji is framed.

Episode 8
In order to develop his evil apparatus, XR4, Prof. Gill orders Carmine Spider to find a child with Rh negative blood.

Episode 9
Red Condor kills everyone in a rural village in order to set up a base on which to conduct experiments on a biological weapon.

Episode 10
Scorpion Brown has stolen a newly developed weapon from the Nakabori Laboratory and DARK plans to mass produce it.

Episode 11
Mitsuko and Masaru are captured by Gold Wolf and Jiro is seriously injured by him when he tries to save them.

Episode 12
Prof. Gill sends Silver Cat in search of some ancient treasures that hold the secret to increasing the capabilities of the androids.

Episode 13
Prof. Gill orders Pink Tiger to find the secret robot part that Dr. Komyoji has hidden away.

Episode 14
Prof. Gill recreates the 13 Destructoids defeated by Kikaida, and gives them three times their original power in order to test them against Silver Tortoise.

Episode 15
Golden Bat approaches Mitsuko and Masaru in the form of Taro, their older brother, who was supposedly killed by DARK.

Episode 16
Destructoid Rouge Jellyfish is conducting experiments with poisonous mini-jellyfish in a polluted river.

Episode 17
Under orders from DARK, Red Hornet begins spraying toxic gasses aimed at destroying the environment.

Episode 18
Black Chameleon manages to hijack a load of atomic uratonium. Pursued by Jiro, he takes Mitsuko and Masaru hostage.

Episode 19
King Crab Maroon steals a 50-carat emerald ring which he needs to complete his new weapon.

Episode 20
Blue Water Scorpion adds a toxic substance to the drinking water, in order to turn the people into puppets of DARK.

Episode 21
Purple Rat steals into a laboratory dedicated to communicable diseases in order to create a new DARK plague.

Episode 22
Caution: This episode may be offensive, or distressing to some viewers, due to scenes reminiscent of the events of September 11, 2001.
White Sawshark takes over the apartment of a mother and son and sets up a laser gun. Prof. Gill's plan is to shoot down a plane filled with a special fuel into a densely populated area.

Episode 23
The Yellow Antlion Brothers create the "Alphabet" attack strategy in order to stop the wedding of a robotics scientist.

Episode 24
Pink Armadillo transforms itself into a voluptuous woman to entice men, and implant control devices in their brains.

Episode 25
Convinced by Prof. Gill that Kikaida has killed his children, Dr. Komyoji creates Orange Snail to avenge their deaths.

Episode 26
Kikaida saves Dr. Komyoji from Green Mammoth, but Mariko is kidnapped, and Kikaida gets sprayed with an oxidizing agent.

Episode 27
Dr. Araki, who has perfected the conscience circuit, is attacked by Violet Turbo. Jiro tries to save him, but is thwarted by Prof. Gill.

Episode 28
Kikaida saves Masaru from Red Scorpionfish, but gets infected by a corrosive bacteria.

Episode 29
Masaru is saved by a girl in red, as he is being pursued by Green Sponge. Kaori believes Masaru is a runaway, and declares she'll run away too.

Episode 30
Crimson Squid pursues brilliant young robotics expert, Shimamura Chidori. He intends to implant her brain into an android.

Episode 31
Prof. Gill orders Golden Octopus to hasten the construction of their secret base. Kikaida tries to save a father and daughter from DARK henchmen.

Episode 32
Kikaida, who has lost an arm, battles with Blue Electric Eel, and finally manages to tear an arm off the destructoid.

Episode 33
Mask Crab Red tries to kill Mitsuko, but he is thwarted by King Crab Maroon, who had been saved by her earlier.

Episode 34
Prof. Gill sends Black Spiny Anteater and his daughter, Tiny Spiny, to retrieve some sensitive microfilm from a widow of a victim of DARK.

Episode 35
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.

Episode 36
Blue Stag Beetle robs bank after bank in an effort to raise funds for the development of DARK's greatest destructoid.

Episode 37
Jiro manages to save a little girl from Purple Starfish. Meanwhile, DARK forces Dr. Komyoji to create the evil warrior, Hakaida.

Episode 38
Jiro escapes from prison, but is attacked by Hakaida. Jiro is overpowered, but Hakaida is unable to destroy him.

Episode 39
Angler Brown has plans to brainwash children and turn them into warriors. Kikaida saves the kids, but slips a way quickly to avoid the police.

Episode 40
Grasshopper Gray builds an antenna that amplifies sounds 3000 times. Masaru saves a young boy who is being attacked by Grasshopper Gray.

Episode 41
Mitsuko and Masaru are lured to the DARK base. Jiro stops them and proceeds alone, but he's bushwacked by Red Mine Toad. He changes into Kikaida, but gets blown to pieces.

Episode 42
Hanpei brings Kikaida to Mitsuko in pieces. Hakaida destroys Red Mine Toad who had downed his arch rival Kikaida. Then, Hakaida is defeated by Skeleton Flying Squirrel.

Episode 43 - Final Episode.
Mitsuko succeeds in surgically returning the brain in Hakaida's head to her father, but Dr. Komyoji doesn't regain conciousness until...