S1 • E1
The metallic cop Jiban goes into action to stop a Bionoid when it seizes a virus that can shut down the computer systems of Japan.
S1 • E2
Doctor Giba infiltrates the police using a Bionoid in order to root out and eliminate Jiban.
S1 • E3
When produce begins to come to life and attack humans, Naoto tracks it to a suspicious man preparing to expand the operation for Bioron.
S1 • E4
The daughter of a biological scientist takes revenge on those that scorned him, drawing her to the attention of Bioron.
S1 • E5
Jiban teams up with an intelligent violence-hating robot whose scientist is abducted by Bioron searching for a powerful microchip it contains within.
S1 • E6
Naoto protects a zookeeper who has discovered the last living dinosaur egg from Bioron, who wishes to hatch it.
S1 • E7
Doctor Giba transforms a young girl's lost doll into a Bionoid infected with a deadly virus that kills 24 hours after infection.
S1 • E8
Naoto investigates a lead of a man who worries about the sudden change in his company president and a land grab associated with a Bioron plot.
S1 • E9
Naoto investigates the discovery of a puppy that acts like a cat associated with Bioron's experiments with a mad dog virus changing animal genetics.
S1 • E10
Naoto tries to help a girl save her father after a Bionoid takes his place to change a device that makes dreams into nightmares.
S1 • E11
On Mayumi's birthday, she and Naoto recall the origin of Jiban in hopes of finding out the truth of her family.
S1 • E12
Yoko is captured by Marsha and Karsha as they try to discover Jiban's secret identity through her.
S1 • E13
While investigating a Bioron plot to turn children into food, Naoto encounters a sad boy who claims he hates him.
S1 • E14
While trying to help a boy deal with his drunkard father, Naoto becomes attacked by a Bionoid who shuts down Jiban's computer system, making him helpless.
S1 • E15
A caring pianist becomes transformed by a Bionoid into a werewolf to compose a song that will control humanity.
S1 • E16
A caring pianist becomes transformed by a Bionoid into a werewolf to compose a song that will control humanity.
S1 • E17
Discovering her connection to Jiban, Doctor Giba abducts Mayumi's mother in order to lure her and Naoto into a trap.
S1 • E18
Bioron's newest creation crushes Jiban and abducts Mayumi, forcing Naoto to find her before they discover his secrets.
S1 • E19
When a girl accidentally discovers a creature connected with Bioron's secrets, Naoto must judge which is more valuable when she is abducted for her discovery.
S1 • E20
Naoto becomes suspicious of a drifter seen associated with a Bionoid throwing out free money and who unknowingly has taken in the amnesiac Mayumi.
S1 • E21
A search for a stolen cricket leads Naoto to face a Bioron plot to create poisonous monster insects.
S1 • E22
Naoto follows a lead regarding Mayumi's whereabouts from a boy who claims to have seen her when he may have other intentions.
S1 • E23
A Bionoid abducts a manga artist believing he can create a comic with himself as the hero who defeats the "villainous" Jiban.
S1 • E24
An incident makes Muramatsu believe he is Jiban, making him a target for Bioron's abduction.
S1 • E25
A Bionoid takes Ryo's guise in a plot to destroy art throughout Japan, including the visiting Mona Lisa.
S1 • E26
Jiban heads to Hamanako to save Yoko and several girls from a dangerous Bionoid who will gain a dangerous power by absorbing their energy.
S1 • E27
Naoto and Yoko investigate several scientist children who begin to act strangely and defy their parents, even with no potential Bioron connection.
S1 • E28
A man who looks just like Doctor Giba causes confusion when Marsha and Karsha accidentally give him a stolen alien sample intended for their boss.
S1 • E29
Several strange incidents force Naoto and the police to investigate a marriage interview group set up by Bioron to brainwash young bachelors.
S1 • E30
An accident transforms the father of a young kabuki actor into a mutant monster that Naoto must figure how to save.
S1 • E31
Jiban teams up with Manabu Yamaji to save the father of a girl after his mind is abducted by a ninja Bionoid.
S1 • E32
A mysterious Bionoid who heals instead of hurts finds itself under Jiban's protection when Bioron targets it for elimination.
S1 • E33
Jiban finds himself protecting Mad Garbo when a flower which changes her evil personality to a kinder one blossoms on her face.
S1 • E34
The discovery of an alien lifeform leads to a showdown where Jiban must protect it from the evil intentions of both Bioron and Queen Cosmos.
S1 • E35
With Jiban dead and Bioron running rampant throughout Japan, Yanagida prepares the means to revive him, but still requires the assistance of the missing Mayumi to complete it.
S1 • E36
Naoto pursues a Bionoid brainwashing children while believing himself to be a great, noble samurai.
S1 • E37
Queen Cosmos abducts clothing as she tries to understand the concepts of human beauty, even as Naoto and Bioron try to continue to decipher who she is.
S1 • E38
When his younger brother mysteriously abandons his police post to go back to their hometown, Kiyoshirou follows in pursuit unknowing of the Bioron trap set up there.
S1 • E39
Bioron targets a vulnerable Mayumi when they see the bomb planted on her as the only way of eliminating Jiban.
S1 • E40
Queen Cosmos causes chaos by messing with all the clocks in Tokyo, particularly with Muramatsu as he tries to meet with his visiting little sister.
S1 • E41
A troublesome policewoman friend of Yoko's ends up protecting a deadly virus from a pursued scientist from Bioron.
S1 • E42
A rock band looking for their big break assists Jiban in taking down a Bionoid collecting all of the energy in the city for Doctor Giba.
S1 • E43
A Bionoid infects Yoko with a space virus so she can infect Jiban and destroy his mechanical systems.
S1 • E44
After Queen Cosmos releases a sleeping sickness, an attempt by Bioron to gain the cure leads to a scientist's brain to be switched with a fanboy's.
S1 • E45
A kendo teacher tries to regain his respect from a student by fighting against an unstoppable squid Bionoid even Jiban can't stop.
S1 • E46
A discovery by Ryou and Mayumi leads Jiban to his final battle with Queen Cosmos as her true purpose and identity is finally revealed.
S1 • E47
Bioron is inspired by a boy to create a unicorn Bionoid which traps him within to prevent Jiban from destroying it.
S1 • E48
Two photographers get in trouble when they accidentally discover Bioron's secret lab and have a hard time proving it.
S1 • E49
Doctor Giba tries to use emotions to force Mayumi to remember the location of the Jiban base for its destruction.
S1 • E50
Naoto discovers the truth connecting him and Mayumi as Bioron discover his identity as Jiban and use it to their advantage.
S1 • E51
As Bioron prepares for their takeover of the world, Naoto prepares for his final showdown unknowing of a massive sacrifice needed to finally track his greatest enemies down.
S1 • E52
Jiban confronts Doctor Giba in a final showdown with the forces of Bioron and to determine the final fate of his sister, Mayumi.
Dr. Giba
Dr. Giba
Naoto Tamura
Mayumi Igarashi
Marsha
Karsha
Narrator
Yanaguida
Kyoshirou Muramatsu
Youko Katagiri