Season 1

The three traitorous Students Kenji Tsukigata, Rui Senda and Gou Omura come back from Outer Space in the name of the Armed Brain Army Volt to begin their attack on the Earth.

With Academia destroyed, the Liveman gain from their dying mentor Doctor Hoshi instructions and a clue to assist in their battle against Volt.

Jou shows doubt in facing down his old friend Gou as he prepares to use a virus to evolve into the ultimate being.

Megumi suspects Mazenda in a plot involving transforming Jimmers into Dummy Man spies.

Yusuke is approached by Takuji's little brother to help complete a car he was working on, which becomes sabotaged by Dr. Kemp and an engine Brain Beast.

A boy befriends a young dinosaur brought to the present by Obular's time-manipulating Brain Beast.

Takeshi and the Liveman try to work out a final solution regarding Gon while Obular decides to experiment in making the dinosaur into a city-destroying giant.

The Liveman trio must learn to draw on other emotions to fight after Dr. Kemp creates a Brain Beast that sucks away anger for power.

Megumi attempts to protect the love of her newlywed friends from being corrupted by Mazenda's love-potion perfume.

Jou takes a delivery job to save a pizza shop - "Pizza Sweet" , which becomes more dangerous after a Brain Beast turns the town into a maze.

Arashi Busujima, a self-proclaimed idiot gang leader, causes trouble for both Volt and the Liveman by making a Brain Beast his own servant.

Bias transforms the idiotic gang leader Arashi into Doctor Ashura, the ultimate genius who befuddles the Liveman with both brains and brawn!

A malfunctioned Jimmer who falls for Colon assists the team in stopping a plot by Mazenda to poison the city.

Ashura depowers and estranged Yusuke with a Brain Beast that turns him into a walking electromagnet.

Jou protects a robot being targeted by Gash for a special crystal Bias wishes to obtain.

Yusuke returns to Academia to retrieve love letters he left that are being used for jumping, zombie-like apparitions of his fellow students.

Megumi fights to regain a doll with emotions that is transformed by Kemp into a doll-controlling Brain Beast.

Jou falls for a mysterious girl created from the remnants of Mazenda's loving heart into a Brain Beast.

A Brain Beast created with Obular's own mind leads to a shocking revelation to the Liveman about their enemy Gou.

Gou is kicked out of Volt for his failures, forcing him to return home in order to resume experiments for becoming the ultimate Obular.

Yusuke attempts to convince Gou's mother to save her son as Volt bring him back for their own schemes.

Megumi tries to give confidence to a girl whose song may be the only means to stop a mad musical alien.

Colon tries to prove her worth to Yusuke against a swordsman Brain Beast using a new metal developed by Kemp.

Yusuke tries to convince a boy the importance of hard work in school and fun while dealing with Mazenda's mental manipulation of children.

On vacation in Aizu, the Liveman help a boy get over his fears of a castle haunted by revived Brain Beasts.

The Liveman investigate a strange light caused by Mazenda's new Giga energy making the insects of Aizu giant-sized.

The Liveman are unexpectedly assisted by Megumi's father as Volt ups the ante with the activation of the Giga Project.

The Liveman struggle against Bias' completed "Giga Volt", but are saved by a mysterious young man with his own hatred of the enemy.

Tetsuya and Junichi, the siblings of the Liveman's deceased friends, push forwards to do whatever it takes to defeat Giga Volt, even with unexpected assistance.

With the continued threat of Giga Volt and Tetsuya and Junichi still driven by revenge, the Liveman must figure a means to come together as a true team to defeat Volt's greatest weapon.

Junichi is implanted with the child of Guildos and Butchy's Brain Beast, forcing him to make a decision regarding his unusual situation. Great Professor Bias begins a mysterious competition for his generals.

Kemp is forced to confront a noble deed of his past when he creates a Brain Beast to steal blood for upgrading his altered form.

Tetsuya dons a costume to make a "robot friend" for a young boy, only to fall into a scheme with Mazenda's own Brain Beast copy of it.

An accident by Ashura allows for a girl from fifteen years in the future into 1988, where she has a peculiar encounter with Jou.

Yusuke and Kemp return to Academia Island to see how far they've come and settle old scores as promised four years prior.

Junichi tries to reconcile with a member of his school rugby team as the rest of the team becomes minions to Mazenda's Brain Beast.

An attempt to stop Kemp's Fear Beast evolution accidentally makes Kemp return to his 16-year old self whom Megumi tries to change from his dark path.

Yusuke unexpectedly runs away from a rampaging Mazenda, who has furthered her modifications into a living mechanical weapon!

Jou assists an alien in retrieving a seed from its homeworld trapped within a meteor Brain Beast.

A tricky jewel thief interested in Megumi gets his hands on a gem containing a Brain Beast that helps him in his devious tasks.

Jou fights to protect his former rival Gou from Volt when he regains memories that are key to the truth behind Bias.

Bias uses the power of Giga Brain Waves to brainwash Tetsuya into sabotaging the Gran Tortoise and killing his Liveman teammates.

Junichi desperately tries to prove his power against Guildos, who wishes to prove the power of his planet to Bias.

After discovering the horrifying truth about himself and Guildos, Butchy goes on a rampage through Earth which is interpreted sympathetically by Megumi.

Fearing being left behind by Bias' remaining pupils, Ashura enacts a plot to hack all information from the world computer networks into himself.

Although changed back to his former idiot form, Arashi continues to try and prove his true worth in a climactic showdown with Kemp's most powerful Brain Beast.

Mazenda fights the Liveman to complete her goal of achieving a thousand-point brain for Bias, even as Gou tries to warn of the consequences of doing so.

As Kemp finally achieves a thousand-point brain for Bias, Yusuke sneaks into Brain Base to stop the Giga Brain Wave from controlling humanity.

As a Bias with restored youth descends to Earth to continue his cycle of destruction for the sake of knowledge, the Liveman must hold him off and find a way of either changing his ways or stopping the mad genius permanently.