The Humanoid

Graal escapes from a prison satellite, seizes a warship, and recruits Dr. Kraspin to his cause. He plans to conquer Metropolis and eliminate anyone who opposes him. This escape sets the stage for the raid on the Grovan Institute to seize Kapitron.

Kraspin reveals a plan to create an army of mutations called Humanoids using Kapitron. The Kapitron is kept at the Grovan Institute on Metropolis. The partnership with Graal gives the plan a clear path to action.

Graal's squad breaches Grovan Institute and steals the Kapitron. The raid also targets Barbara Gibson, a scientist who opposed Kraspin, with orders to kill her. The theft accelerates Kraspin's ambitions and triggers Barbara's evacuation.

Barbara Gibson is warned by her mysterious pupil Tom Tom and leaves before the slaughter. Tom Tom also communicates with two enigmatic travelers who may be guiding him. Her departure buys her time but sets in motion new dangers.

Graal returns to his hidden base on Noxon and is joined by the tyrant queen, Lady Agatha, who aims to rule the galaxy with him. Kraspin also hides there, keeping Agatha young with a life-sapping youth serum. The power alliance grows as the plan shifts off-world.

Kraspin selects Golob, a bearded giant, as the perfect specimen for mutation. He uses a Kapitron-powered device to crash Golob's ship into a lake and detonates a Kapitron missile inside him. Golob mutates into a raging behemoth under Kraspin's control.

Golob is fitted with a brain-control chip and unleashed on Metropolis to kill The Great Brother. Nick, a Metropolis security officer, fights to protect the ruler from the rampaging giant. Kraspin shifts his orders to first pursue Barbara.

Tom Tom uses his powers to calm Golob and removes the brain-control chip, freeing him. Golob regains his humanity and becomes Barbara's ally. He reveals that Graal and Kraspin are hiding on Noxon and urges Barbara to inform Nick and The Great Brother.

Barbara is captured by Graal's forces and taken back to his base. Tom Tom and Golob attempt a rescue but are repelled by Graal's soldiers. They are saved at last by two mysterious travelers who shoot the guards with glowing arrows.

Nick devises a plan to rescue Barbara from Noxon, but The Great Brother fears civilian casualties. Golob volunteers to undertake the mission, and Nick joins him as they depart toward Noxon aboard a ship, with Tom Tom stowing away to help.

Their ship is attacked by Graal's fighters and crash-lands near Noxon. They meet Kip, Golob's robot dog ally, who helps them slip into Graal's base. Inside, they discover Kraspin's giant Kapitron missile that could devastate Metropolis.

Barbara is brought to Kraspin's laboratory on Noxon and placed in a machine to extract her life essence. Nick and Golob burst in, freeing her at the last moment. Kraspin and Agatha flee toward Graal's ship with their plans intact.

The heroes, aided by the travelers, assault Kraspin's launch bay where the Kapitron missile is prepared. Kraspin is killed when Golob topples the launch pad, and Agatha dies of old age after failing to obtain the youth serum. Nick duels Graal on his ship's bridge as the battle rages.

Golob removes the Kapitron container from the missile, causing the weapon to detonate away from Metropolis and destroying Graal's ship. The facility explodes as the heroes flee, but Golob is last seen escaping, carrying the Kapitron toward a lake. The mutation's effects reverse as he returns to his normal self.

A mysterious translucent sailing ship appears in the sky, piloted by the two travelers. Tom Tom tells Barbara he is returning to Tibet in the ancient past, but that he will always be with her in her heart. He departs, leaving Barbara to face the future with renewed hope.