Story Structure — 4 Plot Phases
The Saucer Beneath The Sea
A flying saucer announces an intended conquest of Earth and defeats the jets sent against it. After disappearing beneath the Pacific, it is followed by unexplained ship disappearances.
Key Events
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Alien Saucer Arrives — A flying saucer arrives and announces an emperor's plan to conquer Earth.
Location: Earth's atmosphere
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Jets Are Attacked — The saucer attacks the jets sent to intercept it.
Location: Sky above Earth
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Saucer Enters Pacific — The flying saucer vanishes beneath the Pacific Ocean.
Location: Pacific Ocean
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Ships Begin Disappearing — Months later, ships begin disappearing in the same ocean region.
Location: Dangerous Pacific waters
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Johnny Meets Jerry — Johnny meets Jerry aboard a vessel traveling through dangerous waters. Characters: Johnny Sokko, Jerry Mano
Location: A vessel at sea
Captivity And Robot Awakening
Johnny meets Jerry during the dangerous voyage, but a sea monster attack leaves them shipwrecked and captured. Their escape secures the control device, while an atomic blast activates Giant Robo under Johnny's command.
Key Events
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Sea Monster Attack — A sea monster attacks, leaving Johnny and Jerry shipwrecked. Characters: Johnny Sokko, Jerry Mano
Location: Pacific Ocean
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Captured By Invaders — The invaders capture Johnny and Jerry after the shipwreck. Characters: Johnny Sokko, Jerry Mano
Location: Enemy base
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Escape From Captivity — Johnny and Jerry escape captivity with help from a captive scientist. Characters: Johnny Sokko, Jerry Mano
Location: Enemy base
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Robot Control Device — The pair receives the control device for the giant robot before fleeing. Characters: Johnny Sokko, Jerry Mano
Location: Enemy base
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Atomic Bomb Detonates — An atomic bomb destroys the enemy base during the escape. Characters: Johnny Sokko, Jerry Mano
Location: Enemy base
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Robot Awakens — Radiation from the atomic bomb activates Giant Robo. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Destroyed enemy base
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Johnny Gains Control — Giant Robo begins obeying Johnny alone. Characters: Johnny Sokko, Giant Robo
Location: Open battlefield
The Invaders Escalate
Unicorn tests Giant Robo while the enemy searches for ways to capture it. Monsters, a strange plant, attacks on scientific knowledge, and the disappearance of a Kyoto-bound train widen the threat.
Key Events
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Extreme Heat Test — Unicorn tests whether Giant Robo can withstand extreme heat. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Unicorn testing facility
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Enemy Targets The Robot — The enemy repeatedly devises schemes to seize Giant Robo. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Unicorn operational area
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Monsters Are Unleashed — The emperor's agents unleash monsters and other threats against Earth. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Earth
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Strange Plant Activated — A strange plant is activated after a lake is drained. Characters: Johnny Sokko, Jerry Mano
Location: A drained lake
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Scientists Are Targeted — The invaders target scientific knowledge that may explain the strange plant. Characters: Johnny Sokko, Jerry Mano
Location: Unicorn investigation area
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Kyoto Train Disappears — An enemy plot makes a train and its passengers disappear before a secret conference. Characters: Jerry Mano
Location: Railway to Kyoto
Wounded Resistance
Unicorn discovers that its confidential plans have been compromised. Johnny is shot, a wounded operative survives through hidden armor, and the struggle against the emperor remains unresolved.
Key Events
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Plans Are Compromised — Unicorn realizes that its confidential plans have been compromised. Characters: Johnny Sokko, Jerry Mano
Location: Unicorn headquarters
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Johnny Is Shot — Johnny is shot during an operation, raising fears that Giant Robo may stop responding. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Enemy operation zone
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Protective Armor Revealed — A wounded Unicorn operative survives because protective armor was worn beneath clothing. Characters: Jerry Mano
Location: Enemy operation zone
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Fight Remains Unresolved — The struggle continues as the emperor pursues Giant Robo and plans to conquer Earth. Characters: Johnny Sokko, Jerry Mano, Giant Robo
Location: Enemy headquarters area