A micro-robot attacks Zoran's operating system from the inside. Astro must shrink down to microscopic size and go inside of Zoran's system to fight the micro-robot and save his sister.

Astro must stop Erasabot from sucking out the artificial intelligence from all the robots in Metro City.

Astro's human friend Matthew loves robots so much that he pretends he is one. But when he tries to use "robot" powers to save his mom from a space shuttle accident, it's up to Astro to save them both.

Astro must find the poison around Dragon Lake. When he gets there he meets the eccentric explorer Gulliver, and they face-off against the toxic Repo Girls in a fight to save Dragon Lake.

Astro must protect Princess Abby against a plot to take over her ancient land of Mayura.

When Shadow unleashes an army of mind-controlling teddy bears on Metro City, it's up to Astro to stop them before they take over the entire population.

Astro partners with Yuko's Uncle Wally to solve a series of baffling robberies involving a dragon-like robotic monster.

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When Astro is activated the city's power starts to drain, and he must try and stop the robot Magnamite from destroying everything. Armed with Kokoro (the ability of free will) Astro discovers his purpose for being activated.

When a friendly robot-dog invites Astro to watch a game of Rocket Ball, he looks forward to a fun day at the ballpark, Instead, the game turns chaotic when the robot players start destroying the stadium and threatening the human spectators. Astro must find a way to save the humans and get the robot athletes under control!

Dr. Tenma builds a powerful robot named Atlas whose abilities rival Astro's, But Atlas has a rebellious nature and begins to destroy Metro City. Astro must save the city from Atlas, while beginning to learn the secrets of his own past.

In order to take advantage of their special freezing powers, Dr Tenma pretends to be the long-awaiting leader of a group of advanced robots. The Robots don't realize that their freezing functions cause terrible destruction by freezing everything in sight. Can Astro convince the Robots to reject Tenma's evil influence?

A robot circus star named Reno is revealed to be a human boy in disguise. Astro must save the circus, and prevent the authorities from taking the boy from his robot family.

The evil Skunk tricks Denkou, an "Invisible Robot," into committing a string of robberies. Astro soon realizes that Denkou is not bad, she just doesn't know the difference between right and wrong and Astro is the only one that can teach her.

An experiment in advanced weather technology has turned a desert canyon into fertile farmland, and proven once again that humans and robots can work together, But a sudden rash of earthquakes and storms threatens to wreck the project. It's up to Astro to find out who is behind the evil plan.

A mysterious robot terrifies humans as he hunts for scrap robot parts and uses them to rebuild his own malfunctioning system. The police target the robot for destruction, but he may not be the "evil robot" he appears to be, and Astro must uncover the truth before its to late.

Skunk reactivates Jumbo, a giant robot and uses him to stage a daring prison break. Astro must stop Jumbo and turn him back into the gentle giant that he really is.

An android robot hunter is attacking innocent robots and dismantling them for sale on the black market. Astro befriends the hunter and tries to help him overcome the programming he was given by Skunk.

Astro joins an expedition to the center of the earth, when a member of the crew causes a mutiny. Only Astro can protect the crew and save the expedition before an eruption of lava destroys them all.

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When Kato hides a hyper-accelerator virus on the robotic super train Neon Express, it sends the train and its passengers speeding out of control. Astro must rescue the passengers and prevent the train from crashing into the center of Metro City.

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Doctor O'Shay creates a robot-sister, Zoran, for Astro. While Zoran is off exploring she is captured by the giant robot bird Katari, and only her powerful big brother can save her!