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 destructive programming he was given by Skunk.
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.
Dr. Tenma gains control of robots with special freezing powers that he plans to use for his own destructive plans. Astro must convince the Robots that Dr. Tenma is an evil leader.
A weather experiment turns a desert into fertile farmland, and proves that humans and robots can work well together. But a rash of earthquakes and storms will ruin the project unless Astro can help.
On the moon of Deimos, robot miners ignore orders from a human foreman and begin digging on their own. Astro must step in before Intergalactic Security exterminates the disobedient robots.
Astro joins a robot-dog to watch a leisurely game of Rocket Ball. When the robot players become destructive, Astro must save the human spectators and control the dangerous robot athletes.
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!
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.
When air-blimp is threatened with a wormhole device, Astro is blamed and arrested. The Blue Knight helps him escape from jail, and together they must save the blimp and prove Astro's innocence.
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.
While saving the planet from a falling satellite, Astro is damaged and loses his memory. Boon, a scientist with a mysterious past, tries to help Astro recover before another satellite hits Earth.
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.
With his authority challenged by Shadow, Dr. Tenma sets out to prove that Astro is loyal to the robot cause and will join them in leading the robot revolution.
Astro and Zoran convince Pluto to stop his destructive ways, but Pluto's inventor, Shadow, creates a more dangerous version of Pluto called Acheron. Astro will need Pluto's help to stop him.
Pluto vows to become the supreme robot champion of the world. As he defeats his rivals, he gains their special powers and becomes even stronger. Astro is the only one left who can stop Pluto.
One after another, children get hurt in the explosion of a balloon in the shape of Astro. It is reported to the police that Astro is the guilty one and people despise him. While chasing balloons Astro is shot by Balast, a candidate for mayor. The real criminal is Skunk in collusion with Balast, who has an anti-robot policy.
An underground city threatens the environment, so the environment fights back--tree roots attack the city and its people. Astro must restore the delicate balance of nature to save the humans.
Rock, a time patrolman of the 23rd century, goes to the country of Molavia in the 15th century with Astro, Uran, brilliant surgeon Dr. Roget and his assistant Penny. Rock accidentally hurts the prince seriously and Dr. Roget treats him, but the great king of wizardry Gore, who wants to take the throne, interferes. Astro and Rock capture Gore, who is a time criminal.
Atlas, who has been released from ice by Livian, challenges Astro to a duel in a ballpark. But Daddy Walrus intervenes and Atlas withdraws. Astro is hidden in the vault of the Ministry of Science. While Astro's friends are riding a subway train, Atlas causes it to go out of control in order to lure Astro out and challenge him again.
