Season 1 · 193 episodes
The visiting Prince Dorian of the Camellia Kingdom disappears. Astro goes searching for him using the latest 4D detection device, and finds the prince wandering in another world. That world is inhabited by people who have been spirited awa…
Uran is going to be in a movie as Tarzan. When she goes on location to the jungle, however, a mysterious woman takes her away. The woman is planning to make Uran, who is dressed as a boy, the prince of the demon's place.
Humans are drawn toward a flight of stairs that suddenly appear one day, and they start to walk towards a spaceship hidden among the clouds. When there are no humans left on earth, the robots start to talk about taking over the planet.
Astro is shot by a gun that ruins artificial intelligence. He loses all his memory, and is shot away into space.
Hamegg sees a UFO in the woods that seems to have made an emergency landing, and finds an alien child. He notices the child's super strength, and plans to win the child's fame as a wrestler.
Astro is involved in an explosion during the construction of a dam. The impact sends him into a parallel world where Tobio, the son of Dr. Tenma, never died in an accident. In other words, it is a world where Astro has not been born.
Three scientists gain supernatural power on the surface of the moon. Then Dr. Arden, who has a grudge against Dr. Ochanomizu, stages an attack against him. In order to protect Dr. Ochanomizu, Astro fights fiercely against the scientists wh…
Astro finds a big egg in a cave. He asks Dr. Ochanomizu to identify the egg, but they are unsuccessful. So Astro goes back to the island, where he encounters a strange bird that lives there.
Astro is investigating a super thermal bomb that has fallen on earth. Then he heads for Mercury to find its launching site. On his way, however, Astro loses his sight in an accident, and gets involved in a power struggle with aliens on Mer…
A country called Back suddenly withdraws from the World Peace Union, and announces to its people a ban on invention and laughter. Astro and Dr. Ochanomizu visit the country to find out what is behind this dictatorial policy.
A robot, Pluto is built to kill the 7 strongest robots in the world, therefore making him the world's most powerful robot.
Pluto succeeds in disposing of Montblanc, North #2, Brando, Gesicht, Hercules, and Photar with ease, leaving Astro as his sole remaining target. After meeting Astro, he begins to question his actions.
Planet M, shaped like a convex lens, is approaching the Earth. It reflects solar light toward the Earth, turning its surface into hell. Humans, however, cannot cooperate in tackling this global issue because they are all motivated by their…
Astro and Dr. Ochanomizu wander into a space graveyard that lies outside every sphere of gravitation, drifting in space. Then an earthling named Bemski, who hates the Earth, rescues them.
Higeoyaji's pet dog Pero has a diamond that it took back from space. Dr. Fooler puts Pero's memory into the computer of Captain Dog, the robot dog, to make it find diamonds. Astro follows the robot dog, which is heading for Mars.
Astro Boy and a group of passengers from a doomed rocketliner are stranded on an asteroid with strange characteristics and a mysterious monster.