Expedition to Mars is the second episode of the 1960 series. It was first broadcast in Japan on January 15th 1963
When the first expedition to Mars fails because of a mutiny by the crew, Astro is appointed commander of the second expedition. His own crew grows rebellious because he is a robot, however, when his chief officer cut his safety rope, when a strange spaceship crashed onto their rocket, Astro Boy went to investigate only to realize that his safety rope has been cut.