Astro is a robotic boy created by Dr. Tenma to replace his late son. When Tenma destroys his laboratory and shuts down Astro, the Ministry of Science revives him and tries to give him a normal life as a 6th-grade student who occasionally helps keep renegade robots from causing harm.

• Makoto Tsumura
• Miki Maruyama
• Hisashi Katsuta
• Shin'ya Ohwada
• Kazuo Kumakura