Episode 100
On Christmas night, Dr. Ochanomizu opens the will of his scientist friend who died 10 years before. It says that he has left an invention in Bururu Mountain. Atom and his friends happen to be on the mountain, and encounter a boy called Akio who lives alone there. They become friends, but... Source: tezukaosamu.net
Aired 26/12/1964EP 100 - Episode 100

Astro Boy
In the distant year 2003, Japan is a technological utopia, and robots are everywhere. One such robot, Tobio, was built by the brilliant Dr. Tenma to replace his dead son. But when it soon becomes apparent that Tobio is an imperfect copy of his departed child, Dr. Tenma throws him out. He is rescued from the scrap heap by the benevolent Professor Ochanomizu, a crusader for robot civil rights. Now the little robot, renamed Astro Boy, is given a mission to defend Japan and the world from all manner of sinister threats. Using his seven super-abilities and 100,000 horsepower worth of strength to battle evil, Astro hopes to set an example to the world of the good which all robots are capable of.