The episode sees the titular robot hero Astro Boy facing off against Frankenstein, a robot controlled by evildoers.
The 1963 Astro Boy anime adapted Tezuka’s manga of the same name, and it became Japan’s first half-hour animated series.
Eiji Ōtsuka, a 59-year-old professor at the International Center for Japanese Studies, reported that he discovered an unused 36-page scenario for an unaired first episode of Osamu Tezuka’s landmark television anime Astro Boy (Mighty Atom).
The show’s first episode ended up being “The Birth of Astro Boy” episode.