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December 7, 1963
One Million Mammoth Snails
Several missing persons cases have occurred in the snowy mountains. Dr. Elefun and Astro Boy are sent to investigate. There, they find victims whose corpses have been completely dried up. They find a traumatized witness and evacuate him to a nearby research center, where an eccentric scientist does research on artificially growing food and animals.
The original manga was "Guernica" published in the 1955 New Year's special issue of the Shonen monthly magazine. It was included in the second volume of the A5-sized book published in May 1957.
Screenplay/Direction: Tezuka Osamu, Sakamoto Yūsaku
Key animation: Gisaburo Sugii, Motoaki Ishii, Eiichi Yamamoto, and others
Script and direction: Tezuka Osamu
Key animation: Konno Shuji, Anami Kazuko, Hayashi Shigeyuki and others
In the manga, a group of reckless children from Elementary School get lost in the Mt. Tanzawa ski resort while skiing. Atom and Higeoyaji-sensei find Guernica, who are being kept in a research lab at a dam where they have brought the survivors they found. In the anime, the lost children are young men enjoying leisure time.
*This episode was directed by Yusaku Sakamoto, the chief of the Mushi Production TV team, and was started on at the same time as episode 3. It was originally planned to be episode 5, but was changed to episode 4. The third episode took priority, and Sakamoto also had to work on the opening and ending in the middle of the process, so it took six weeks to complete the art.