Ep. 8: Doraemon and Nobita travel ten billion years into the past to hunt dinosaurs

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Doraemon and Nobita enter a drawer that functions as a time machine, transporting them ten billion years into the past. During their excursion, they shrink one dinosaur but Doraemon loses his shrinking gun. They successfully escape from a second dinosaur, though Nobita accidentally leaves his glasses behind in the prehistoric era. These glasses are eventually discovered in the present day, causing amazement among scientists who find them. This event marks the pair's first experience with time travel, highlighting the risks and unexpected consequences of their adventures across different eras.