第21話: ロビンソンズがカメの産卵を観察し、蛇から巣を守って孵化まで見守る
1981年5月24日 放送

21
The Robinsons watch a turtle laying eggs on the beach, and are impressed with the solemn ceremony. Becca and Jack keep watch over the nest, fighting off a hungry snake, until the eggs hatch and the baby turtles disappear into the sea. (Source: Wikipedia)