Ep 9. The Anniversary

Grandma Sophie and Grandpa Frank surprise the Thornberrys with a visit to celebrate their fiftieth anniversary, but when Eliza and Grandpa want to climb Mt. Fuji, everyone thinks they are respectively too young and too old. The two sneak away in the night but soon find that the climb is harder than expected, and Eliza learns that her grandpa is not as able as he used to be. When Grandpa helps mend a wounded bear, however, his spirit is renewed, and they make the climb.