The Anniversary

Mt. Fuji, Japan. While camping near Mt. Fuji, the Thornberrys are surprised by the unannounced arrival of Grandma Sophie and Grandpa Frank (Marianne's parents), who are there for their 50th anniversary. When Grandpa Frank announces he has a bad heart, but hates being treated like an old man, he finds a common friend in Eliza, who hates being treated like a little kid. When they decide to sneak off and climb Mt. Fuji at night and run into a black bear, their families may be proven right... or maybe Eliza and Grandpa Frank can prove they can do everything the adults can do.

Eliza Thornberry, Nigel Thornberry, Darwin, Donnie Thornberry, Debbie Thornberry, Marianne Thornberry, Frank Hunter, Sophie Hunter, Asian Black Bear