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At the request of the foundation, teenage rocker Shane G. joins the Thornberrys during their stay in Alaska. Since Eliza and Debbie both have a crush on Shane, they both go exploring with Shane only to discover who thick-headed he really is.

Geographical Location: Alaska

Eliza and Shane plan to go see a old gold mine full of fool's gold, but Eliza gets jealous when Shane invites Debbie along to help with her art project.

Geographical Location: Bethel, Alaska

The Thornberrys pay a visit to Nigel's parents in Scotland at Thornberry Hall right before Nigel is to be made a knight by the Queen of England. Once there, Nigel's mother, Cordelia, presses him to accept a tenured professorship at Oxford. The prospect of the family settling down upsets Eliza but thrills Debbie. Meanwhile, Eliza rushes to save some golden eagles from eating poisoned meat from a trapper.

Eliza rescues her golden eagle friend from the trapper and Thornberry clan rushes to London for Nigel's knighting ceremony. After being knighted, the newly Sir Nigel most choose between becoming a teacher or continuing his adventures with his family.

Filming penguins in Antarctica, Eliza begins practicing for her future profession as a vet, when she comes across a wounded penguin. She rescues her, but may have made matters worse by separating the penguin from her mate and her egg. When she borrows a snow speeder to get back to the penguin breeding grounds, will she make it in time to put things right?

Shane is ready to leave the Thornberrys to go back to his life as a popstar and Eliza has to be fast to tell Shane her true feelings for him before its too late. But when Shane and Eliza have a little fight and Shane runs away,can Eliza find him in time to make up and tell her feelings?