Location: Masai Steppe, TanzaniaEliza and Tyler work together to help an aspiring Masai warrior earn the respect of his elders.

Eliza and Debbie embark on a dangerous trek in search of precious gemstones.

Location: Borneo, IndonesiaThe Thornberrys reunite and find Donnie in a remote village and learn from the medicine woman there the terrible fate that befell his parents.

Location: Rotura, New ZealandThe Thornberrys visit a tribe of native New Zealanders called the Mahris who are throwing a celebration called a ""Hooey"". As Debbie flirts with a young Mahri, Eliza and Darwin have a fight. When Darwin leaves and Eliza befriends a possum named Penelope who ends up getting her into a hot air balloon that she doesn't know how to steer, will Darwin come to the rescue?

Geographical Location: Alaska

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?

(Since Nickelodeon aired all the Thornberry episodes out of production order,they aired this as part of the 5th season.Its actually part of the 4th season)