Seasons & episodes
S3 · E15New Territory 2001-01-12
Location: Kakadu National Park, Northern Territory, AustraliaThe Thornberrys meet an Australian family named the Gibsons when the Comvee runs out of gas. Eliza makes friends with the youngest member of the family named Bethany, who is in a wheelchair from cerebal palsy. The girls go land sailing and Bethany helps Eliza escape from a crocodile, but then get in an arguement when Bethany thinks Eliza is feeling sorry for her being disabled. Will the two new friends find a way to make up? Meanwhile, Nigel and Marianne play the Gibsons in a very competitive game of Tricky Trivia.
S3 · E16Operation Valentine 2001-02-14
Location: Alice Springs, AustraliaDebbie is finally going to meet her e-mail friend in person and she is determined to make a good impression. Meanwhile, Eliza is having strange pains in her stomach and ends up stranded on top of a small mountain as Donnie gets attacked by a giant eagle. Just a typical Valentine's Day for the Thornberrys in Australia.
S3 · E17Hello, Dolphin! 2001-02-19
Location: Shark Bay, AustraliaNigel and Marianne are on a dangerous assignment to film some tiger sharks while Eliza goes swimming with some dolphins. Meanwhile, Debbie gets dumped by her e-mail boyfriend Sven. When the kids take a boat out with the dolphins to swim in the deep sea, they may get some unexpected visitors.
S3 · E18April Fool's Day 2001-04-01
Location: Okavango Swamp, BotswanaIt's April Fools day, and The Thornberrys are trying to outdo each other by way of April Fool's jokes. At first it's a lot of fun, but when Tyler and Eliza encounter some quicksand and a lion, will they learn not to cry wolf? Meanwhile, Nigel coaches Debbie for her Physical Education courses.
S3 · E19Gem of a Mom 2001-05-10
Eliza and Debbie embark on a dangerous trek in search of precious gemstones.
S3 · E20The Anniversary 2001-05-14
Mt. Fuji, JapanGrandpa Frank marks the occasion of his 50th wedding anniversary by throwing caution to the wind and joining Eliza on a rigorous mountain climb.
S4 · E1The Origin of Donnie (1) 2001-08-18 · 24 min
Location: Borneo, IndonesiaThe Thornberrys are preparing for Donnie's ""birthday"" party in Borneo when one crisis after another happens. Grandma Sophie decides to visit the same day Nigel and Marianne must capture a wild orangutan on film or the foundation will cut their funding.
S4 · E2The Origin of Donnie (2) 2001-08-18
Location: Borneo, IndonesiaDonnie searches the jungles of Borneo for his ancestry, causing Eliza to worry that he will break ties with the Thornberry clan.
S4 · E3The Origin of Donnie (3) 2001-08-18
Location: Borneo, IndonesiaA huge fire strikes while Eliza and Darwin search for Donnie, Nigel and Marianne come across poachers, and Debbie and Grandma Sophie get taken in by a native tribe.
S4 · E4The Origin of Donnie (4) 2001-08-18
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.
S4 · E5The Trouble With Darwin 2001-10-31
Location: TanzaniaThe Thornberrys are in Africa for the opening of a new chimpanzee sanctuary which will also be attended by Jane Goodall, famous for her work with primates. When Eliza meets her and introduces her to Darwin, Dr. Goodall tells her that she disapproves of domesticated chimps. Will Eliza be able to convince her that Darwin WANTS to stay with the Thornberrys? Meanwhile, when poachers trap Eliza and Darwin, will Dr. Goodall, Nigel and Marianne be able to rescue them?
S4 · E6Hot Air 2002-06-01
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?
S5 · E1The Wild Snob-Berry 2003-02-03
Geographical Location: AlaskaAt 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.
S5 · E2Ice Follies 2003-02-04
Geographical Location: Alaska
S5 · E3Fool's Gold 2003-02-05
Geographical Location: Yukon-Charley Rivers National Park, AlaskaEliza 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.
S5 · E4Clash and Learn 2003-02-06
Geographical Location: Bethel, Alaska
S5 · E5Sir Nigel (1) 2003-03-30
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.
S5 · E6Sir Nigel (2) 2003-03-30
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.
S5 · E7Look Who's Squawking 2003-04-04
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?
S5 · E8Eliza Unplugged 2004-06-11
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?