

Season 4
Synopsis
Season 4 of The Wild Thornberrys (2001) is the short send-off — six episodes you can watch online on iFILM, and most of them belong to a single story the show had never tried before.
Four straight episodes, "The Origin of Donnie," take the family deep into the jungles of Borneo. The Thornberrys' feral foundling finally goes searching for where he came from, and Eliza fears that finding it will pull him away from them for good. A forest fire, poachers, the family split apart, and a village medicine woman who reveals what happened to the boy's parents. The two remaining episodes lighten up: primatologist Jane Goodall visits a new chimpanzee sanctuary in Tanzania, and the crew meets a Maori community in New Zealand.
This season trades the location-of-the-week format for emotion and backstory. A neat bridge toward the feature films. Stream Season 4 online on iFILM.
6 episodes
S4·E1The Origin of Donnie (1)
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)
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)
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)
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
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
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?
5 seasons
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