The Origin of Donnie (1) (S04E01)

Setting: Borneo, Indonesia. The Thornberry family is busy organizing a special celebration for Donnie's "birthday" in the heart of Borneo. However, chaos ensues as multiple challenges arise. To add to the frenzy, Grandma Sophie chooses the same day to pay a visit, while Nigel and Marianne race against time to film a wild orangutan, as failing to do so could jeopardize their funding from the foundation.