In the final episode, vet Arga sets out to rescue a newly orphaned one-year-old orangutan from a remote village, but when she arrives back at the school, the orphan is found to have a broken wrist. Meanwhile, the release candidates have passed all their health checks and embark on the 24-hour journey by road and river back into the wild. Elsewhere, 'Big Boy' Beni has a gum infection and is put on an even stricter diet, which means his beloved bananas are off the menu, and it's an extremely emotional moment for staff when five adult orangutans are at last set free in the wild. Last in the series.