Hujan, the smallest orang-utan at the park gets to meet Tuan, one of the largest. However Tuan is more interested in RoRo than checking out the little orang. Stumpie Sam has a dental check-up and his decay causes dismay, vet Holly has her work cut out with this patient. The chimp team hope Toprish will fare better on the second attempt going into the outside enclosure and the spider monkeys high tail it when they discover challenging treats in their enclosure.