Naomi Wilkinson continues her global adventure in search of nightmares of the natural world. This time she heads deep into the rainforests of Borneo where she heads off on a heart-stopping abseil into one of the biggest caves in the world, bumps into a brute of a bear with a serious bite, gets the creeps on a nocturnal big bug hunt, and becomes mum to a baby orangutan facing a nightmare of its own.