Wildlife vet John Lewis is given a run for his money as he tries to sedate two excitable chimps. The recently rescued male capuchins get used to life together, and orang-utan Kai proves too energetic for her companions.

Alpha male Hananya shows his dislike for needles, while the other chimps have a banana-fishing expedition. Alison and Jeremy Keeling rehouse two capuchin monkeys in Hertfordshire, and there is an exciting development among the endangered gibbons.