Penguin chick Munch fights for his life when there's disease in the colony. When young male tortoise Football muscles in on 71-year-old Bert's harem, the keepers bring in two Swedish female tortoises.

Four of Chester's orangutans go missing. The dominant female meerkat faces a power struggle with her own daughter. Can bull elephant Aung Bo help provide a baby to keep lone youngster Nandita company?