It's the last visit to Chester Zoo tonight as we look at the important rhino breeding that takes place there, with the numbers in the wild dwindling rapidly. In this episode, black rhino Kitani is introduced to new mate Magadi, but with injury a high risk during mating, keeper Babs is concerned that Kitani may struggle to defend herself, since she lost her horn after the death of her calf. Meanwhile, there's a surprise birth in the orangutan house, and older sibling Tuti has to fend for herself and set out on the road to independence.