This show has had people gripped of a Sunday evening the last few weeks, but sadly we are now at the end of the series. Sir David Attenborough narrates this remarkable documentary series that is the BBC's first ever show to be shot in the Ultra High Definition format. In tonight's final episode we will get to see footage of wild animals that have made a home in cities, including leopards on the streets of Mumbai, peregrine falcons hunting among New York's skyscrapers, hyenas that live peacefully alongside the people of Harar and langurs in Jodhpur, which are regarded as having great religious significance by the citizens. The programme also examines how some animals are struggling to survive in urban environments, and questions how cities can be built to serve their needs as well as those of the human inhabitants.