Christopher travels to Mumbai, where he talks to a a film icon and finds out about the city's secretive diamond network.
Christopher travels to Moscow to find out more about the city.
Christopher travels to New York, where he talks to billionaire mayor Michael Bloomberg and also learns what drives the iconic city.
Christopher travels to Rome to find out more about the city. He learns how the Eternal City is reshaping following the Berlusconi government.
Christopher travels to Los Angeles here he finds out about a changing movie industry and a city with a darker side away from the glamour of Hollywood.
Christopher is in London to find out more about the modern make-up of the city. He talks to Louise Mensch, Boris Johnson and Evgeny Lebedev.