Episode 2 | Mind the Gap: London v the Rest

1: A Place to Live | Supersized Earth

Dallas Campbell climbs the world's tallest building and dives beneath Mexico City.

1: New York | The Greatest Cities In The World

Griff starts his search for the greatest cities in the Big Apple. Some grand public - and private initiative buildings illustr...

2: Revolutionary Paris | Filthy Cities

Dan Snow sniffs out the French revolution to explore how Paris was once buried in an inescapable stench.

2: The Way We Move | Supersized Earth

Dallas Campbell explores how we can travel further and faster than ever.

2: War | Welcome to Rio

A look at Rio's drug-trafficking favelas, being 'pacified' by the government's special forces ahead of the World Cup in increasingly violent incursions.

3: Industrial New York | Filthy Cities

Dan Snow looks at 19th century New York when migrants arrived in a city consumed by squalor, stench and soot.

3: Ingenuity | Welcome to Rio

This episode looks at the resourcefulness of some of Rio's poorest residents, revealing how favela residents exploit their opportunities.

3: Paris | The Greatest Cities In The World

Griff is in the French capital, object of great chauvinistic pride and vanity. Although resulting in a mind-boggling traffic mayh...

6: Urbanisation | World 2000

Can cities sustain the amount of people living in them? How can people improve them?

Accommodation in the City | World's Busiest Cities

Ade Adepitan visits a type of shared accommodation in Hong Kong that many are forced to live in due to extortionate housin...

Agriculture in the City | World's Busiest Cities

Dan Snow investigates the history of residents of Mexico City since the Aztecs.

Crime | World's Busiest Cities

Dan Snow investigates how Mexico City's police work from the sky.

Episode 2 | New York: America's Busiest City

A look at the astonishing daily systems that allow America's busiest city to function. Anita Rani, Ade Adepitan, Ant Anstead and...

Episode 2 | Return to Forgotten Britain

Twelve years after the series looking at some of Britain's hard pressed communities, Fergal Keane returns to Glasgow and Leeds to fin...

Episode 2 | Welcome to India

This episode follows three people as they attempt to make a living from turning the stuff others would call waste into an opportunity.

Episode 2 | Welcome to Lagos

This episode follows those who choose to live and work on the waters of Lagos Lagoon, including a father of 18 who lives in a house built on sti...

Episode 3 | Welcome to India

This follows three families as they search for a better life today and for generations to come.

Episode 3 | Welcome to Lagos

This last episode follows Esther, who lives in a scrap house on the beach in central Lagos. Her village has repeatedly been bulldozed by governm...

Forgotten Britain | Our World

Michael Buchanan meets people in Hartlepool in the North East of England to find out how government cuts have affected their lives.

Free Trade | World's Busiest Cities

The history of HSBC and banking in Hong Kong.