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Six Brits who are living with obesity continue their fact-finding global journey. In Tonga, the group meet the crusading Ofeina and reluctantly embrace the traditional raw fish diet.

Take a look at how New England's fiesta is created by the battles that occur between the trees and the forests's inhabitants.

Gregg Wallace arrives at a cheese factory in Gateshead in order to explore how they produce 3000 tonnes of spreadable cheese every year.

Steve Backshall engages with some of the biggest and most bizarre predators on the planet through stunts, experiments and CGI.

Steve searches for bait balls, which are among the most spectacular events. Additionally, although they can be seen from space, these elusive wildlife gatherings are difficult to locate.

People living in Alaska talk about their daily struggles and explain the different techniques they use to survive in a sub-zero-degree environment.

The filmmaker explores the journey of the mighty Zambezi, Africa's wildest river. It floods across endless plains, fueling the migration of 30,000 wildebeests and turning villages into islands.

Joanna Lumley travels to Iran where she delves into its ancient architecture and rich culture as she uncovers the influence of Persian Empire in shaping the nation.

The hosts visit some of the biggest food production units in Britain and share details about the various processes that take place inside these factories.

Paddy enjoys the holidays at a Belgian sweet factory while Cherry learns how white chocolate is made for Paddy's seashells.

This is Sport - Fishing Category.

In Texas, the tourists are shocked to find a whole industry for overweight residents but it's a struggle to find simple fresh food. And tensions in the group finally boil over at a barbecue.

David Attenborough potrays the efforts of numerous conservation advocates who risk everything in order to rescue wildlife.

Joanna Lumley explores Uzbekistan and Kyrgyzstan, Silk Road cities, Tamerlane's legacy and contrasting modern and traditional life.