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Hunger and disorganisation is causing the group to fragment. Lauren and Beth make a push for leadership but Jaime and Belinda push back.

Bear meets the men and women who made it through six weeks on a Pacific island, to see how they coped battling hunger, thirst, and each other, in one of the biggest tests of their lives

After four weeks on the island, the group have collectively lost almost 30 stone. Can Aran and Jacqui make a killing with a dangerous caiman crocodile and provide food for all?

Bear Grylls examines how the two groups from different generations survived their five weeks as castaways. Was it the wisdom of age or the energy of youth that proved most valuable?

Starving and seriously dehydrated, the group leave camp looking for water. They find two pigs, but can't agree whether to adopt them, or eat them.

Bear Grylls abandons 14 women on a desert island in the Pacific. As night falls on Day 1, they make camp in the jungle - at the mercy of deadly creatures and voracious sand flies.

The extreme conditions are taking their toll, with the women on the brink of starvation. Lauren, Beth and Belinda go pig hunting in the jungle.

It's almost four weeks into the experiment and the women are entering dangerous medical territory. They're given a 36-hour deadline to turn things around.

After five weeks on the island, the men are low on food and energy. They make a last bid to hunt for food before Bear arrives to take them back to civilisation.

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The islanders face mother nature at her most violent and brutal. Having endured a series of torrential downpours which have ravaged their campsite, unknown to them a hurricane is brewing 100 miles to the north.

The men swim ashore. Hammered by a succession of tropical storms, they must find a safe place away from deadly scorpions, snakes and caiman crocodile. And less than a week in, a fierce row breaks out.

The camp has split in two and is dangerously low on water. As the main group head into the jungle, looking for lost members, they're in for a nasty surprise.

Malnourished, exhausted and under pressure, the group turn on each other. Vic and Sam argue, while a fishing venture goes disastrously wrong for Will.

The men come face to face with a fearsome predator. And, as the group's body weight and energy levels plummet, there's division and conflict in the camp.

The men build a raft to go fishing. But, as Vic gets dragged towards razor-sharp rocks, he faces a life and death struggle to turn the raft around.

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In search of much-needed food, Barnes decides to risk strong currents and riptides on a journey by raft to a nearby island. But the voyage has disastrous consequences.

After three weeks on the island, the castaways are malnourished. Still living at opposite ends of the same beach, the wealthy and less well-off teams finally put their differences aside in a joint hunting expedition.

Facing their last week of isolation, the two camps decide to settle their class issues and battle the high seas, in a joint bid to raft to the neighbouring island. Can they bury their differences before Bear arrives.

Bear Grylls arrives on the island eager to get the stories behind the castaways' class war and their often dubious survival strategies.

With the old and young living side by side, the islanders hope to hit their stride. But hunger and frayed tempers lead to bust-ups as the islanders turn on one of their own.

After being dropped off on the island by Bear, the men are in danger of being overwhelmed by the tides. Battling through the dense undergrowth, the enormity of the task ahead dawns on them. As they try to get to know each other, daylight is quickly fading and tempers fray as doubts set in during the search for shelter for the night. With dehydration and hunger taking hold, the men are up against it. They need to find water and make fire or their time on the island will be over. The battle for survival is on.