The Island with Bear Grylls - Season 4

Old and young go head to head in the new series of Bear Grylls' survival epic. Which generation copes best marooned in the Pacific when pushed to the limits of human endurance?

The young group's campsite turns into a swamp in the rain. They join up with the olders but immediately there's a row. Freddie kills a snake. And Kaggy goes on a turkey hunt.

With old and young now living side by side, the islanders are hoping to hit their stride. But the lack of food is an ever-pressing concern, and tempers are fraying. Jordan is feeling out of sorts and then has a fight with Richie. The group are furious when Phil uses some olive oil to boost the fire rather than for food. And soon there's another bust up, bringing relations to breaking point. Could a shocking vote see the islanders turn on one of their own?

This time 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 future of the community is left hanging in the balance. Will Aran's resolve to stay be enough to influence the others? And the problems don't end there, with Karen and Jane determined to set up their own splinter group and fend for themselves.

After four weeks on the island, the group have collectively lost almost 30 stone and are increasingly beleaguered as they enter their last days as castaways. Karen is suffering more than the rest, with dangerously low blood sugar and diarrhoea. Bromance buddies Ben and Jager try fishing and then hunting for the island's elusive turkeys in the dense jungle. Aran and Jacqui stumble across a caiman crocodile - a vicious adversary, but rich in calories. Can they pass the ultimate test and provide food for all?

Survival expert Bear Grylls looks at how two groups from two different generations lasted five weeks on an uninhabited Pacific island. Marooned with only a handful of basic tools and the clothes on their back, the castaways had to endure extreme weather and stormy relations within the group. Bear returns to meet the castaways to find out first-hand how they did it. Was it the wisdom of age or the energy of youth that proved most valuable?