Over 5000 miles from the UK, the uninhabited islands are part of a remote archipelago in the Pacific Ocean.
The celebrities have to survive during the transition from the dry season to the rainy season. With hot and humid conditions, periods of sunshine and tropical storms, the celebrities will have to adapt to the changing weather.
It may look like paradise but looks can be deceiving; treacherous cliffs and headlands surround the island, occasionally giving way to sandy coves and beaches. The interior is covered with dense jungle and wet mangrove teeming with life - including insects, spiders, snakes and giant crabs.
Changes to the Local Environment
It was important that the natural habitat wasn't disrupted or damaged by the celebrities. It has been confirmed that the island has been returned to its natural state following the end of the experiment.
As extended periods of rain could not be guaranteed, water sources were added to the island to ensure the celebrities had access to enough water. However, the celebrities still had to find, fetch and purify the water - around 50 litres a day in total!
For the islanders to have a chance of survival they would have to fish for food. But rip tides, hidden rocks, stingray and stonefish mean that even fishing can be a risky activity.
Survival is impossible without water: the human body can survive 3 weeks without food, but only 3 days without water. In order to stave off dehydration the islanders would have to purify their water by boiling it over a fire.
The celebrities were abandoned with only the clothes they stood up in and some basic tools -which, for each group, included six knives, six machetes, fishing equipment, head torches, whistles, and a medical kit.
Flotsum and Jetsum
Scientists have estimated that there are 5 trillion pieces of plastic floating in the world's oceans. A huge variety of material becomes washed up on the shores of the Pacific islands every day, from food containers to flip-flops. Flotsam and jetsam provided the celebrities with a source of material that can be potentially helpful for their survival, but only if they have the wits and resourcefulness to adapt it.
Before going on the island, Bear organised for the celebrities to have two days of survival training. They learnt the basics of survival, from first aid to lighting fire and water purification to the humane dispatch of animals. They also received basic health and safety training.
Modifications to the Island
In order to keep the celebrities safe Bear ensured that there were enough indigenous animals and vegetation for survival throughout as long as they had the ingenuity to catch, kill or utilise the natural resources to last the course of the experiment. Modifications included introducing turkeys, caiman and yucca to the island. All are indigenous to the area.
Flora and Fauna
The yucca plant has a carb-rich edible root, which can provide the islanders with a vital source of carbohydrate, starch, calcium and vitamin C. Each yucca root has around 650 calories. To ensure the celebrities have the resources they need to survive, the existing yucca crop was supplemented, but the celebrities will still have to correctly find, identify and harvest the crop.
For the celebrities to survive they relied on the coconuts found on the island's perimeters although additional coconuts were added to supplement the natural resources of the island. Each coconut contains approximately 1000 calories and over 100g of fat as well as hydrating coconut water. Coconuts can also have a laxative effect, which could prove useful for the celebrities who are surviving on such a protein rich diet!
On the island there is a wide variety of edible fruits, including pineapples, spanish limes and the distinctive noni fruit. But the contributors will have to beware as some fruit on the island can cause dangerous stomach conditions and worse.
The seas around the island have a plentiful supply of fish, from small whitefish to stingray and even sharks.
An average sized caiman could provide a whopping 100,000 calories for the celebrities if they can catch and kill one. Caiman can grow to over 3 metres in length and have a mouth full of razor sharp teeth with jaws that can bite four times as hard as a lion! Caiman are indigenous to the area, but to supplement the existing population and ensure the survival of the celebrities,, additional animals were introduced to the island's mangroves.
In order to ensure that the celebrities have the resources they need to survive, several turkeys (an animal indigenous to this area) were placed on the island. They could provide a vital source of protein to the celebrities, but only if they can find and capture them in the thick jungle of the island's interior.
The most dangerous fish in the world can be found in the waters surrounding the island. Each stonefish has thirteen spines on the dorsal fin, which contain highly toxic venom that can kill in less than two hours. Its camouflaged skin makes it very difficult to spot, and even easier to tread on!
As dangerous as it sounds, the death apple is one of the island's biggest threats. The poison in one tiny apple can kill. In fact, it's so poisonous even standing under a death apple tree during a rainstorm can result in the run-off water dripping poison to those below causing the skin to crack and blister.
Boa constrictors are indigenous to the island. They are often to be found in clearings in the forest, exactly where the celebrities may be making camp. They can grow to 4 metres in length and can kill by suffocating their prey.
The celebrities will have to do battle with one of the island's most irritating predators - the sandfly. Though smaller than mosquitos their bite is said to be four times as itchy, and to make matters worse they bite multiple times in clusters, leaving their victims with a rash of painful red welts on the skin.
Health and Safety
Before the Experiment
Health and safety of the celebrities was the top priority. Before going on the island all the celebrities had a full medical and psychological assessment to ensure that they were fit enough for the physical demands of the experiment.
Safety of the Islanders
The celebrities were prepared for medical emergencies. Dr. Sara Kayat could offer initial medical support and had access to a full medical kit. In the case of serious medical emergency there was a support medical team based on a nearby island. A helicopter evacuation team was also onside - despite the remote conditions the helicopter could be on the island in 30 - 40 minutes.
As well as having their health and safety ensured while they were on the island, the celebrities received aftercare support, including access to the team psychiatrist, medical assessment and a diet plan.
The celebrities were required to fend for themselves on the island. The medical or safety team on a nearby island would only intervene in the event that they were called on or if there was a serious incident e.g. if the doctor in each group required medical support or in the event of extreme weather.
There were five experienced camera operators amongst the celebrities who had a specific responsibility to capture the experiment on film. They lived in exactly the same conditions as the other contributors and were part of the island community. The cameras and sound equipment were specially modified to survive the humidity of the tropical climate and the wet conditions.