During the fourth series of the TV show The Island with Bear Grylls there were two groups of participants of different age groups ; for the fifth series , there were two groups of people with different income levels .
In the fourth series , there were two sets of participants of different age groups , while in the fifth series , the two groups were of different income levels , with one group earning less than the minimum wage while the other earned an average of £100,000.For the first series , the participants had to survive for one month .