Bear Grylls drops people off on desert islands in the Pacific and sees how they cope. Young is pitched against old to see which generation fares better when marooned. Tonight, the last two episodes of the series air, the first at 9pm. The 14 remaining contestants face their last week on the island. After five weeks there, the group are increasingly beleaguered as castaways. Straight after the final episode is Surviving the Island at 10pm, which will see Bear recap the series and return to meet the castaways to find out first-hand what they went through.