 More than 5 million visitors come to Australia s outback every year -- but hundreds need rescuing in this land of extreme heat, snake bites and cyclones.  Host Bear Grylls travels to Australia s Kimberley region, roughly the size of California and a mixture of huge scrub deserts, dry riverbeds and red sandstone cliffs full of deep gorges.  Bear puts himself in the position of a lost tourist to demonstrate how to prevent sunstroke, find bush tucker...and explain why drinking your own urine could save your life.  He also identifies what you can eat in the outback, including a crucifix spider.  During his journey, Bear builds a shelter in the middle of a lightning storm and confronts Australia s deadly saltwater crocodiles.