The latest episode - Koriyak Endurance Racing
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Watch our exclusive interview with Murray and find out what it was like to train for the Koriyak Endurance Race.
Read all about episode six and have your say.
Follow the journey our athletes have taken using the location explorer.
BBC Three 01:15 25 Nov 2008
More info:31 days left to watch
Six intrepid athletes travel the world to compete against the most remote tribes on earth at their own sports.
Week six and our athletes must tred lightly in the long distance race over unpredictable snow.
Production Co-ordinator Chris O'Donnell takes us behind the scenes in Kamchatka.
I'm always going to think positive and hopefully that positivity will get me to the end of the race.
Murray - Series two athlete
An exclusive look at the Philippines where the guys compete in Sikaran kick-fighting .