In this edition, Karl Pilkington travels to Australia to go swimming with dolphins at some point, but - as has become customary - a squawking Ricky Gervais and a sniggering Stephen Merchant ensure the trip takes a different course. Before the 'dolphin' encounter, Karl takes part in a blindfolded kickboxing contest after a surprise stop in Thailand, and encounters hundreds of snakes later on his journey. The adventure ends with an opportunity to swim with the marine mammals - but it is actually Great White sharks that are underwater...