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Oskar Westerlin and Nicolay will take part in the World Cup in desert running in Abu Dhabi - also known as "the world's hardest half marathon". One of them never makes it to the start.
Christina Vukicevic Demidov sacrifices fingers and toes to beat Nicolay in ice swimming. The challenge is to swim 200 meters in Sweden's coldest river.
Cengiz Al and Nicolay drive completely beyond their abilities in New Zealand's riskiest motorsport.