The brakes on crew member Claudio's motorcycle are destroyed, and the
team are forced to buy a new bike that proves to be just as
temperamental as the old one. In the Mongolian city of Ulan Bator, Ewan
McGregor and Charley Boorman are taken by Unicef on a tour of the
sewers. Later, their high spirits are quickly dispelled when they
discover their desired route through Siberia has become impassable.