With no rest period between legs, teams are still racing and heading for Kostroma in central Russia. They face a nation v nation challenge and the last team to the mat surprises all, but will a twist at the pit stop save them?

From Portugal, teams travel to Croatia and the old city of Dubrovnik where they have trouble negotiating the old cobbled streets. The only Fast Forward in the series calls for an act of devotion that leaves a lasting impression.