The teams have reached the halfway mark in the 25,000 km race to Ushuaia. To reach the next checkpoint, they must choose to travel through either Bolivia or Chile.
The next checkpoint is the island of Ihla Grande, Brazil, positioned halfway between Rio de Janeiro and Sao Paolo. Teams must travel 3,600 km east across the continent, making it the longest leg of the race so far.
The populous Indonesian island of Sumatra must be travelled through by the teams. An ad-hoc transport system, limited accommodation options and virtually zero English spoken will all have to be endured by the travellers.
Setting off from Panama City, the remaining four teams take to the Caribbean Sea, but there are complications when a state of emergency is declared in the destination of their next checkpoint.