The race to Singapore has begun and the five teams head out of Delphi to their next checkpoint, Baku, the capital of Azerbaijan. It is a journey that will see them leave behind the familiarity of the west for the exotic and unknown of the east.

As five teams become four, they are now more focused than ever on reaching the final destination of Singapore. They depart Baku, the capital of Azerbaijan on the third leg of the race, taking them across the vast deserts, mountains and Silk Road cities of Central Asia to the ancient capital of Uzbekistan, Tashkent.

After nearly a month on the road together, relationships are coming under increasing pressure in what is the most challenging leg of the race to date. With vast distances to cover to the checkpoint, the ancient village of Huangyao, budgets are running low and emotions are high.

The remaining four teams head through the forests and bustling metropolises of Cambodia and Vietnam, and the final checkpoint before Singapore, the island paradise of Koh Rong. Father and son Darron and Alex have a whopping 22-hour lead.

After twelve thousand miles, two continents, twenty-one countries and four seas, the finish line is in sight, as the four teams complete the final leg of the journey. As the teams race one-and-a-half thousand miles down the Malaysian Peninsula to Singapore, seven weeks on the road is taking its toll.