Four famous duos have travelled nearly 6,000 km, hitchhiking through mountain towns, foraging in dense jungles, and battling challenges they never imagined, as contestants in Celebrity Race Across the World.
What began on the sun-soaked easternmost tip of Mexico is about to come to a close on Thursday night as the teams race toward the windswept Península de La Guajira in Colombia, the series' final checkpoint.
The budget, £950 per person - the equivalent cost of flying the route - was one limitation, but what else made the trip the challenge of a lifetime?
In the lead-up to the race, Tyler West and Molly Rainford had a flicker of apprehension.
While the couple knew each others' strengths and weaknesses inside out, life in the public eye often left them feeling like "passing ships in the night."
