The first series launched in spring 2019 and was the biggest new factual entertainment title on BBC Two since 2016 with the final episode consolidating at 3.2m viewers.
In these new series, pairs of travellers will race from the start line in one part of the world to the finish thousands of miles away - without the use of air travel or any of the trappings of modern day life.
They must navigate their way through the varied landscapes of countries at ground level, with only the cash equivalent of the airfare to their final destination.
A source told The Sun: "RATW has a cult following and became huge during the early lockdowns when everyone discovered series one then got hooked on series two...
"But because it takes so long to film they’re the only two series for fans to binge on. Everyone has been desperate for producers to do more, but because of the pandemic and all of the travel restrictions it’s just not been possible...
"But now they’re starting to gear up to send another lucky set of contestants on their travels in 2022."
Race Across The World is available to watch now on BBC iPlayer.