Stanley Johnson, accompanied by his youngest son Max, sets off from China's far western border to undertake an epic Silk Road journey of some 5,000km to Beijing.

In 1961, Stanley Johnson set off from Oxford University with two friends bound for China. Their plan? To retrace the famous journey of Marco Polo from Venice to Beijing - but limited time meant they only got as far as the Chinese border. Now, 60 years later, Stanley finishes the final leg of his remarkable journey through China, now joined by his son Max. From the jaw-dropping high peaks of the Karakorum Mountains, through two great deserts, to the highlands of Inner Mongolia and finally Beijing - join Stanley and Max as they travel In the Footsteps of Marco Polo.