Joanna Lumley returns in a brand new four-part series as she undertakes her grandest and most challenging journey yet - a breathtaking 7000 mile odyssey from Venice to the Chinese border along what was the ancient Silk Road.

Explorer Levison Wood – famous for Walking the Nile, Walking the Himalayas and Walking the Americas – is taking on a new expedition in this four-part series: to cross the mighty Caucusus mountain range that lies between Russia and...