Joanna Lumley embarks on the world's greatest train journey for this epic documentary series. The series sees Joanna set out to cross over 6,000 miles, from East to West, making use of the Trans-Siberian Railway. Departing from Hong Kong, Joanna travels through China, Mongolia and Russia taking in an immens panorama of vistas and cultures, people and places, before her final arrival in Moscow. By travelling in the opposite direction from most travellers on the Trans-Siberian railway, Joanna can begin her journey in Hong Kong, where she spent her childhood. At the end of her journey at Moscow's Central Station, Joanna will visit the location of a photo-shoot she did while modelling in the 1960s.