An amazing journey in Norway's Far North as Joanna Lumley pursues a lifelong dream to track down the elusive, stunningly beautiful Northern Lights - 'the true wonder of the world,' as she puts it.
In the first episode, Joanna heads to Beijing before joining the overnight train to Mongolia.
In Monglia, Joanna spends time with some nomads before heading for Siberia.
On the last leg of her train journey, Joanna crosses Siberia, visits Yekaterinburg, where the last tsar was murdered, and arrives in Moscow for her first visit since the 1960s.