For episode three of the Insight Guides Podcast we ask: Could a train be responsible for re-routing a country's political landscape? A network of railways connecting Moscow to Vladyvostok in Siberia, the Trans-Siberian is the longest railway in the world. Historian Christian Wolmar also believes it changed the course of Russian history, forever. We're here to find out.

The Insight Guides Podcast is hosted by Zara Sekhavati (@ZaraSekhavati) and produced by Jessie Lawson of Reduced Listening (reducedlistening.co.uk). This episode featured sound design from Louis Grace.