Following on from the show `Extreme Railway Journeys' which saw him embark on a number of trips overseas, Chris Tarrant returns with this three-part series that focuses on the impact the invention of the train has had on the United Kingdom. Through a series of visits to historical sites, Tarrant documents the evolution of Britain's rail infrastructure, learning more about the steam locomotive and its influence on the Industrial Revolution. The development of train travel as a popular mode of transport for workers and holiday-makers alike is also discussed.