Rail enthusiasts are a hardy lot. Whether it's enduring all kinds of weather to get that perfect picture, pitching in at the nearby preserved line, restoring engines, goods, and carriage stock, researching and reading about their favourite railway or engine class, they are dedicated, steadfast, and loyal.

Meet 'Diesel Dan' Settles, Chair of DOSE: Deltic Admirers (and) Steady Enthusiasts. Join Dan and his small but earnest band as they seek to save an example of an engine class most cherished. Daunting circumstances present themselves time after time; will they prevail in the end? Join them in their quest.