At last: an informative show for grownups that doesn't assume our attention span is so short that it has to cut back and forth from article to article; or remind us in great detail what we watched two minutes ago before the ads.
I'm not a railway buff but I'm hooked on this series; the presenter's passion reflects the love that has gone into building and conserving some marvels of the railway age and to some extent the same attention given to the modern railways.