Michael Portillo crosses the Atlantic once more to ride the railroads of North America with his faithful Appleton's Guide to the United States and Canada. Amid breathtaking scenery, he encounters magnificent beasts, joins intrepid explorers and witnesses unique customs on an awesome 1,500-mile journey to recapture the excitement and promise of the 19th-century American Frontier.

In St Louis, Michael ascends America's monument to the Wild West, the astonishing Gateway Arch, the tallest free-standing monument in the United States, and makes a delightful discovery inside it. And on the banks of the Missouri River, he is invited aboard a magnificent replica of the original keel boat used for a historic expedition.