Discs do show sings of use but, as they are played, there doesn't seem to be any problem.
All 20 episodes from the second series of the documentary in which Michael Portillo traces historic rail journeys across America, taking as his travelling companion 'Appletons' Guidebook'. The episodes are: 'St. Louis, Missouri', 'St. Louis to Jefferson City, Missouri', 'Sedalia to Kansas City, Missouri', 'Kansas City to St. Joseph, Missouri', 'Lawrence to Topeka, Kansas', 'Dodge City to Lamar, Colorado', 'La Junta, Colorado to Pueblo, New Mexico', 'Canon City, Colorado, to Colorado Springs', 'Santa Fe to Acoma, New Mexico', 'Albuquerque, New Mexico to the Grand Canyon, Arizona', 'The Twin Cities, St Paul', 'The Twin Cities, Minneapolis', 'Red Wing, Minnesota to La Crosse, Wisconsin', 'Tomah to Portage, Wisconsin', 'Milwaukee to Racine, Wisconsin', 'Chicago, the Windy City', 'Chicago, US Rail Hub', 'Homewood to Champaign, Illinois', 'Mattoon, Illinois to Columbus, Kentucky' and 'Memphis, Tennessee'.