SWR is going to air two episodes of Eisenbahn-Romantik on the California Zephyr on July 1st and 8th, but they are available on the Internet in advance.

Unfortunately there is relatively much speaker text and interviews are done with voice over, meaning that it is an advantage if you can understand spoken German. If you don't, just enjoy the scenery of a specatacular train ride from Emeryville on the San Franciso Bay to Chicago.

Part 1 and part 2.