Robert Llewellyn finds out about the construction of high-speed train networks, meeting engineers at the Siemens factory in Krefeld-Uerdingen, Germany, who explain how the use of small electric engines located under the carriage floors helps trains to maintain speed on steep inclines. He also investigates the manufacturing process behind ballpoint pens.
| Name | Type | Role | |
|---|---|---|---|
| Rory Griffin | Director | ||
| Peter Chinn | Director |