I'm one of the producers on the programme- working on series 2. It's really good to hear your views about it.
We're developing the ideas and thinking about doing a train driver version.
Where would you suggest is the toughest place to go?!
Wow - well congratulations on a thoroughly excellent series. Can't wait for the second!
A few I can think of would be:
South Africa - trains are used to repatriate refugees from Zimbabwe, who do everything possible to escape from the train before the border. Trains going the other way attract stowaways...
Algeria - although now heavily militarised and safe, the railways have a bloody history throughout the civil conflict in the country.
Pakistan - the Samjhauta Express links Attari in India with Lahore in Pakistan, and was set up as part of the peace accords in 1972. It's one of very few connections (by any means) between the two countries, and subject to high security.