The Last Train.

The Last Train is a British six-part post-apocalyptic television drama serial first broadcast on the ITV network in 1999. It has since been repeated on ITV2 in 1999/2001 and on numerous occasions on the UK Sci-Fi Channel. The serial was written by Matthew Graham and produced for ITV by Granada Television. In the United States, the Fox Network purchased the rights to produce a new version of the series soon after its original UK transmission. Retitled The Ark, the idea did not progress beyond the pilot stage. As of May 2013, the series has not been released on DVD or any other format, and has never aired in the US.