In Didcot, Peter Snow is joined by train lovers, collectors and enthusiasts across Britain. Peter challenges Ian McMillan to write a poem about the Flying Scotsman.

Peter Snow and Dr Hannah Fry present live from Didcot Railway Centre, where the focus is on diesel locomotives, from Class 37s to the Intercity 125.

Dr Hannah Fry and Peter Snow look towards the future of rail travel. Hannah explores how the timetables work and whether they can squeeze in extra capacity in the future.