A b&w film, probably 40s or 50s where a group of people are waiting in a farmhouse, in the countryside, for a train to come for them. There's been some sort of war or apocalypse. Must of been at least 25years ago when I watched it (so it must have been on television in the uk). I think the whole film takes place in the farmhouse and the garden/yard. As the film gets nearer the end they can hear the train (or whatever it is?) getting closer.