Ten Little Niggers (1949)

Ten people are invited to a summer party on an island oft the Devon coast. They are an extremely varied group from a blustering major to a frigid spinster. The only thing they have in common is that they were each involved in a case of unexpected death. They soon find something very odd about their invitations, and then they start to die, one by one. But who is the murderer and where is he hiding.