Nuns don't wear high heels... A woman has disappeared into thin air, on a train no less. But when Iris Henderson reports it, nobody believes her. In fact, nobody on the train even knows who she's talking about. So, what gives? Is Iris crazy? Or is everyone else? This dilemma caps off a pretty solid run of Hitchcock's later British period that's seen him lock into his lane: suspense. So...how successful is this one? Can he keep us on the edge of our seat? We watch and find out!