The Lady Vanishes (U)

To pass the time during a journey aboard the Trans-Continental Express, Iris Henderson befriends middle-aged English governess Mrs Froy, the woman suiting opposite her in the train compartment. Further down the track, Mrs Froy disappears without trace and when other passengers claim never to have seen the elusive governess, Iris begins to question her sanity. Soon, Iris and dashing stranger Gilbert Redman are embroiled in a frantic race against time to expose the truth.