The Lady Vanishes, BBC One
The rolling stock is more interesting than the characters in remake of vintage mystery
This story is mostly familiar from Alfred Hitchchock's 1938 movie, starring Michael Redgrave and Margaret Lockwood. Among the things it's best remembered for are the comic double act of Basil Radford and Naunton Wayne, playing the cricket-obsessed Charters and Caldicott trying to get home to England from somewhere in pre-war Europe to watch a Test match, and Dame May Whitty as the titular missing person, Miss Froy.
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