A 1938 film starring Margaret Lockwood and Michael Redgrave, ''The Lady Vanishes'' is arguably the last great film directed by Creator/AlfredHitchcock before he went off to Hollywood. After receiving a nasty bump on the head, Iris (Lockwood) meets Miss Froy, a nice middle-aged lady on board a train travelling through Bandrika, a fictional country somewhere in central Europe. They get on nicely for a while, when suddenly... the lady vanishes ([[ExactlyWhatItSaysOnTheTin what a twist]]). Iris and the caddish-yet-loveable Gilbert (Redgrave) promptly try to locate her - but nobody seems to remember seeing Miss Froy. Did Iris just make her up? Or is there foul play at work?

All right, there ''is'' foul play. But there's also a ScrewballComedy relationship between Iris and Gilbert. And two hilariously over-the-top Englishmen. This is probably one of Hitchcock's nicer films - think ''Literature/TheThirtyNineSteps''.
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!!Tropes that occur in this film include:

* AffablyEvil: Dr. Hartz seems like he's genuinely a nice guy, even despite being a Nazi assassin. He even gleefully wishes the heroes good luck at the end after they escape him.
* ApatheticCitizens: Half the people who say they never saw Ms. Froy aren't even part of the conspiracy, they just don't want to get involved for reasons of their own.
* ArrangedMarriage: Iris is supposed to enter into one as soon as she returns to England. {{Defied| Trope}} when she decides to marry Gilbert instead.
* BadHabits: Dr. Hartz' cohort dresses as a nun throughout the movie. She makes a mistake in her disguise, however: she wears high heels, which would never be worn as a part of a real nun's vestments.
* BlackmailIsSuchAnUglyWord: [[spoiler: Miss Froy thinks "spy" is an awful term]].
* CassandraTruth: The movie shows shades of this early on as Iris tries desperately to convince everyone that Ms. Froy exists.
* ChekhovsGunman: The guitar player near the beginning.
** ChekhovsGun: Similarly the tune he is playing, as it's the code that Froy was [[BringNewsBack bringing home]].
* CoverIdentityAnomaly: The clue that gives away Dr. Hartz's assistant: real nuns never wear high heels as part of their vestments.
* CreatorCameo: Hitchcock of course. He pops up for a few seconds at the station at the end.
* DoomedDefeatist: Todhunter, who also proves to be TooDumbToLive.
* EvilAllAlong: Dr. Hartz, a kindly doctor who tries to help Iris out after Froy's disappearance. Oh, and he's secretly a paid assassin working for the Nazis, not to mention the one who kidnapped Ms. Froy to begin with.
* GenreShift: The 2013 BBC adaptation is a serious psychological thriller. That is not to say that the original 1938 film did not have a serious thriller plot, but it also contained a screwball comedy subplot and much more humor in general. In the original, the foreignness of many of the characters is played for comedy, while in the remake it is used to heighten Iris's sense of isolation and fear.
* HandOfDeath: A pair dispatches the guitar player.
* HeelFaceTurn: The nun who worked with Dr. Hartz. Apparently she's okay with all of the other things the Nazis have her do, but murdering a nice old lady (who happens to be a British spy) is [[EvenEvilHasStandards going too far]].
* ImpairmentShot:
** Iris on the train, after a flower pot has been pushed off a windowsill and hit her on the head.
** The 2013 BBC version uses this as a drugged Iris is being taken off the train.
* ImperialStormtrooperMarksmanshipAcademy: In the shootout during the film's climax several villainous mooks are killed while very few of the train's passengers are killed. Justified in that the people on the train had cover while the mooks that died were in the open. The passengers who died ([[DisposablePilot both conductors]] and Todhunter) were also in the open when they got shot to death.
* LetsGetDangerous: Caldicott and Charters spend most of the film being ''beyond'' useless. Then when they're finally convinced that the train is under siege by Nazis, they both grab guns and start putting up one hell of a defense.
* MacGuffin: The tune that Ms. Froy teaches Gilbert is actually a coded message. We never entirely learn the significance of it except that it has something to do with a treaty between two European nations.
* MissingTheGoodStuff: Caldicott and Charters spend the whole film looking forward to getting back to London for the end of a big cricket test match, only to find that it's been rained out.
* NeutralFemale: {{Defied| Trope}}. A fight scene between Gilbert and one of the conspirators starts out with Iris standing on the sidelines before Gilbert tells her "don't just stand there like a referee, cooperate." She does help and actually ends up being the one to disarm and knock out the bad guy.
* TheRemake: By Hammer ( yes, ''[[HammerHorror that]]'' Hammer) in 1979. It bombed spectacularly.
** Another one was made in 2012 and broadcast by the BBC in 2013.
** Unofficially, the JodieFoster film ''{{Flightplan}}'' bears quite a few similarities.
* {{Ruritania}}: Bandrinka. They stop in two towns, Dravtka and Morsken.
* SeriousBusiness: Murder, disappearances, soldiers with guns, ho hum. But if Caldicott and Charters can't find out today's cricket scores? Really, that's too much!
* ShoutOut: To Franchise/SherlockHolmes. When Gilbert tells Iris his theory about the disappearance he puts on a deerstalker hat and picks up a pipe. He even refers to Iris as "Watson."
* SpannerInTheWorks: Iris isn't stupid, but she is completely unaware of the conspiracy until the end. She still manages to destroy the conspiracy just because she won't stop insisting that Ms. Froy exists.
* SuitWithVestedInterests: Caldicott and Charters form a peculiar example from before the age of the monster attack movie but their self-interested obliviousness matches well with the behaviour of a tourist-town mayor not wanting to close the beaches on the fourth of July... but for cricket.
* ThoseTwoGuys: Caldicott and Charters.
** Which became ThoseTwoActors for Basil Radford and Naunton Wayne. Not only did they reprise their roles two years later in Carol Reed's ''Film/NightTrainToMunich'', but they appeared together (as differently-named but virtually identical characters) in numerous other film and radio productions over the next few years.
* ThrillerOnTheExpress
* TooDumbToLive: The train car that the heroes are on has been diverted to the middle of nowhere and surrounded by armed Nazi soldiers. It's been made clear already that the soldiers aren't interested in working things out, which the passengers discovered when one of them tried to talk to the soldiers and got shot in the hand. Todhunter, in spite of all of this, still tries surrendering. He is promptly shot dead.
* WorthyOpponent: In a scene that's quite weird to watch these days, Nazi spy Dr. Hartz cheerfully accepts his defeat and wishes our heroes good luck.
* YouImaginedIt: Iris gets this from just about everyone over Ms. Froy's disappearance.
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