''Murder on the Orient Express'', or ''Murder in the Calais Coach'', is an Creator/AgathaChristie detective fiction murder mystery first published in 1934.

Literature/HerculePoirot, the famous Belgian detective, is ready to return from a case in Syria when he is snowbound on the Orient Express. He is disturbed in his sleep by dead quiet and a passing figure in a red kimono, and when he awakes, the contemptible Samuel Ratchett is found having been stabbed 12 times to death. Poirot discovers he was actually a notorious American gangster, who had kidnapped and murdered a three-year-old heiress. The mystery begins to unravel as he discovers that the passengers have connections to the murdered man and the family of the child that man murdered.

[[TheFilmOfTheBook The Films of the Book]]:
* A [[Film/MurderOnTheOrientExpress1974 film adaptation]] was made in 1974, directed by Creator/SidneyLumet and featuring an AllStarCast.
* Another one, as a MadeForTVMovie, in 2001.
* Once more, in 2010 for ''Series/{{Poirot}}''.
* A [[Film/MurderOnTheOrientExpress2017 new film adaption]] directed and starring Sir Creator/KennethBranagh is currently scheduled for a 2017 release by Creator/TwentiethCenturyFox, and also features an AllStarCast.

'''Warning: ''Many'' unmarked spoilers are below, as the plot is extremely [[ItWasHisSled well known]].'''

!! The original novel and the 2001 movie provides examples of the following:


[[folder:In the original novel]]
* AdultFear: The first few minutes of the movie -- and the motive for Ratchett's murder -- are horrifying on their own, but they might be especially hard on parents.
* AmbiguouslyJewish: [[spoiler:The sisters Helena and Sonia Goldenberg, as well as their mother, who uses a stage name. Poirot briefly speculates on this.]]
* AssholeVictim: Ratchett's portrayed as a terrible man, so there isn't much sympathy when he is killed. We find out that he's so deserving of his fate that Poirot eventually lets his murderers go. This trope is exaggerated here.
* TheBadGuyWins: Zigzagged. It depends, to a large degree, on your definitions of "bad guy" and "win".
* BewareTheNiceOnes: [[spoiler: The Armstrong family and household are all very decent, good people who go to great lengths to bring Ratchett to justice.]]
* BittersweetEnding: While the murderers do get off scot-free, that's because even Poirot agrees that Ratchett's crime against the Armstrong family (whom the killers all had connections to) had been paid back justly, with interest.
* BusmansHoliday: What's Poirot doing on his vacation? Investigating a murder.
* TheButlerDidIt: [[spoiler:He was ''one'' of the people who did it, that is.]] Also spoken word-for-word, but as part of a RunningGag by the line owner always implicating the most recent interviewee.
* ClockDiscrepancy: The broken watch also appears -- and Poirot points out that the killer wants him to think that the murder happened at that time.
* ClosedCircle: Not only are they on a train, but trapped in a snowdrift.
* DistinguishedGentlemansPipe: Colonel Arbuthnot smokes a pipe.
* DownerBeginning: ''DAISY FOUND SLAIN.''
* {{Eagleland}}: The portrayal of the U.S. makes it obvious that Christie didn't know very much about it. For example, Poirot says that it is "obvious" that the Hungarian ambassador stationed in Washington D.C. must have been acquainted with the Armstrongs, a prominent family from Chicago.
** Caroline Hubbard embodies this whenever the opportunity presents itself. Then again, it's all an act.
** The Americans are also referred to as subjects rather than citizens. Of course, it ''is'' Poirot and Bouc doing this, so it's reasonable to assume they might not be aware of the distinction or consider it to be important.
*** The French translation corrects this.
* EnclosedSpace: Being snowed in was the only reason the crime wasn't a total success.
* EverybodyDidIt: Everyone on the train except the detectives is part of an elaborate conspiracy to execute the victim. The original idea was to provide themselves with an interlocking net of alibis, such that guilt could never settle on any one of them and it would be assumed that someone from outside the train did it. If it hadn't been for a ClosedCircle snowdrift cutting off the hypothetical murderer's escape, it might have worked. Moreover, the presence of all the suspects is a clue in itself: the murder takes place during a "dead season" for the railway, and yet ''every'' berth in the sleeping car is occupied.
* EverybodySmokes: Mentioned a ''lot'', as a pipe-cleaner and used matches are among the clues found in the victim's cabin, so Poirot asks about suspects' smoking habits.
* EveryoneIsASuspect: Deconstructed. [[spoiler:Many murder mysteries set up the plot so that every character had a motive; but why would someone be in a situation where everyone in the vicinity has a motive to kill them? It makes sense ''if'' the whole situation is the result of a conspiracy plotted by all the people with a motive to bring the victim among them.]]
** The trope plays pretty much straight too. The only characters who are not suspects are Poirot himself, who was hearing some of the key events of the murder taking place and was asleep through others; and M. Bouc and Dr. Constantine, who were incapable of being in the place of the murder at the time of the murder.
** When Ratchett first speaks to Poirot, he claims that he has enemies. Poirot notes that a man in a position to have enemies is unlikely to have only one. TheReveal is that there was indeed not "only one" killer.
* FromACertainPointOfView: How Princess Natalia Dragomiroff explains everything.
* FunetikAksent: Mrs. Hubbard, the Amurrican headed to Parrus.
* GenreSavvy: Poirot notes in the novel, after dusting the crime scene for fingerprints, that he doesn't expect such a search to tell him anything --no criminal would be that sloppy, nowadays, what with the overabundance of mysteries where fingerprints are plot points.
* GoodIsNotSoft: [[spoiler: The Armstrong family and household was very loving and loyal. Cassetti paid a heavy price for what he did to them.]]
* HeroicSacrifice: [[spoiler:Though all the passengers played a part in the murder (such that no-one knows who really struck the killing blow), Linda asks Poirot to just punish her and let the others go free, though it means she must suffer alone. He just lets everybody get off scot-free instead.]]
* JustTrainWrong: The book cover used for the page image seems to feature a London and North Eastern Railway B1, which, if you couldn't tell, belongs in the United Kingdom and ''not'' the normal treading ground of the [[RealLife real]] Orient Express. A more recent book cover went one further and featured a photograph of a Canadian steam locomotive.
* TheKillerBecomesTheKilled
* TheKillerWasLeftHanded: One clue Poirot notices is that the victim was stabbed by both a right handed and left handed person.
* LetOffByTheDetective: With the victim being an AssholeVictim of the highest order, Poirot rationalises that his murder meant justice was done. Although he reveals the murder conspiracy, he also offers an "out" by coming up with a plausible enough explanation involving an unknown assassin that doesn't incriminate the guilty parties. Those in authority accept this explanation rather than go through the political, legal, and publicity nightmare of prosecuting twelve people (some of whom are wealthy and powerful) for the murder of said AssholeVictim of the highest order.
* MamaBear: [[spoiler: The real mastermind of the affair was Linda Arden, a.k.a Mrs. Hubbard, who did it to avenge her daughter and granddaughter.]]
* MassiveMultiplayerScam: All of the suspects conspired together to murder the victim.
* MotorMouth: Mrs. Hubbard. Poirot is exasperated by her nonstop chatter, and has to beg her to keep her testimony brief.
* [[MultinationalTeam Multinational Cast]]: A French train crew, plus a few English, some Americans (one Italian-born), a Swede, a German, a Russian princess, and a Hungarian diplomatic couple, plus a Greek doctor and a Belgian detective and Wagon-Lits Company director. [[spoiler: And every nationality but the last three conspired in the killing.]]
* MyGodWhatHaveIDone: Hinted at by Poirot who is not exactly happy with his SadisticChoice.
* NiceGuy: M. Bouc[=/=]Signor Bianchi. He was generous enough to offer Poirot a free first class ticket.
* OccamsRazor: Poirot opts for the simpler explanation, knowing it's also the false one.
* OffOnATechnicality: How Ratchett managed to walk free after the killing of Daisy Armstrong. He still recognised that the public would have torn him apart the moment he left court, hence why he fled America and changed his name.
* OneDegreeOfSeparation: The passengers all are closely connected.
* OrientExpress: Obviously.
* OrgyOfEvidence: Not only are there a dozen suspects with a connection to the victim, but there are also a misplaced match, a pipe cleaner, a handkerchief, a button from a railway worker's uniform, a watch broken at entirely the wrong time, and sightings of a woman in a red kimono. Poirot, to his credit, dismisses most of these fairly quickly as {{Red Herring}}s.
--> '''Poirot''': "There are too many clues in this room."
* PapaWolf: [[spoiler: One of the murderers was the conductor Pierre Michel, the father of the Armstrong family maid who committed suicide by jumping out of the window after being accused of the crime.]]
* PayEvilUntoEvil: The victim had been guilty of the kidnapping and murder of a small child years before. [[spoiler:Poirot finds the man is so deserving of his murder that he decides ''not'' to turn the murderer over to the police, and even offers them a theory of how the murderer escaped the train that is as plausible as it is false.]]
%%* PoirotSpeak
* ProperLady: Mary Debenham.
* ReasonableAuthorityFigure: Monsieur Bouc[=/=]Signor Bianchi. [[spoiler:He was the one who suggested letting the passengers off the hook, since their victim was truly deserving]].
* RedHerring: Literally referred to by Poirot during TheReveal: He points out that the Mafia member and the red kimono were just "red herrings to confuse and deceive him", and even describes the night of the murder as the "night of the red herrings". See OrgyOfEvidence.
* {{Retcon}}: The late Colonel Armstrong's first name is alternately given as Toby, Robert, and John depending on the adaptation.
* RiddleForTheAges: Poirot never ''does'' figure out [[spoiler: who wore the scarlet kimono. He deduces its ''owner'' is the Countess, but he also concludes she never left her compartment, so somebody must've borrowed it in order to lay that false trail.]]
* RippedFromTheHeadlines: The kidnapping and murder of heiress Daisy Armstrong is very much based on the Lindbergh kidnapping case.
* RunningGag: "He/she did it!" after Poirot has interviewed one of the suspects.
* SandInMyEyes: The reaction that the snow was dazzling a suspect's eyes actually turns out to be a clue.
* ScrewTheMoneyIHaveRules: Poirot refuses thousands of dollars to help Ratchett, sensing he is a a very shady character. It proves to have been in his best interest to have done so.
* SeamlessSpontaneousLie: [[spoiler: Everyone on the train was a part of the murder. They had to make up several lies to throw Poirot off their trail. This was something like a dozen people. That kept up a lie under the scrutiny of Poirot. On a snowbound train in the middle of nowhere.]]
** [[spoiler: Though not so much spontaneous, as they intentionally planned their stories so that pretty much everyone had an alibi with someone who would have no reason to lie about it (who would suspect Arbuthnot and [=MacQueen=] to be in it together, or Mrs. Hubbard and Greta, or -- especially -- Foscarelli and Masterman, who pretend to actively ''dislike'' each other to suggest that neither would cover for the other one). And the stories ''do'' have flaws, just not immediately obvious ones.]]
* SherlockScan: An odd example -- Poirot is somehow able to intuit that a suspect previously worked as a cook thanks to his "nose for fine dining."
* SnowedIn: The train is stuck on the tracks because the mountain passes are blocked with snow.
* SpannerInTheWorks: Monsieur Bouc [=/=] Signor Bianchi threw the whole plot off balance with a simple act of generosity to one of the world's finest detectives.
* SympatheticMurderer: All the people seeking vengeance for the murder of little Daisy Armstrong.
* ThrillerOnTheExpress: TropeNamer, along with the numerous examples that use the title format for a reference.
* ToBeLawfulOrGood: The story's dramatic crux. [[spoiler:Was it right for the twelve to kill a clearly guilty murderer, given that he'd already bribed society's court system to ignore his crimes? Eventually, Poirot chooses Good.]]
* UndercoverCopReveal: Cyrus Hardman explains to Poirot that he is a private detective and therefore has a fake passport. [[spoiler: However, he conveniently avoids to say that he also used to be a cop and was involved in the investigation of the Armstrong case.]]
* UnwittingInstigatorOfDoom: Not completely unwitting, since Cassetti obviously meant to do great harm by his kidnapping of Daisy, but killing her (and pretending she was still alive to get the ransom money) led to a whole slew of FromBadToWorse occurrences in and around the family -- the revelation that Daisy was already dead caused her mother to have a miscarriage and die, her father then killed himself, and the innocent family maid also killed herself when accused of the crime. Generally, the entire family and everyone connected to them had their lives ruined by this one act, and it is this as much as what happened to Daisy herself that motivated the murderers in their quest for justice.
* WhoMurderedTheAsshole: The train was full of passengers who had reason to off the victim. [[spoiler: And all of them did.]]
* WoobieDestroyerOfWorlds: [[spoiler:A train full of them, no less]]. [[spoiler:They've all]] suffered for years because of Cassetti[[spoiler:/Ratchett]], which only went FromBadToWorse when he got OffOnATechnicality. After that, you really can't blame [[spoiler:them]].
* YouNeverAsked: The solution to the mysterious handkerchief with a Н on it. It involves the Cyrillic alphabet and Princess Dragomiroff's first name.
* YouSaidYouWouldLetThemGo: Cassetti kills three-year-old Daisy just after the ransom had been paid and flees the country. [[PayEvilUntoEvil He gets what he deserves.]]
* ZigZaggingTrope: TheBadGuyWins. Trust us, the "bad guy" and "wins" parts are tossed every which way.

[[folder:In the 2001 film adaptation]]
* JustTrainWrong: This version didn't even bother using Wagon-Lits carriages, instead using a train of British Pullman lounge cars. Ironically, one of them, named "Ibis", was used as a dining car on the Simplon-Orient-Express (the Orient Express Poirot travels on) between Paris and Venice for a couple of years in the 20s.
* PrettyInMink: This adaptation had a fur stole at the end.