The actual Orient Express trains were no longer in existence at the time of shooting. However, the real Orient Express engine was used in the film although it couldn't travel very far. Only portions of the carriages still existed in museums, mostly in Belgium, and sometimes had to be recreated from real portions borrowed.
An 84-year-old Agatha Christie attended the movie premiere in November of 1974. It was the only film adaptation in her lifetime that she was completely satisfied with. In particular, she felt that Albert Finney's performance came closest to her idea of Poirot. She died fourteen months later, on January 12, 1976
Wendy Hiller was second choice for Princess Dragonmiroff. Director Sidney Lumet's first choice was vetoed by the producers. The role was also turned down by Ingrid Bergman who chose instead to play Greta Ohlsson, the somewhat crazy Swedish nanny, even if this part had fewer scenes than the part of the Princess. Ingrid Bergman had good instincts since she won an Oscar for the role.
Albert Finney, who was then 38 years old, was the third choice for the much-older Poirot. The role was offered to Alec Guinness who was unavailable as well as Paul Scofield. Special make-up was created to give Finney the appearance of the 55-60 year old beloved but peculiar Belgian detective.
The photo gallery on the German DVD by Kinowelt includes one photo hinting at a scene not used in the final film. It shows Bianchi in his bed on the train with Pierre standing beside him.
Virtually all of Ingrid Bergman's Oscar-winning performance is contained in a single scene: her interrogation by Poirot, captured in a single continuous take, nearly five minutes long.
A set of lyrics was composed for the main-title theme but was never used. The first line went, "Silky, there is murder in your eyes."
The final scene, in which Poirot shares his solution of the case, required more shots and camera angles than could be captured in a single take on the cramped set. The cast had to shoot the scene multiple times, as the required number of cameras didn't fit in such a small space. This was especially hard on Albert Finney, whose monologue was eight pages long.
Sound recordist Peter Handford pioneered the use of radio mikes in a feature film on this production. The microphones were concealed in table fittings.
After several disappointing film adaptations, Agatha Christie initially refused to sell the film rights to any more of her books, but EMI chairman Nat Coleman enlisted the aid of Lord Louis Mountbatten to persuade Christie to allow the filming of her 1934 novel. It turned out to be her favorite film adaptation of any of her books. Mountbatten was the father-in-law of the film's producer John Brabourne
Richard Widmark agreed to do the movie just to have the chance to meet the other stars.
Since Albert Finney's required many hours of make-up procedures before shooting each day and because he was performing in a stage play at the same time, he didn't have much time for his badly-needed sleep. A daily routine was developed where an ambulance arrived to pick-up the sleeping actor at his home, in his pajamas, carefully trying not to wake him up. During the half-hour commute to the studio, the make-up artists would begin the rough work on his face. The rest of the fine detail work was completed at the the studio on a still sleeping Finney.
The luxury food that is inspected and carried aboard the train early in the film had been stolen from the set just before shooting. All the food had to be bought again, in the middle of the night, on location in Paris.
In 1929 a westbound Orient Express train was stuck in snow for 5 days at Tcherkesskeuy, some 130km from Istanbul. This incident inspired the setting of the book and film.
The actor John Moffatt, who is listed in the cast as 'Chief Attendant' would later go on to provide the voice of Poirot himself in the BBC audio dramatization of 'Murder on the Orient Express' broadcast from 28 December 1993 to 1 January 1994.
Albert Finney's denouement summation at the film's climax runs eight pages.
Director Sidney Lumet thought the best way to acquire an all-star cast was to sign the biggest star first. In 1974, that was Sean Connery, whom Lumet had previously directed.
The poem that Rachel Roberts reads to the dozing Countess is "Kennst du das Land," by Johann Wolfgang von Goethe, later set to music by Beethoven. The verse goes like this: Kennst du das Land, wo die Zitronen blühn, Im dunklen Laub die Gold-Orangen glühn, Ein sanfter Wind vom blauen Himmel weht, Die Myrte still und hoch der Lorbeer steht, Kennst du es wohl? Dahin! Dahin Mocht ich mit dir, o mein Geliebter, ziehn.
There are two references to 'Alfred Hitchcock''s The Lady Vanishes (1938): Ratchett disappears in a tunnel, and (later) an initial is drawn on a fogged window.
There are two musical references to Shirley Temple movies. In the restaurant where Bianchi and Poirot dine, a trio plays "On The Good Ship Lollipop." And later Poirot sings two lines from "Animal Crackers in my Soup"
The film boasts 58 Oscar nominations and 14 wins (not including 2 Honorary wins) from its principal cast and crew. Martin Balsam (1), Ingrid Bergman (3; 7 nods), Sean Connery (1), John Gielgud (1; 2 nods), Wendy Hiller (1; 3 nods), Vanessa Redgrave (1; 6 nods), Paul Dehn (1; 2 nods), Geoffrey Unsworth (2; 4 nods), Anne V. Coates (1; 5 nods), Tony Walton (1; 5 nods) and Jack Stephens (1; 2 nods) are Oscar winners; Lauren Bacall and Sidney Lumet are Honorary Oscar winners. Albert Finney (5), Bacall (1), Anthony Perkins (1), Rachel Roberts (1), Richard Widmark (1), Lumet (5), Richard Rodney Bennett (3) and producers Richard B. Goodwin (1) and John Brabourne (2) are Oscar nominees.