In 1958, after filming "Vertigo", Hitchcock once said that he wanted to make some changes and make a humorous, relaxed, non-symbolist film. Despite its pop-culture homage, North by Northwest is not shallow in its understanding of Cold War-era moral relativism and conspiracy. In this film, Hitchcock did not make the film revolve around only one suspense like his earlier films. Instead, he used a layer-by-layer approach to replace the suspense, and added a lot of humorous dialogues to the film to attract the audience. The introduction of movies is quite refreshing.

The title of the movie "North by Northwest" has always puzzled audiences. According to research by senior movie fans, the reason why it is called this is because Roger's escape route is towards the northwest. However, Hitchcock once said in an interview in 1963 that the name came from "Hamlet" and was intended to be a metaphor for the elusive reality. There was also a pun on Northwest Airlines mentioned in the movie. Which statement is true? It's really difficult to get a definite answer when meeting an old naughty boy like Hitchcock, but this is not the charm of suspense movies. ·James Stewart wanted to star in this movie so much that he begged Hitchcock to let him play the role of Roger, but Hitchcock said that 1958's "Vertigo" was not a commercial success because James looked too old. MGM wanted to use Gregory Peck, but Hitchcock insisted on Cary Grant. However, Cary Grant was four years older than James Stewart.

·Hitchcock was not allowed into the United Nations Headquarters to shoot the film.

·The final chase at the Mount Rushmore Monument did not receive official filming permission. Hitchcock had to replicate the Mount Rushmore Monument in the studio. Everyone was careful during the filming, lest it be damaged. The portrait on the replica.

·The day before filming the scene where Roger hides in a train bunk, Cary Grant told Hitchcock that the "top bunk" was too big for the movie. Hitchcock completely believed Grant's words and customized a top bunk, but forgot to let Grant try it first, which resulted in the scene in the movie where Roger is depressed after coming out of his hiding place.

·Jessie Royce Landers plays Roger's mother, who is actually only seven years older than Cary Grant.

·Roger appears on the left side of the screen for almost the entire movie.

·Before Roger entered the Oak Bar, the song played in the hotel lobby was "The Most Extraordinary Day".

·Eva's lines "I never have sex when hungry" were dubbed later. In fact, what she said was "I never have sex when hungry", "discuss love" and " "make love" is still very different.

·At the Mount Rushmore Memorial location, Eva discovered that Cary Grant charged his fans for autographs, 15 cents each.

·Before filming this film, Hitchcock joked that he would name the film "The Man on Lincoln's Nose".

·One day, Martin Landau found Hitchcock talking to Cary Grant and James Mason. He asked Hitchcock why. The director replied that if he didn't talk to them, , indicating that they performed well, otherwise, there is a problem.

·Hitchcock was very dissatisfied with the clothes the company designed for Eva, so he had to take her to the mall to pick out clothes.

·Many of the cars used in the movie are private cars produced in 1958.

·When the film was finally screened, only eight yards at most were cut from the film. Eight yards is only about five seconds. ·The position of the wine glass changed during dinner on the train.

After Roger escaped from two thugs, he got into a taxi. Then the two thugs also got into a taxi and tried to catch up. However, when Roger looked back at the hotel, , the taxi disappeared.

·The trees began to shake as the ambulance passed by.

·Before Eve shoots Roger, a little boy in the background covers his ears.

When Roger and her secretary's taxi pulled up in front of the Plaza Hotel, a 1958 Ford parked behind them, but when they stepped out, the car behind them turned into a 1957 Dodge.

·When the plane and truck collide, the wires are clearly visible on the right side of the screen.

When Roger ran out of the cornfield, his shoulders were covered with dust, but after a while, all the dust was gone.

·At the Mount Rushmore Memorial, Eve ripped the pocket of Roger's pants when she slipped. In subsequent shots, the pants were still intact.

·When Roger left his secretary, the back of the taxi he took was bright orange. When he got out, the color changed.