The captain, who regains consciousness after being hit by Gilbert and holds the remaining passengers at gunpoint, suddenly disappears from the story.
When the manager comes into Gilbert's room in response to the complaint of noise, Gilbert is playing his clarinet. He removes it from his mouth, and yet another note is played.
Two or three shots after Miss Froy writes her name on the window the writing is not only different, but in a different place.
Just after the train starts out, we see it on a high bridge; behind the locomotive and tender are a van, four passenger cars, and another van. Just after the lady vanishes, an exterior view along the side of the train shows at least five passenger cars, and we were told that there have been no stops.
The way Iris leans on her pillow when Gilbert enters her room changes between shots.
In Europe, the hotel manager says it is "spring" when talking about the avalanches. However, the two English travelers are trying to get back to England for the Manchester cricket test, which was always played in July.
When the young lady is standing up and pulls the emergency cord to stop the train, she remains in a stable upright position. A sudden stop by a train should have caused her to lose her balance and be flung in the forward direction of the train.
In the noisy dancing scene above Lockwood's hotel room, the clarinet is shown with the mouthpiece turned with the reed upwards. Normally the mouthpiece is turned so that the reed is downwards, but in some European folk traditions the clarinet was played with the mouthpiece "upside-down".
Set in winter, yet when Miss Froy stands at the hotel window to admire the moon and stars, there is a tree branch with thick full living leaves above her head.
In the opening scene of the movie, the camera tracks downward in an aerial view over the side of a snow-covered mountain to show railroad tracks and the front of a train's locomotive buried by an avalanche, close to a train station in a small mountain village. As the camera passes over the train and four railroad officials standing to the left of it, one of the officials swivels to the left and then to the right, as if he were rotating on a pivot. As the camera moves closer to the ground, away from the train station and along a village street at ordinary eye level, it shows an automobile crossing the far end of a street; the string pulling the automobile along the street is plainly visible for an instant. Both this detail and the movement of the railroad official show that the entire opening scene was shot upon a scale-model miniature set.
When Miss Foy enters the dining car she immediately proclaims "I always face the engine when traveling on the train" and immediately sits with her back to the engine.
The newspaper which the cricket fans were reading was the New York Herald from March 17th, 1938, the day after the inaugural NIT final between Temple and Colorado. The cricket match which they were trying to get back to England to watch was played in July of that same year.
Around 10'37" when the maid reaches down under the bed to get her hat; Charters opens his mouth with a gasp. Then as he and Caldicott turn around, something drops into the bucket of water. However, during the aforementioned events, the sound is muted. The sound returns once the maid stands up with the hat.
The train scenes were filmed in England, where trains ride on the left track. In continental Europe (except most of France), where the story is supposed to take place, trains ride on the right track.
There is no explanation of why there is a grand piano in the office of a civil servant.
When the man from the Foreign Office tells Gilbert and Iris that they can be seen now; the man turns his back and they proceed to follow him toward the office door. Suddenly, Gilbert stops Iris and then tells her to wait a minute. However, the man anticipated the "wait a minute" line and stops to turn around before Gilbert says the line.
At one point "Mrs. Todhunter" says that her husband thinks she is on a cruise, so she is concealing her adultery; later she says that she told her husband, on leaving him, that he would never see her again.