Continuity mistake: When the butler tells Linnet Ridgeway that the architect isn't there yet, she turns towards him dramatically in the first shot, and in the following she again turns towards him. (00:04:30)
Continuity mistake: Mia Farrow begins running towards her friend Linnet holding a box of sweets in her left hand. The next shot shows her holding it with both hands, and then she switches to just the left. (00:04:50)
Continuity mistake: When Jackie tells Linnet that she has a favour to ask, she holds the box at different height and tilt during the conversation, and the position of her fingers on it changes as well. (00:05:40)
Visible crew/equipment: In the scene near the start of the movie when Lois Chiles is showing Mia Farrow her bathroom and Mia Farrow is saying "Yes, It's lovely," on the mirror on the right you can see a member of the crew crawling around on his hands and knees. This is visible on the DVD as well as at the cinema. (00:05:50)
Revealing mistake: Jackie is so ecstatic at the idea that her boyfriend is going to work at her friend's estate that she kisses him without watching the road. Since she is not paying attention, the car nearly hits the hedge at one side of the road, and she does a last minute swerve ending up cutting through a lawn before she can get back on the road again. During this maneuver which should be spontaneous and unplanned, you can see dirt skidmarks on the asphalt in front of the car from previous takes and a clear pathway through the lawn. (00:07:30)
Revealing mistake: 'Uncle' Andrew Pennington reads the article with Linnet's wedding. The article is obviously fake; the part about the wedding is written in a font different from the rest of the page, and the rest of the content resumes without any column break. (00:08:40)
Factual error: Mrs. Van Schuyler reads the news of the Linnet's wedding on a copy of the Washington Post bearing the date September 11 1930. However, the cars used in the movie (Linnet's Rolls-Royce 25/30 and Jackie's MG J2 Midget) are from several years later in the decade. (00:09:30)
Continuity mistake: In the introduction of her character, Bowers tells Mrs. Van Schuyler "What do I care" to her threat. She sits straight, with the cigarette hand slightly below chin level. In the wide angle she sits back, with the cigarette hand resulting at a higher position. (00:09:45)
Continuity mistake: When Linnet and Simon reach the pyramids, their horses change abruptly position as they dismount to tie them to the stone, and change distance again at the next overhead shot. (00:11:00)
Continuity mistake: On the top of the pyramid, Linnet whispers "Silly" to Simon's question about her happiness, and she holds him close. Her thumb is on display at the side of his bicep, but at the cut it's on the part of the arm that faces her. (00:12:20)
Continuity mistake: On the Neter Menkaura pyramid, Linnet shouts; "She's following us about, deliberately" in a close-up with all the hair in front of her shoulders, contrasting with the previous angle, where her hair was behind the shoulders. (00:12:55)
Continuity mistake: When Simon frees the horse's reins from under the stone, the saddle blanket all of a sudden folds between shots. (00:13:25)
Continuity mistake: Simon and Linnet regain their wits after the unexpected encounter with Jackie on top of the pyramid of all places. They make out, and Linnet's hair changes radically position depending on the camera angle throughout the whole snogging. (00:14:35)
Continuity mistake: When Ferguson says that he's "observing the decline of the capitalist system", he holds 'Das Kapital' at the top corner. His hand moved from the position in the previous shot, which was at the bottom of the same side, and changes again at the cut and switches back and forth as the angles alternate. (00:17:15)
Continuity mistake: When Poirot tells Jackie "Turn your back on the past", Mia Farrow is wiping her neck, but in the next shot her handkerchief is pressed against the cheek instead. (00:23:25)
Continuity mistake: Poirot watches Jackie leave the hotel seemingly falling for Simon's ruse. He's having breakfast; when he puts the croissant in his coffee, the hand holds the brioche with its flat side upwards. Ustinov in close-up is eating the brioche with the curved side up. (00:27:00)
Continuity mistake: During the conversation when Bette Davis' character is introduced to Lois Chiles', the background changes inconsistently between shots. (00:32:40)
Continuity mistake: In the first conversation between Linnet and Mrs. Van Schuyler, Bette Davis' hands are positioned differently depending on the camera angle - either the right hand or the left hand on top of the other. (00:33:00)
Continuity mistake: Bowers and Van Schuyler retire in the cabin leaving Linnet behind them. The deck is dusky, but in the reverse angle that follows, there she is, on the fully sunlit deck. (00:34:30)
Continuity mistake: Mrs. Salome Otterbourne sits next to Linnet. Linnet is holding an object between her hands; when Salome says that writers can get flowery in their speech, Linnet replies drily, but the hands changed also position. They were at the same level in the first shot, they are one on top of the other in the follow-up. (00:35:00)
