Continuity mistake: When Poirot and race play checkers while Pennington tries to swindle Linnet, a single piece lies at the side of the board in the wide angle, but in the closer views you can count 3. (00:36:05)
Continuity mistake: Pennington sits at Linnet's table and begins putting down contracts to sign. David Niven in the background looks at him, closed fist below the nose, but in the next shot he's staring at him stroking his temple and moustache, and at the following cut he changed position again. (00:36:20)
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: 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: 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 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)
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)
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)
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)
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 Bette Davis' character bids farewell saying that the place resembles a mortuary, Maggie Smith next to her holds her bag to her chest, but in the next shot she is also holding her suitcase with the same hand. (02:16:40)
Continuity mistake: The streak of blood on Simon's neck changes from the first time we see it to the time when the second gunshot is fired. (02:15:25)
Continuity mistake: Salome Otterbourne says she knows who killed Louise Bourget with her own eyes. She waves dramatically her left hand as she says that, and lowers it. Next shot and her hand am raised again, and it's not even the left. (01:49:30)
Continuity mistake: When the doctor arrives at the second murder scene and shouts "Killings, killings!", David Niven by the door is in pose with his arms crossed, and at the cut he has one hand on his knee and the other on the opposite hip. (01:46:40)
Continuity mistake: The pool of blood by the maid's sleeve extends at a different length in the different shots when they find her body. (01:45:10)
Continuity mistake: Race ends up putting the stained handkerchief to (his) left of the gun, but in the close-up of the table the cloth is on the derringer's right. (01:30:30)
Continuity mistake: When Race unfurls the packaging the crew dragged up from the riverbed, the part to his left (right of the frame) immediately comes undone and lines on the table, but in the close-up it opens differently. (01:30:00)
Revealing mistake: The Manager Of The Karnak Mr. Choudhury excitedly shouts "goody goody gumdrops" when the crew fishes out from the river the incriminating package. He then runs across the deck to bring it to the investigators. As he does that though, you can see on the floorboards already a wet trail from a previous take. (01:29:45)
Continuity mistake: During Louise's interview, look behind her as she mentions that naturally, if she "were not able to sleep..." The corner of the room (with the armchair where Poirot sits when he steals Simon's lunch) is entirely in the shade, but it's brightly lit in the rest of the scene. (01:22:40)
Continuity mistake: When the doctor starts cleaning Simon's wound, there's barely any blood on the side, but in the next shot, from the side, there's still a lot of it. (01:04:30)
