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)
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)
Continuity mistake: When Ferguson helps Simon Doyle on the couch, his tie slides off Simon's non-injured leg once, then in the next shot it is on it again and re-slips. (01:00:55)
Continuity mistake: At the beginning of the scene when Jackie gets drunk in record time, David Niven's shadow on the curtain changes sharply when the angle switches the first time; in the closer view he casts a deep shadow right behind his head, while in the wide angle of the room there's barely any shadow. In the same transition, Linnet is touching the cards with both hands first, simply holding her cigarette in the second shot. (00:57:55)
Continuity mistake: When the doctor feels the need to make a precise assessment of the stone's age, the maid is suddenly close to the big rock between shots. (00:49:00)
Continuity mistake: Linnet is enraged because apparently Salome Otterbourne featured her in her fiction book and equated her to "a nymphomaniacal baboon." Nonsense aside, she gets up holding the book. Angela Lansbury is looking at her, left hand upturned. Cut, and she is staring at her with both hands in her lap, downturned. (00:35:35)
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)
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: 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: 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 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: 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: 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 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)
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)