Continuity mistake: Chatting poolside on the lounger with Lionel and Claire, Birdie Jay says "No masks, I can breathe again." Kathryn Hahn was adjusting her suit with her hands on her sides, and suddenly they are on top of the laptop. She then closes the bathing robe, which is open again when Hudson says "Look at this pool." And when Claire started adjusting the swimsuit, Kate Hudson's hand suddenly wasn't on the hat too. (00:00:28)
Continuity mistake: In their bathroom consultation, Blanc compliments Helen about the 'interesting stuff about Whiskey'; he is leaning on the sink, and then suddenly he's gesticulating with that same hand. (00:01:29)
Continuity mistake: Lionel discusses with his fellow tech people the various crazy ideas the boss faxes in the middle of the night. There are several fax sheets rolled on the table throughout the scene. When he mentions the "Crypto Kids app", some sheets have been straightened out and lie on top of the rolled ones, but when the delivery person calls, there's nothing on top of the paper roll. (00:02:15)
Continuity mistake: The very first shot with Kate Hudson ends with her shouting for her assistant Peg. Look at the position of her fingers on the glass, very close to the rim. She is still shouting in the reverse angle but her grip on the glass changed. (00:03:05)
Continuity mistake: When Birdie's assistant Peg brings in the box, her hands are at the bottom of it and immediately on it in the next shot. (00:03:15)
Continuity mistake: When Peg calls Birdie out on the use of the word "jewy", she leans against the puzzle, holding the phone too. Her friend complains about the "wokeness" of everything, and Peg is gone entirely. (00:03:45)
Continuity mistake: An odd creepy guy ("Vampire in a tuxedo" according to the credits) gives Birdie an approving nod when she protests against the "woke" people that don't let her racial slur slide. She says "Love you, yes!" pointing at him, with the elbow of the other arm fully lying on the lap of the girl on the couch. Next shot and her pose changed entirely, no physical contact with other guests. (00:03:50)
Continuity mistake: When Claire calls Lionel at 14:07 asking him about the puzzle box, the phone in close-up is in a spot far away from any edge, while in the wider angle it's practically on the edge. (00:04:00)
Factual error: Birdie tries to use the tune recognizing app Shazam speaking to the wrong device. When she does that, the TV in the background plays footage from CNN, with the coronavirus epidemic, featuring Dr. Fauci. However, in that particular part of the scene they also show a map of the US that displays the states with no mask mandate. The chart can't be a May 13, 2020 one (supposed date of the scene), since it shows the situation at the end of the year. Several states in white like Washington, Nevada, Oregon adopted it only in the summer. (00:08:20)
Audio problem: When Lionel tells the others to lift the button at the center of the compass, you can notice that the music box is still playing, but the drum of the machine is still. (00:08:30)
Continuity mistake: When the Disruptors flick the final switch, Lionel's finger in the split screen shot comes from the right side of the frame, where the "7" is. In the shot of his desk though he is positioned on the opposite side of the box. (00:09:10)
Continuity mistake: The friends crack the final puzzle of the box and it open. Look at Lionel's desk when that happens; the shadows and the distance between the box itself and the crazy fax papers ("Nootrodic Nasal Spray"?) change between shots. (00:09:15)
Continuity mistake: In her introduction, Janelle Monáe is tapping nervously the card on her lap, holding it in a different way between close-up and wider angle. (00:10:30)
Other mistake: When the four 'Disruptors' that stayed buddies solve all the puzzles, they retrieve the invitation from an intricate miniature Glass Onion at the center of the box. When we see the mysterious outcast break the box open, she gets the card from a compartment on the side. While we are not privy to the inner workings of the mechanism, that's obviously not where it was supposed to be. (00:11:00)
Continuity mistake: Benoit Blanc tells his partner to get the door and unconvincingly says he is not in the bath, his left-hand changes blatantly position between shots. Throughout the whole scene in fact you can see Daniel Craig's hand by the second laptop in the side views but not on the close-up of the remote call. (00:12:25)
Other mistake: Claire Debella reacts to the biorhythm bracelet buzzing at her wrist. You can see that her wristwatch is set at 7 when it's supposed to be early afternoon at most. We can theorize that maybe she did not adjust the time to Greece and her wristwatch is still on Connecticut time, making it 2 pm in Greece, but it still wouldn't be right, since Daniel Craig was checking the time at the beginning of the dock scene and it was 10 am, and the ship sailed for 2 hours. (00:13:20 - 00:23:40)
Continuity mistake: During the scene on the pier that sets the movie in Greece, in most close-ups on Benoit Blanc you can see lines tied to both the bitt and the metal ring behind him, while the other angles show no cable or ropes secured and nothing on that side of the pier. (00:13:25)
Deliberate mistake: One of the first shots in Greece shows Benoit Blanc and Lionel standing on the pier. As director Rian Johnson himself says in an interview for the Vanity Fair Youtube channel, "Matches nothing else in the scene lighting-wise, but it's gorgeous soooo...who cares." (00:13:30)
Continuity mistake: On the pier, Kate Hudson calls Blanc "Stranger danger." The Greek porter Nikos makes a comment about it, hands on a suitcase, and Lionel is carrying a bag next to him. Brief reaction shot to a masked Daniel Craig that denies that, and not only Nikos' hands switched position and are on a different suitcase (which could have happened even if it's not what the posture implies), but Lionel is also bringing again the same bag. (00:14:25)
Continuity mistake: Hearing his name, Claire asks Benoit Blanc if he's THAT famous detective, the one who solved "the thing and the thing." In the shot where Blanc admits to indeed having solved the thing and the thing, you can see that she pulls up the facemask, but her hand has yet to come up and touch it in the next shot. (00:14:50)
