Continuity mistake: When Agent Cowan is asking the FBI director what happened, she says that they are gone and tells the man beside to come with her. She and the man then start walking, with the FBI director walking a couple of feet ahead of the man. In the next shot, the man is still behind her, but suddenly slightly closer. (01:53:50)
Continuity mistake: When Daniel is trying to take the OCTA CCTV guard's ID pass, he takes a picture of him with a Polaroid camera so that he can stick it onto a tag to prove that he is from a mental hospital. When the picture prints out from the camera, all that is shown is shown is the image of the guard against a white background, instead of the wall seen behind him. Also, when Daniel takes the picture, the guard has his head turned to the right to face Daniel, but when the picture prints, the guard has his head positioned completely forwards. (00:17:40)
Continuity mistake: When Walter is explaining his relationship with Owen to the Horsemen, Merritt's position changes whenever the shot is on him. He is either sitting on the couch with his arm on the arm rest and leaning forward, sitting with his arm on the arm rest and has his back against the couch or sitting with his back against the couch with his hand in his lap. (00:37:45)
Continuity mistake: Daniel is about to give the chip to Walter and Dylan rushes in to stop him. When Daniel first takes out the chip, he has it in his right hand, but when Dylan pushes him up against the wall, the chip is suddenly in his left hand. (01:11:15)
Continuity mistake: When Dylan is on the boat with Walter and Tressler, there is a bloody cut on his bottom lip, but when he is rescued by the Horsemen minutes later, the bloody cut has suddenly vanished. The cut reappears when Dylan and the Horsemen are talking in the next scene. (01:15:05 - 01:22:15)
Continuity mistake: When Jack is performing in London, there is a woman directly in front of him, recording him on her phone. In one shot, she has her left hand across the left side of the phone and is holding it, but in the next shot, she is only holding the left side with only two fingers. (01:29:20)
Audio problem: When younger Dylan is talking with his father before he performs the stunt, Dylan tells Shrike he doesn't want him to go and Shrike says to him "Dylan, come on. We talked about this." As Shrike says "Dylan, come on", the shot is behind him, but his jaw doesn't move with the speech. (00:01:15)
Continuity mistake: When the Horsemen are escaping the OCTA party, Merritt starts accusing Daniel of being the lead Horseman and removes the microphone headset he is wearing. The shot then cuts to an angle behind Merritt, and the microphone headset is suddenly back on his head. (00:25:40)
Continuity mistake: After arriving at the Macau casino, Chase starts teasing Merritt and Merritt then gives Chase the finger by rubbing his eyes with his middle finger. Merritt then begins to lower his arms, but in the next shot, his arms are suddenly by his side. (00:33:10)
Continuity mistake: When the Horsemen first see Walter Mabry, he is shown flicking a card between hands. Just before the camera cuts to a closer shot of him, he is seen with his head facing the window, but when the camera cuts to the closer shot, he is suddenly looking at the card. (00:34:15)
Continuity mistake: When Merritt and Chase are talking at the bar, they are sitting side by side facing the bar, but when the shot changes, they are suddenly turned 90° to face each other. (00:48:30)
Continuity mistake: When Dylan meets up with Daniel in Macau, Daniel tells him he cannot be seen with him. Daniel's hands are by his side, but in the next shot, he is suddenly has one hand on his ear. (01:08:55)
Continuity mistake: The analogue clock on the wall in Thaddeus' prison cell goes back in time by 5 minutes from 7:57 to 7:52. (00:42:10)
Continuity mistake: When Atlas walks in to the Octa phone launch disguised as a waiter he has a silver tray. Someone rearranges something on it as he walks down the corridor and it is plainly a silver tray. He walks through after the rearrangement and the next shot there is a briefcase visible under the tray. The tray is supposed to be a tray that becomes a briefcase but is too thin to do that. When first seen there is no space for the briefcase part to be closed up against the tray. (00:16:55)
Other mistake: Merrit claims he has never ridden a motorcycle and talks about how unsafe it is, but is seen riding one in the first film. (01:39:30)
Continuity mistake: In the first movie, when Dylan and Alma first meet up with Thaddeus Bradley for lunch, he mentions that Lionel Shrike was a magician in the 1970s and one year later, attempted the safe in the river trick that killed him, but in the opening scene of this movie, it is shown that the safe in the river trick that killed Lionel Shrike took place in 1984. (00:00:35)
Continuity mistake: When Dylan is showing the FBI director and Cowan the photo of who may be Merritt McKinney, he is standing next to the director turned to the right, but in the next shot, the two are suddenly directly facing each other. (00:08:15)
Continuity mistake: When Merritt fails to throw the card, Jack says "it's good to be positive despite having made zero progress in a year" whilst looking at Merritt. In the next shot, Jack's head is suddenly turned about 90°. (00:12:50)
Continuity mistake: The banana that Jack takes from the woman at the metal detector when he is posing as a security guard at the OCTA launch is different to the one he plants in the CCTV guard's pocket a few minutes later. (00:16:25 - 00:18:30)
Continuity mistake: When Walter begins hijacking the Horsemen at the OCTA launch, Dylan says "let's go to the back", and the FBI director tells him to stay here. There is a bald FBI agent standing in front of him to the right, but in the next shot, the FBI agent is suddenly behind him. (00:24:15)





Answer: Walter thought the chip was real because he placed it under a scanner and the scanner confirmed that the chip was real. However, given the fact that later on it was revealed that the whole plane sequence was a set up, it is probable that the device used to scan the chip was actually a fake that was used to make Walter believe the chip was real, most likely throw him off guard.
Casual Person