Audio problem: When Thaddeus is explaining to Dylan and the FBI agents that the area they are in was Lionel Shrike's rehearsal space, there is a shot focusing on Dylan where Thaddeus says, "It's where I did my first show," but his mouth doesn't move. Also, a few seconds later, Thaddeus says, "and while you're doing it, Agent Rhodes," and his mouth doesn't move during that line either. (01:32:52)
Continuity mistake: When Thaddeus asks Dylan if he wouldn't mind reenacting his look of absolute befuddlement, there is a shot of Dylan being filmed by the camera crew shown from the POV of the camera. In the background, Cowan and Thaddeus's assistant Hermia can be seen standing next to each other. But in the next shot, when Dylan says "Open the safe," Cowan and Hermia are further apart. (01:33:08)
Continuity mistake: When the agents are trying to open the Elkhorn safe, an agent places a device next to the dial before pulling the dial out. The device that the agent is holding is positioned next to the dial, but when the shot cuts, it is pushed against the safe. (01:33:15)
Continuity mistake: After arriving at 5 Pointz, someone tries to find the combination for the safe and it is revealed to have had a green handkerchief attached to the rear end. Dylan then pulls on the handkerchief and keeps pulling on it to reveal more coloured handkerchiefs until it stops and a timer is heard ticking. When the clicking sound is heard, Dylan is shown holding onto the knot between a purple handkerchief and a blue handkerchief. The shot then cuts to Agent Cowan saying "What is this?", but when the shot cuts back to Dylan, he is suddenly holding the knot between a blue handkerchief and a yellow handkerchief. Then in the next shot, his entire hand is held onto the blue handkerchief. (01:33:25)
Continuity mistake: In the 5 Pointz, Queens scene where three of the four horsemen project themselves on the walls of the building, you see a cut to them standing in front of their three cameras. The cameras are pointed closely at their faces and yet you see a complete body shot of each one on the walls. (01:34:35)
Audio problem: When Alma meets up with Dylan at the 5 Pointz show, she says to him, "They're going in the wrong direction and you know it." Midway through the line, the shot cuts to focus on Dylan, but her mouth doesn't move while saying the remainder of the line. (01:35:42)
Continuity mistake: As Daniel, Merritt and Henley are in the elevator, the first shot of the elevator (exterior shot) shows Merritt standing a couple of inches away from the wall. A couple of shots later, Merritt is suddenly standing in the corner of the elevator. (01:36:30)
Continuity mistake: When the agents tackle the Horsemen dummies, Cowan jumps onto the platform after the agents fall to the ground. At this moment, he is facing them directly forwards. When the shot cuts, his body is at a rotated angle, facing away from the agents. (01:37:47)
Continuity mistake: When Cowan picks up the dummy after realising it isn't actually the Horsemen, he grabs ahold of the dummy by grabbing the right arm with both hands. Then it cuts to a closer shot of the dummy where his right hand is holding onto the dummy's abdomen. (01:37:50)
Audio problem: When Cowan realises the Horsemen are actually dummies, in a shot focusing on the dummy of Daniel, Cowan can be heard saying, "What the hell?", but his mouth, which can be seen briefly in the left corner of the frame while saying the line, is not shown moving. (01:37:51)
Continuity mistake: When the Horsemen are greeting the crowd at the 5 Pointz show, in a shot from behind the three while they are waving, Merritt is waving with his right hand before lowering it. When the shot cuts to an angle in front of them, he is shown lowering his left hand. (01:38:15)
Continuity mistake: At Pont des Arts in Paris when Dylan reveals his true self to Alma, the right page shown in the newspaper changes layout and stories. An earlier shot does not show a story about 12-year old Dylan while it's there in the second shot. (01:43:40 - 01:44:00)
Audio problem: When Dylan is explaining to Thaddeus the connection that Tressler Insurance and Credit Republican of Paris have to Lionel Shrike, he says "What do you make of that?" When Dylan says "of that", his mouth does not move in the over the shoulder shot. (01:45:50)
Continuity mistake: In the climax, when the 4 horsemen meet the Eye, the order in which they come is (from the left), Death, Hermit, Priestess, Lover. This is the same, as they enter the 'house' as the Eye says "The real magic is taking 4 strong..." But as he continues the line with "solo acts" the camera angle changes, showing Death at the other end, next to Lover, with no time for Death to do so. Also, after Eye says "Welcome to the Eye", Death jumps the gate into the play area, followed by Hermit, as Priestess and Lover goes through the gate. In the next frame, as they all watch Eye, Hermit and Lover are misplaced. This is okay until the Priestess holds her left hand with the right hand of Lover. However, right in the next shot, as Death climbs the 'wheel', Lover is to the right of Priestess, leaving Hermit to Priestess' left hand side, the position same when they entered into the play area. (01:49:45 - 01:50:50)
Continuity mistake: When Alma walks over to the bench on the bridge, there is a woman sitting on it and a guy standing next to the bench. When she sits down, the woman sitting and the guy standing next to it have instantly vanished. (01:51:20)
Continuity mistake: When Alma realises there is a separate newspaper inside the newspaper she is reading, there is a shot focusing on the newspaper that shows an article focusing on the death of Lionel Shrike. In the next shot, when Dylan reveals himself on the bench, the top left corner of the newspaper is suddenly folded over, presumably being blown by the wind. (01:51:40)
Continuity mistake: When Dylan turns to Alma to tell her about the safe manufacturer, we can see nothing is on Dylan's half of the bench. Later, a padlock appears on Dylan's half of the bench from nowhere. (01:52:05 - 01:53:30)
Audio problem: When Dylan and Alma are talking on the bridge, just after Alma says he knows how she feels about resolution, there is an over the shoulder shot from behind Alma where she speaks, but her mouth doesn't move. (01:53:15)
Factual error: In the final scene in Paris at the bridge with the padlocks, most of the keys tossed in the river are distinctive Kwikset brand keys. Kwikset only makes one fairly specialised type of padlock - no way all the keys are for that one type. (01:54:10)
Audio problem: In the mid-credits scene featured in the Extended Edition, the Horsemen get out of a van and start looking around. When Merritt gets out of the van, he does some stretches and says, "Okay, feeling it," but his mouth doesn't move. (01:56:09)
Answer: He confessed under the pretense that he didn't want an expensive trial but really because he was in charge of the Eye all along.