Audio problem: When Kat is speaking with the Protagonist shortly before he inverts himself, there is a shot focusing on the Protagonist where Kat is shown in the corner of shot saying "I didn't get to say goodbye", but her lips don't move. (01:54:30)
Continuity mistake: When the Protagonist and Kat are speaking shortly before the journey to Stalsk-12, in the shot where Kat leans in to kiss him on the cheek, the oxygen mask that the Protagonist is shown wearing is positioned hanging directly in front of his mouth. The shot cuts to focus on Kat, but when it cuts back to the Protagonist, the oxygen mask is suddenly hanging in front of his left cheek. (01:55:34)
Continuity mistake: When Ives is briefing the red team about the mission before they go to Stalsk-12, in the first shot inside the tent, there is a brunette woman in the front row to the right of shot, who is shown is pulling her hood down and then begins smoothing her hair. The shot then cuts to an angle in front of the soldiers, but when the shot cuts again, that same woman is shown pulling her hood down and smoothing her hair a second time. (01:56:42)
Continuity mistake: When the soldier explains how the red and blue teams are going to attack, he paints red and blue lines on the screen. Check the arrow on the blue line: it changes style between shots. (01:57:57)
Revealing mistake: In the temporal pincer soldier scene, the red team is shown moving forward in time, jogging slowly, with a reverse explosion in the background. However, there is one red soldier in the foreground running in reverse, which is inconsistent. (02:02:35)
Continuity mistake: In Stalsk-12, Wheeler and a blue team soldier take cover inside a house in which chunks of rubble have been blown out of the wall. When the pieces of rubble begin to reassemble back into the wall, Wheeler runs out and the soldier attempts to run out but gets sealed back in. Right after Wheeler runs out of the hole, and the soldier begins screaming, he is shown standing upright. But in the next shot, right before the rubble chunks go back into the wall, the soldier can be seen now kneeling over the hole in the wall. (02:05:45)
Other mistake: Just after Kat kills Sator, the Protagonist looks up at the timer on the bomb, sees there is ten seconds left on it, and continues counting down. Neil then drops a rope inside the cave. After he does this, it cuts to Neil above ground in the vehicle, waiting for the Protagonist and Ives to tie themselves to the rope, watching the helicopters flying away. He then looks at the timer on his watch, which is perfectly synced up with the timer on the bomb, and seven seconds is shown on it. The moment where Neil is shown in the vehicle and watched the helicopters flying away lasted much longer than three seconds. No way could only three seconds have passed on the timer. (02:16:50)
Continuity mistake: When Priya is preparing to have Kat assassinated, the Protagonist gets inside her car and shoots the gunman. Priya then turns the mirror around to see the Protagonist's reflection. In the shot after this, she is shown lowering her hand away from the mirror. It then cuts back to the mirror and her hand is suddenly back on it again. (02:23:03)
Continuity mistake: Just after the Protagonist has shot Priya, Kat is shown closing her phone after using it. Behind her, a man and woman are shown walking past on the sidewalk, and then after that, two women are shown walking past. In the next shot, these people suddenly disappear from the sidewalk completely. (02:23:56)
Other mistake: In the end credits, the cast is listed in order of appearance, but the listing of some cast members is inconsistent with how they first appear in the movie. Immediately following the credit for Crosby (Michael Caine), the next few characters listed are Shipley's Representative - Kat - Max - Volkov - Gaunt Russian - Nanny. This does not match up with the movie. After the scene with Crosby, the Protagonist is shown watching Kat outside a school visiting Max, who is with the Nanny. The next scene he goes to Shipley's, where he is greeted by the representative, and in the scene after that, he goes to a restaurant where he meets Volkov and fights the Russian bodyguards. The correct order should be Kat - Max - Nanny - Shipley's Representative - Volkov - Gaunt Russian. (02:26:07)
Visible crew/equipment: When the Protagonist and Neil are in front of the turnstile at the freeport, and they notice the bullet holes on the glass, a cameraman can be slightly seen reflected on it behind the Protagonist just a moment before he tells Neil to not touch the holes.
Other mistake: In Oslo, the recently reverted Neil pushes Kat outside after the Protagonist is already outside and stolen a van. They went through the turnstile after the Protagonist and that means staying inverted longer. That means they should have come out of the turnstile before the protagonist and most likely beat him outside.
Continuity mistake: When the Protagonist gives the case to Sator in the car chase sequence, and he and his men exit from the Audi and get on the other car, Audi's window is first slightly lowered and then up in two different shots.
Continuity mistake: When the Protagonist fights against the inverted man inside the freeport just after the plane crash, at a certain point the inverted man kicks the gun away, making it fall. The gun in the background changes position and distance in two different shots.