Continuity mistake: When the Protagonist, with Neil's help, is trying to stop the inverted car in which Kat is locked up, the door's window is lowered differently depending on the shots. (01:20:36)
Continuity mistake: When the Protagonist and Neil are driving away from the inverted vehicle, there is a shot where the Protagonist is shown looking forwards out of the front windshield, but when the camera changes angles, he is suddenly looking to the right to face the inverted vehicle. (01:19:23)
Continuity mistake: When the Protagonist is being dragged into the Freeport by two of Sator's bodyguards, an inverted Sator is in the background, dragging Kat by her arm on the opposite side of the gate. A closer shot of Sator dragging Kat is then shown, where he now has his arm across her abdomen. (01:22:10)
Continuity mistake: Just after the Protagonist has obtained the case containing the Plutonium-241 and is back in the car with Neil, he opens the case and his right hand is shown placed on top of it. It then cuts to a different angle and his right hand is suddenly touching the Plutonium-241. (01:18:09)
Continuity mistake: When the Protagonist walks into Sator's office, a doctor is shown checking his blood pressure and is then ordered to leave. In one shot, the doctor is shown walking past the Protagonist, but in the next shot, the doctor is shown walking past the Protagonist a second time. (01:00:40)
Continuity mistake: Whilst the Protagonist, Sator and Kat are riding in Sator's yacht, Sator asks the Protagonist "What do you know about opera", and the Protagonist is shown facing forwards. The Protagonist then answers Sator's question and he suddenly has his head turned 180° to face Sator. (00:57:23)
Continuity mistake: When the Protagonist and Neil are standing in the hallway after averting the halide gas, Neil says "There's someone in here with us", and is shown standing right next to a wall when he says this. In the next shot, he is suddenly standing next to a bend in the wall. (00:44:05)
Continuity mistake: When Kat is talking with her son outside the school, just as she says "We will. We'll go together", a schoolgirl and her mother are shown walking past Kat, on her left. It then cuts to a closer angle of Kat and the mother and daughter have suddenly disappeared. (00:33:40)
Continuity mistake: When Barbara asks the Protagonist which bullet is which, when Barbara "picks up" the backwards gun, the bullet is fallen over on the table, indicating it's been dropped. (00:14:31)
Continuity mistake: When the Protagonist and Neil first meet in the hotel, just after Neil puts his hand out to be shaken, the Protagonist begins to reach out his hand for the two to have a handshake. In one shot, the Protagonist is sitting back in his chair, but when the two shake hands in the next shot, he is suddenly leaning forwards, then in the next shot after that, he is suddenly sitting with his back against the chair. (00:18:26)
Continuity mistake: When Neil first sits down next to the Protagonist, he is looking forwards whilst he starts talking, but when the shot cuts, he is suddenly looking at the Protagonist. (00:18:18)
Continuity mistake: Just after the siege in the opera house has begun, the scene cuts back to the truck with the SWAT team inside. The driver is shown with his head turned to the right to face the man in the passenger seat while he says "Wake up the Americans." The camera then changes angles and the driver is suddenly looking forwards out of the front window. (00:01:25)
Continuity mistake: At the start of the scene where the Protagonist is having dinner with Kat in the restaurant, there is a shot from behind him where he says "Traced it back to Arepo", and he is shown clasping his hands. It then cuts to a shot from in front of him where his hands are now placed on the table. (00:28:20)
Continuity mistake: When the Protagonist has Sanjay held at gunpoint, he says to Priya that if Tenet is important to her then she can tell him, to which Priya replies not while he has a gun pointed at her husband's head. The Protagonist then pulls the gun away from Sanjay's head and begins to step back. It then cuts to a shot focusing on Priya, and the Protagonist, shown standing on the left corner of shot, is suddenly standing completely still and motionless. (00:22:20)
Continuity mistake: When the Protagonist is on the phone with the contact in Mumbai, just as he says "We live in a twilight world", two men are walking past him. One man is wearing pink robes and the other is wearing a black and red checkered shirt. A closer shot of the Protagonist is then shown, where the two men are shown walking past him a second time. (00:17:45)
Continuity mistake: Just after the Protagonist has had some of his teeth pulled out by the Russian driver, the driver begins turning the time on a clock back by one hour. He is shown holding the clock with his right hand, and is shown turning the time back with his left hand. But in the next shot, he is suddenly holding the clock in his left hand and his right hand is at his side. (00:08:10)
Continuity mistake: When the Protagonist is on the boat and is talking with the agent, just after the agent first mentions Tenet, he says "It'll open the right doors, but some of the wrong ones, too." Whilst he says this, the Protagonist is shown looking straight forwards out to sea, but when the camera changes angles, he is suddenly looking at the agent. (00:10:40)
Continuity mistake: When the Protagonist is being questioned on the train tracks by the Russians, the driver removes a cyanide capsule that the Protagonist had hidden in his uniform. In one angle, he is shown holding the capsule with two fingers and one thumb around the bottom half of it. When the shot cuts to a different angle, he suddenly has one finger positioned on top of the capsule. (00:07:23)
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)
Continuity mistake: When Andrei is about to beat Kat with a belt, he throws cushions at her. One lands right next to her head, but disappears a shot later. (01:03:45)
