Continuity mistake: During the bridge scene, soldiers approach the armoured vehicle to spray it with orange gel. As they approach, the vehicle has a triangular reflector on the rear side. In the shot five seconds later showing the orange gel being sprayed, the rear reflector is circular. (01:03:40)
Continuity mistake: Towards the end of the film, after Tom has been electrocuted to destroy the bomb implanted into his skull, we see the female lead trying to restart his heart, each time they show his eyes, they are closed or open in different shots, and if they are closed, you can see his eyeball moving underneath the eyelid.
Continuity mistake: In the scene in Berlin, the female member of the IMF team starts with no special glasses/goggles, then has them up on her head, then, just before the shooting begins, she puts them over her eyes, but later, while the shooting is still going on, they are back up on top of her head. Then they completely disappear. (00:17:50)
Continuity mistake: Near the end of the movie, when Tom Cruise is running through the narrow streets in China, while on the phone with the guy from IMF, he is nearly struck by a truck coming very quickly from an adjacent street. In the next shot, they show the road from which the truck had just come. The thing is, it's filled with people, none looking like a large truck just went barreling by. The truck was going at too high a rate of speed to have come from the heavily populated street.
Continuity mistake: When Ethan - after getting the rabbit's foot - calls Musgrave, his location is shown on a map. He is in the northern part of Shanghai, quite some distance from Pudong, the area south of the river, where the high rise buildings are. However in the next clip, he drives down the on-ramp to The Bund, which is the street right next to the river, opposite Pudong. So he's been driving in circles - and extremely fast.
Continuity mistake: When Davian and Hunt are fighting in front of Julia, Davian slugs Hunt on the floor and walks for the gun. Hunt is twice seen lying on a floor with no glass, the second shot a close-up showing his face and clean arm. In the next shot, as Hunt rallies and goes to rise from the same body position, he's lying in piles of glass and has glass stuck to his arm.
Continuity mistake: In the bridge scene Ethan runs to the IMF truck to retrieve the G36 gun case. He shoves it out across the ground and flees to escape the approaching missile. When the missile strikes, the explosion knocks Ethan against a car, and the gun case is blown further across the ground and appears to come to rest right next to him; yet in the next shot he has to run several steps to get to it. (01:07:00)
Continuity mistake: When Ethan is offered the task and refuses, he is told that just in case he has a change of heart, that the team will be "wheels up at sunrise". When he arrives the next day, the sun is much more in the position of late morning.