Corrected entry: In the scene where Ethan Hunt types the email for Max, he retypes it again in German, using letters like "ä", "ö", and "ü". However, these letters do not exist in the English alphabet, which is why the laptop he's using doesn't have keys on it with those letters, (and neither does Czech by the way, for anyone who would assume that he might have gotten the laptop in Prague). To be able to type the email in German as rapidly as he did, he would have needed a German laptop, produced and sold in German
Corrected entry: When Ethan runs out of a restaurant after blowing the large water container with fishes with his chewing gum-bomb, you can see all the fishes fall to the floor as water rushes outside the restaurant. No even one fish moves. The explosion wouldn't have killed them because the tempered glass and the water have more density than air, so it would break the glass, but the blast would go the other way. They drop dead. (Fake ones for the activists, maybe.)
Corrected entry: Ethan doesn't wear glasses so why did he choose to wear some when he was hanging in the room trying to get the NOC list?
Corrected entry: In the secure room, why didn't they just knock the guy out and tie him up? Then they wouldn't have had to worry about alarms at all! Claire wouldn't have even had to go inside and they wouldn't have needed all that computer technology. Ethan was hanging right over top of him and easily could have handled it.
Corrected entry: During the Channel Tunnel helicopter chase sequence, the colour of the helicopter changes from red to black.
Corrected entry: Why does the CIA go to all the trouble of putting lasers across the air vent into the secure room, wouldn't it be cheaper and easier to make the air ducts too small for anyone to squeeze through?
Corrected entry: During the scene where Ethan is hanging in the bank, he can't talk or he'll set off the sound-sensor; he can't touch the ground because of the weight sensor; and he can't cause the room to get too hot because he'll set off the heat sensor. If there were a vent, the temperature would most likely change. Why isn't there a motion detector?
Corrected entry: Liverpool Street Station is shown as more or less deserted in the hours of daylight. The only way this could be achieved in real life is by phoning in a bomb threat.
Corrected entry: Why on earth would the NOC computer be left online while the operator is out of the room? A simple logon card on a chain around his neck could be used, like most government departments do. Why would such a sensitive computer have a CD burner attached?
Corrected entry: When Ethan is in the computer room, why doesn't the alarm trigger when he types on the keyboard?
Corrected entry: In the scene where Ethan is in the NOC list room, when the camera changes to Krieger you can see a rat approaching. Krieger has noticed this rat. After you see Ethan come all the way back up and nearly into the hole the camera changes back to Krieger and there is a dead rat behind him. How did Krieger manage to kill that rat if both his hands were doing something?
Corrected entry: The only place in London with that much grass around Tower Bridge is the Tower of London itself. I don't think whoever runs it would be happy to have a chopper within its walls.
Corrected entry: When Krieger drops the knife into the room William Donloe is just about to come in. When he does he looks up and the vent is back to normal screws and all. They would never have enough time to take the laser stoppers off, put the vent on, and screw it back in. Also if they did do it that quick how did they not make one sound?
Corrected entry: When Ethan Hunt is in the computer room dangling just above the floor (right before his sweat starts dripping down the glasses) and he is moving around trying to keep his balance, the edge of his shirt touches the pressure sensitive floor. (Granted, this was only for a second but the alarm should have gone off.)
Corrected entry: At the beginning when Jim Phelps is being briefed about the mission, the recording tells him that his "usual" team will be used, and then goes on to tell him who they all are and what their skills are. If they are his usual team, surely he would know this already? I know it tells the audience who the characters are but it makes no sense to tell Phelps that Jack can hack into any security system when he was most likely recruited for that very reason.
Corrected entry: In the scene where they go to the mainframe to get the NOC list, there is, of course, an extremely secure computer. However, with all these security precautions, somehow, it allows logins when the security system knows that no-one can be in the room.
Corrected entry: Why is there a sign inside the secure room saying whether the security measures are on or off? The only people able to read it would have to be in the room, and anyone supposed to be there would know they were off, and there would be no reason to put a sign up for anyone not supposed to be there.