Deliberate "mistake": When Matt Damon and Marie begin to kiss in the hotel room, his wristwatch is on his right wrist; when the camera angle changes and they are still kissing, his wristwatch has mysteriously changed to his left wrist. Mirrors aren't involved - while there's a mirror in the bathroom, we see too much of the room in all of the shots for it just to be a reflection.

Plot hole: In Paris, why does the assassin go to the ridiculous amount of trouble of swinging into the room on a rope with a machine gun when he came in from the lobby (as proved by the dead woman downstairs)? Alternatively, if his intention was always to surprise Bourne by coming in through the window, why venture downstairs at all?

Continuity: This is the scene where Jason is on the fire escape platform in the embassy in Zurich. Before he goes down below the platform we see that the platform is cleared of all the snow. Then moments later, when security guard opens the door and Jason is under the platform, the top of the platform is fully covered with snow again.

Continuity: When Bourne gets the box from his numbered bank account, the bank clerk carries it by holding its handle. Then he puts it on the table tipping it over to the side, so Bourne can open it. Thus the ingredients (especially the heavy weapon) should all be laying on the right side, what used to be the bottom of the box. But when Bourne opens it, everything is nicely arranged.

Continuity: When Wombosi is assassinated by the other agent he is shown walking down the stairs with glasses on and a turtleneck sweater. He also has another man following him. Then the next shot shows Wombosi (or a stuntman) standing in front of the window with a leather coat on and no glasses. He is obviously not walking anymore and the man behind him is nowhere to be seen.

Factual error: Throughout the movie, there are countless references to the incident early in the movie at the U.S. Embassy in Zurich. Neither the U.S. nor any other country maintains an embassy in Zurich. The capital of Switzerland is Bern. Since most of the characters in the movie work for the U.S. government, they would surely know the difference between an embassy and a consulate.

Continuity: When Bourne approaches Marie about a ride, they talk across the top of her Mini. First, there is lots of snow on the car's roof. Then, there isn't.

Continuity: When Bourne blows up the tank at the farmhouse, the wide shots show a solid wall of black smoke. In the closer shots there's nowhere near as much. The smoke in the first shot must be coming from the explosion, and in the closer shot we're looking right at the destroyed tank, so it can't be due to different angles.

Visible crew/equipment: When Bourne is escaping from the Embassy and standing on the fire escape ledge, the safety cable for the later climbing scenes is clearly visible on the ledge around the corner to the right.

Continuity: In the scene where all the Treadstone agents are being contacted, we see Sagrada Familia in Barcelona. In the first shot of the building we see cranes standing next to it. In the next shot, the cranes have disappeared.

Continuity: In the part of the embassy scene where Matt Damon starts clobbering security people, the Marine's hat falls off no less than three times.

Continuity: When Jason and Marie are in the car prior to the car chase they have a conversation with camera angles switching back and forth in the car. From shot to shot the window glass is alternately covered with a lot of rain droplets, a few rain droplets, and even completely dry.

Factual error: When Bourne arranges the rendezvous on the bridge (Pont Neuf) the time is scheduled for 5 p.m. At this time, in winter, in Paris, it would be dark.

Continuity: In the scene where Jason steals a grey Ford Sierra, when Marie walks from the phone booth to the car (Jason is taping the window) she passes a red Ford Fiesta and there is a grey Renault Laguna behind it. The car they are stealing is out of shot. When they drive off their car is suddenly on the spot where the Renault was.

Factual error: Jason's Canadian passport has been issued in 1993 and expires in 2003. Canadian passports are only valid for five years. Submitted by Sereenie

Continuity: In the farmhouse scene Bourne looks out a window and it is bright outside. When he looks out the glass in the door and it is dark outside. When Bourne goes outside it is bright again.

Continuity: In the scene where Jason and Marie go to Jason's residence in Paris, Jason picks up a Bic Pen to write while he's talking on the phone to the hotel. He takes the cap off and places it on the back of the pen. In the next shot, the cap is missing from the back of the pen.

Continuity: When Bourne is escaping from the Embassy, he drops the bag, which hits some metal thing on the way down, making it wobble to and fro. The camera cuts away while it's still moving and we see the marines coming upstairs. When Bourne climbs under the fire escape, we can see down to the ground and the metal thing's stopped moving. All well and good, except after the marines leave Bourne looks down, and in that shot the metal thing is moving again, then stops - obviously the rest of the shot we saw before. Submitted by Jon Sandys

Revealing: When Jason climbs onto the rail of the fire escape, it is not attached to the wall - intentionally, it has not broken - but then in another shot, two seconds later, it 'breaks'. It pulls out of a visible hole in the wall, although it was never actually attached and there was no hole before.

Continuity: During the car chase there is a shot of Bourne steering frantically. In the centre of the steering wheel is a Mini badge. Cut back a few moments later and the badge has changed to a Cooper badge.