Revealing mistake: Right at the start, when all the police cars skid to a halt, there are tyre marks on the ground from previous takes. (00:00:30)
Character mistake: When Simon Ross shows Interpol a picture of Jason and Marie together in the coffee shop to Ray Willis the photo shows Marie with a dark bob cut. She didn't get that cut until they were "on the run" and no agency would have had her looking like that. (00:06:48)
Character mistake: As Jason reads the Guardian Newspaper, he finds an article about himself entitled, "Who is Jason Bourne?" The caption for the article reads, "His code name is Jason Bourne, but he had many identities, each one seemingly more deadly then the next," instead of "more deadly than the next." (00:12:50)
Factual error: When Bourne is traveling to London on the Eurostar from Paris, immediately after the 'flashback' where Marie floats away after being killed, there are two helicopter shots of the Eurostar traveling to London. The second (far away) shot shows the train passing over a motorway. The train is actually traveling towards Paris, and therefore away from London. The motorway is the M20 and the bridge is approximately 3 miles west of junction 9 for Ashford (Kent). The train would have been 10 minutes away from entering the Channel Tunnel. (00:13:45)
Factual error: When Jason is in the Internet Cafe in London he Googles for Sewell and Marbury, when he gets the results he doesn't have "The "AND" operator is unnecessary - we include all search terms by default. [details]" which should have been displayed just below the search box. (00:28:55)
Factual error: When Jason is at the internet cafe googling the financial company, the address that comes up for Sydney is not technically possible. The street name (Market Street) is real, but the street number was 18017 which is not possible as the street is only a few blocks long and ends at about 400. (00:29:00)
Factual error: When Bourne googles Sewell and Marbury, the Sydney address that shows up has a lot of errors. The street number would not exist (too many digits), and the postcode is wrong (also too many digits). The phone number area code is also incorrect and does not include the country code (+61). (00:29:01 - 00:30:00)
Continuity mistake: When Desh goes to meet Nicki, he parks his scooter. Walking behind him(from left to right) is a guy wearing a black shirt with orange stripes. The camera then switches to Bourne and then back to Desh. The man in the shirt is now seen walking towards Desh(from the left) but is still at least 40 feet away from him. (00:53:40)
Revealing mistake: In the commentary, the director states that the crowds in Tangiers were real, not hired extras, and that therefore there was an effort to avoid having them look at the camera. However, when you can see the crowd walking up a street, their backs toward the camera, while one man (to the right) faces the camera while holding his cell phone up. He is obviously taking pictures of the camera crew, probably unaware of the fact that he is being filmed, as it seems the shot is filmed from afar. (01:01:50)
Continuity mistake: When Pamela Landy is looking at Jason Bourne's induction paperwork, the date of his induction is 06-01-1999. However, the date of his first assassination (Neski) is 1998. The assassination of Kyriacou is also listed as having taken place in 1998. Both dates are obviously before he had completed the Treadstone induction. (01:11:55 - 01:13:25)
Other mistake: In the end credits, Gavin Greenaway, the conductor of the orchestral score, is credited as "Gravin Greenaway". (01:46:50)
Continuity mistake: When Bourne is talking to Firsch, the gun he is holding changes from a Glock in the shots facing Bourne, to a SigPro when the shots face Firsch.
Visible crew/equipment: Many shots when they are in the CIA building, you can see the cameraman in the glass walls.
Continuity mistake: When Landy is looking at Jason's file it says his blood type is A+. When Jason looks at his old dog tags it says his blood type is O-.
Continuity mistake: Noah Vosen's face goes from completely clean shaven (very smooth and shining skin) to very short stubble and back again when explaining the secret project to Pamela Landy in his office.
Continuity mistake: The conversation Bourne has with Landy at the end of The Bourne Supremacy is repeated in this film, about an hour and fifteen minutes in - the conversation is absolutely word-for-word identical, so clearly it's the same one. However, in Supremacy, it is a bright, sunny day, but in Ultimatum, the weather is overcast with snow on the ground. Landy's phone rings in Supremacy, but vibrates in Ultimatum. Finally, the other agent doesn't enter her office during the phone call in Supremacy.
Continuity mistake: In the chase scene involving Bourne and Desh, when Bourne comes to a stop on the rooftop, his jacket is zipped. In the next shot his jacket is open. In the next shot his jacket is zipped, as he begins to run again.
Continuity mistake: When Bourne is fighting with Desh in the bathroom scene, the wash basin gets broken off the wall.But in the next camera angle it is back in place again.
Continuity mistake: When Desh is chasing Nikki and Bourne is chasing Desh, in a shot of Bourne from overhead, he is wearing black converse type tennis shoes (black with white rubber on the toes). As the chase continues, Bourne's shoes are shown several times to be solid black.
Other mistake: At the beginning of the New York chase sequence where Bourne is walking down the street, you can see an Asian man smiling right into the camera for a second.
Answer: Knowing Bourne, he must have had a keycard on his person. Remember that Landy guided Bourne back to the CIA New York Headquarters; she could have easily slipped a keycard in the Taxi Cab when Bourne was being picked up at the airport. All he would have to do then is avoid being detected by using the fire exits (hence going through the back).
Jason Riley