This is the only Bourne film to win an Academy Award. It won three, in all the categories for which it was nominated, while the other Bourne movies weren't even nominated.
In the Tangier chase scene, Nicky, played by Julia Stiles, and Desh, played by Joey Ansah, are seen pushing past the citizens. These are not extras; Tangier was too crowded and the flow of the people was hard to control, hence the two are genuinely pushing through the crowd.
The film crew was unable to shut down Waterloo station, so pedestrians in the station can be seen looking and pointing at the camera.
When they were shooting in Tangiers, it was in the middle of the Muslim fasting month of Ramadan, where no Muslim can eat or drink during the daylight hours. Interviews in the bonus material reveal that several of the crew members were Muslims, and found it exhausting to do the movie while being unable to eat or drink. Matt Damon comments on how he would see them look "longingly at a cup of coffee or a sandwich". To accommodate these crew members, the remaining members of the crew tried to discreetly eat and drink.
The café in Tangier that Nicky Parsons chooses as a meeting place is the Café de Paris, which was a popular haunt of spies and emissaries during Tangier's years as an International City.