Part of the film was originally set to have been filmed in Israel, but due to the sudden escalation of the Israeli-Palestinian conflict (in September-October 2000), and following the requirements of the actors' insurance companies, the filming took place in Morocco instead.
A pack of Morley cigarettes is used as a diversion in one part of the movie. Morley is the fictional cigarette company used in the "The X Files" (1993).
The scene where Robert Redford's character asks Brad Pitt's character if he knew anybody in 'this apartment house' and tells him to be up on one of the balconies in five minutes is from a book by former Mossad agent Victor Ostrovsky who describes this test as part of the training of a Mossad agent.
Kimberly Paige, playing the part of Sandy at the embassy in Berlin, is wife of the former US ambassador to Hungary, the location where the Berlin scenes were filmed.
The building identified as the US Embassy in Hong Kong is actually the headquarters of HSBC - the Hong Kong and Shanghai Banking Corporation.
In a nod to The Godfather (1972), where oranges signify disaster, Catherine McCormack's character is seen purchasing oranges right before she is abducted.
The film was dedicated to the memory of Elizabeth Jean Scott. She died in 2001 and was the mother of Tony Scott and Ridley Scott.
Nathan Muir's personal car is a Porsche 912, basically a 911 with boxer 4 engine produced for a short while in the late 60s.
Dutch Oscar-winning director Mike van Diem was once attached to the project.
In the scene showing black and white news footage, Stephen Dillane's voice can be heard (in his native English accent). This is cut from Welcome to Sarajevo (1997).
In the scene where Nathan enters his office after the CIA employees rummaged through it we can see director Tony Scott's faded red hat on the right next to the door.
Average Shot Length (ASL) = ~2.7 seconds. Median Shot Length = ~2.6 seconds.