Factual error: The U.S. military would never get involved in any civilian criminal apprehension in the USA - that's what federal and local authorities are for.
Factual error: Tom lays down on the couch and turns on the (off-camera) TV, only for his wife to immediately tell him they're out of milk. The audio from the TV is someone talking about a NY Rangers hockey game, as they mention (Jeff) Beukeboom and (Mike) Richter. The film is set in 1992, but the TV says Beukeboom has just scored his 7th goal of the season. The problem is Beukeboom only scored 7 goals once: in 1994 (two years after the movie takes place). And the TV says the goal was unassisted; but the lone time Beukeboom scored his 7th goal of a season, it was assisted by Mark Messier and Mike Gartner. (00:32:20)
Factual error: Rupert is driving Julia to the airport but the road signs for I-90 and Mannheim Road are at Ohare airport. She seems to leave from Ohare and arrive at Ohare. (00:10:08)
Factual error: During the battle in the throne room, a soldier is seen hiding behind a pillar. Then Telemachus comes and swings his sword clockwise. However, we see the soldier getting hit by the sword, hitting the pillar, and then falling to the ground. This only could have happened if Telemachus had swung his sword counter-clockwise.
Factual error: When we see the detective pour the sample of Martin's sperm onto Joyce's body, the liquid is thick and bright white, like PVA glue; however the detective acquired the sample several hours earlier, and ejaculate loses that appearance/consistency almost immediately (30 minutes at most), becoming thinner and almost transparent.
Factual error: The establishing shot of the film shows an art gallery with the subtitle 'The Royal National Gallery, London'. Not only is there no such museum (its closest match being simply the 'National Gallery'), but the shot actually shows the Tate Britain, complete with visible red banner outside saying 'Tate Gallery'.
Factual error: In early scenes, Lieutenant Commander Ramirez is wearing insignia for Lieutenant, not Lieutenant Commander. Later scenes have him wearing the correct insignia.
Factual error: At the Spanish restaurant, the TV newsletter broadcasts a senator speaking, and the title "Sénador" below. The word has no accent mark.
Factual error: The opening line references a solar eclipse happening in Italy on October 13 1996, but gets it one day wrong. The phenomenon happened on October 12. (00:00:30)
Factual error: George's "dog", Shep, is an Asian elephant. However, the jungle scenes take place in Africa.
Factual error: I seriously doubt that any police detective would single-handedly go and question any suspects alone. By themselves, at least two or three officers will be present when going to any address of a suspect for questioning, in case of a dangerous encounter.