Character mistake: Chuck says the Thames Barrier keeps the Atlantic Ocean out; not true, as the Thames meets the North Sea, on the opposite side of the country from the Atlantic.
Character mistake: The end credits list one of the songs as "Score from Un Poste Al Sole." It is a misspelling. It refers to something played by the hotel TV inside Margaret's room, an Italian soap opera called "Un posto al sole," with an "o." (01:59:25)
Character mistake: When Stitch vomits the photo, it lands perfectly horizontally on the sand. When Lilo picks it up, the left side is suddenly half-buried in the sand.
Character mistake: An astronaut ends a radio communication with Major Montez by saying, "Athena 5, over and out." No astronaut or member of the military would use that phrase. "Over" means "please respond." "Out" means "I am ending this communication." (00:18:05)
Character mistake: Pearce is sitting with his mother, drinking from a glass with his left hand. In the next shot, the glass has suddenly switched to his right hand. (00:25:38)
Character mistake: The Georgetown University camera feed for "Faith" lists irrelevant personal info like "Mark Goodman - Baby Daddy" alongside "Biomedical Research," while showing "Threat Analysis - Unclear." If she's not flagged as a threat, why is she being tracked at all? And why is gossip-level relationship info in an intel overlay?
Character mistake: Noel says that Sam Clarke, the British Prime Minister, is the only head of state who isn't really a head of state because the King is. In fact, the British PM isn't head of state at all, but head of government. And this is common in many countries throughout the world, with a monarch or president as head of state and a prime minister as head of government. The American-style system of an executive president who is both head of state and head of government is in the minority.
Character mistake: Heidi Heatherley is referred to and addressed more than once as Dame Heatherley. Dames (and knights) take the title before the first name, so she should be Dame Heidi. It is surprising that a journalist, in particular, would not know this.