Continuity 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)
Continuity mistake: At the Air and Space Museum, a red belt between two stanchions blocks a room with a sign saying "New exhibit coming soon." After Elio ducks under the belt to enter the room, the belt and stanchions have vanished. (00:02:20)
Suggested correction: Once he enters the room, we never see the door again. All we see is an entryway leading to the exhibit.
Factual error: Spike is shown having a Power Rangers figure in his bedroom. The only problem is that it's from the Operation Overdrive series, which didn't come out until 2007, five years after the initial outbreak in 2002, isolating the UK from the rest of the outside world as a result.
Plot hole: The main character has opted to cut the Lusitania, a ship torpedoed in 1915 south of Ireland and a war grave with 1,200 killed, into 3 pieces and lift the middle section with a couple of flotation devices. The only chance they would have the Irish naval service not putting a stop to this within hours would be on St. Patrick's Day. Interesting as well that the prices are after the cut miraculously far enough apart that the lift goes without any hitch. And neither the Brits nor Irish object. (00:35:00)
Continuity mistake: When Serena climbs over their balcony railing and starts edging along the wall, her hair is all tied back. When she arrives on the other balcony and leans out to watch her dad climbing over, her hairstyle has changed; now there are a couple of braids loose over her ears. There wasn't time for her to change it (and of course she wouldn't be styling her hair while escaping from a gunman). (00:36:01)
Continuity mistake: When Alex and Brad return from their trip to New England, Brad pulls his car in front of Alex's apartment, right behind the parked Volvo on the street. After a few minutes of difficult conversation, Alex leaves the car, which is now much further behind the Volvo.
Continuity mistake: As the silver car comes to a stop after smashing into the black SUV, there are a few bullet holes in its left hand side. The driver's door has a few - there's a diagonal line of three. Everyone stops shooting as it stops, with no new holes in the door. But as the guy approaches to pull the door open, in a closer shot the whole side of the car is riddled - the driver's door is just a mass of holes. (00:32:35)