Factual error: When Harry is confronting the bank robber and the robber says he has to know if Harry had any shots left, Harry cocks the hammer which rotates the cylinder. If you watch closely when he pulls the trigger the cylinder rotates again. This can happen only when the trigger is pulled in double action mode (hammer down). (00:14:00)
Factual error: While Bond and Franks are fighting in the lift, you can hear glass breaking. However, when Franks picks up a shard of it to stab Bond, you can see it's really a piece of Plexiglass. When Franks is forced to let go of the shard, his hand shows no cuts or blood, which would have been unavoidable the way he had been holding it.
Factual error: The "B" train which he is chasing normally runs on the right most track (there are 3 tracks on this particular line). The middle one is never used except for out of service trains. Most of the train stations on that line service the right or left track, not the middle one.
Factual error: There are numerous references in the film about the type of jet, a Phantom, that crashes 60 miles outside of Piedmont, with a consultant at the crash site even saying "There's no rubber at all used in a Phantom F-4, General." The crashed tail-section of the plane at the crash site is and obviously not from a Phantom jet, but from a F-84 Thunderjet, a much smaller and older jet than a Phantom.
Factual error: In the opening scenes of a city deserted for several years, lots of smog can be seen at the base of the mountains in the distance. Smog is entirely man made and would disappear completely in a matter of days once all human activity stopped.
Factual error: The calendar in the police office indicates Tuesday January 27th and Thursday January 29th. That was in 1970, but this story takes place in 1971.