Factual error: The villain performs his hit at the beginning of the movie by remotely changing the GPS destination of a cab, so they head to the wrong place and into an ambush. Assuming that neither the cabbie or Pope notice the change on screen, and that his sophisticated software silenced the voice announcement of the course being recalculated, and makes the new place also marked as the old one (it is after all a god-like movie software), the trick is done on on a London black cab, whose drivers are notorious for "The Knowledge", aka being required to learn the entire topografy of the city in one of the most demanding training courses in the world, and not using GPS. It'd be definitely unlikely for the cab driver to be totally unaware, to the point of Pope himself noticing first that they are at the wrong place.
Factual error: When Mr. Gaunt puts the jacket on Hugh, he says it's 1955 all over again. The flashback occurs and Jerry Lee Lewis' "Great Balls of Fire" is playing on the car stereo. However, "Great Balls of Fire" wasn't released until 1957.
Factual error: In the beginning, it's 1989. The crew chief, Michael Rooker, is wearing Mechanix gloves... which didn't come out until the 1991 Daytona 500.
Factual error: Poirot attends a Halloween party in Venice in 1947. Halloween was never publicly recognized as a holiday in Venice or Italy in general in the XX century, especially with the traditional pumpkin-centered iconography. One could argue that, for the most part, Poirot is attending a private party organized by an American soprano. But, besides how unlikely it would be for 1947 Catholic nuns to take part in such a pagan-themed event, there are scenes showing Halloween decorations in the streets of Venice far away from the party location, as if it were a public holiday and not a private gathering from an eccentric foreigner.
Suggested correction: Besides what Oliver says to Poirot in the beginning about Americans bringing over Halloween to Italy, it's not true. Halloween has a European and Christian origin. A day called All Hallow's Day on November 1st has been a national holiday in Italy since the 9th century. There have always been activities in Italy the evening prior to All Hallow's day. This includes games, themes of death, carved pumpkins (turnips before), and masks ("guising"), all of which are very old traditions done all over Europe.
Being Italian and having lived in Italy for the past decades, may not make me an authority over all things Italian, but I can assure you that Ognissanti (which is what you quote as being "All Hallow's Day," since we obviously haven't been borrowing English names for our festivities) has never been observed as a national holiday with anything remotely close to what is shown here, which is, like Ariadne Oliver says, plain and simple Halloween. Like I said in the entry, it'd be perfectly fine for Americans to celebrate it, but no pumpkin banners in the public streets and parades with people shouting "Happy Halloween!" with nuns in full garb, no less! Halloween has never been celebrated here with any mainstream fanfare until the very, very recent years.
Factual error: Otisville Prison was not in the direction Monty's father was driving. He said he would take the Henry Hudson Parkway north and later continue on the Taconic Parkway. The Taconic runs due north toward Massachusetts on the east side of the Hudson River. Otisville is 30 miles west of the Hudson.
Factual error: Contrary to what the movie states, priests can be elected Pope - they are simply elevated to the rank of Bishop before taking the office.
Suggested correction: Him being only a priest was simply an excuse not to elect him. Those who did not want him to be pope were trying to find any reason to keep it from happening.
Any baptized Catholic male can be elected pope, although it has only happened once. Pope John XIX in the 11th century was a layman, ordained after his election.
Factual error: When Bradley Cooper calls Louis C.K. he asks him, "Where are you?" Given he's just called him on his office number, rather than a carphone, he knows exactly where he is.
Factual error: When Jordan tries to escape with his daughter in the Mercedes, he pulls the parking brake with his hand (a hand-type parking brake) to stop the car, but that car (Mercedes Benz SL Class R129) is only available with a foot-type parking brake, making his action impossible. (02:43:35)
Factual error: In the early part of the movie, there is a shot of the outside of Triple O's bar. The scene takes place in 1975 and "Coors" is advertised on the outside of the bar. Coors beer was not available in Boston/East Coast in 1975. It was only available from the 1980's.
Factual error: The heist took place in April 2015 but the car registration plate of the ex copper is a "16" plate, which wasn't available until March 2016.
Factual error: In Federal Reserve cash processing facilities, multiple denominations of money are never allowed to mingle.
Factual error: A person with 60% burns on his body would not be wearing pyjamas, as the Hungarian guy does. (00:19:45)
Factual error: In the scene where Trey's father shoots at the burglar the gun punches baseball sized holes in the door. A .357 Magnum bullet going through a thin wooden door would just punch through, without expanding or tumbling, and leave a hole only a bit larger than the bullet diameter.
Factual error: After Robocop stops the criminal from robbing the convenience store by bending his machine gun, the robber tries to run past him, only to get clotheslined by Robocop. The direction the robber flies after getting hit defies all physics. (00:35:15)
Factual error: The opening states the location as Bristol, England. Santa is drinking in a pub on Shirely Street (neither the pub or the street exist in Bristol), then shortly after is shown leaving from the rooftop, on his sleigh, with multiple high rise buildings in the background. Bristol does not have high rise buildings in the main city centre, only a few blocks of flats, which all have flat roof tops, not like those depicted.
Factual error: The motel's billboard advertised HBO, which did not exist in 1971 when the movie was set.
Factual error: In the scene where Hobbes is talking to Reese in his cell, Reese talks to him in a foreign language. It's stated on at least two occasions that Reese is speaking Dutch. He isn't - he's speaking German.
Suggested correction: It's Dutch. "Wie de bal kaatst." Just what Reese said. "What goes around..."
Factual error: After the scene where Frank Castle steals the bus to rescue the children, the mobsters are firing at the bus. Not one bullet pierces a hole in the bus. Who knew Public Transit was bullet proof?
Factual error: In the scene where the fire department responds to the fire, the engine is 42. Yet all the fireman's hats say 6. The engine company, station etc. would all be the same number so their helmets should have also been 42.
Factual error: At the very end of the movie, the Pope gives the nuns a standing ovation. The other people seated in the box with him should have immediately risen at this time. Instead, the man seated to his left looks up at him, seeing that the pontiff has stood, but makes no movement to join him on his feet.