Factual error: Poirot meets the rest of the cast at the port of Trieste before they sail off for Jaffa. In actuality though, they already were in Jaffa, which served double duty acting as a very poor stand-in for Trieste; the architecture of the port and promenade is nothing like Trieste's, and you can see in the establishing shot Jaffa's St. Peter's church. (00:08:30)
Factual error: The two white jets they keep showing doing bombing runs, multiple times throughout this movie, are Air Force training jets, not combat aircraft.
Suggested correction: The aircraft are F-5 Tigers... They are absolutely combat aircraft.
I looked up the F-5 Tiger, and those planes do look similar to what I saw in the movie, but also very similar to films of training jets I've seen. Whatever those things were in the movie, they carried no bombs or missiles; they just flew over, and then stuff went off on the ground. https://www.military.com/equipment/f-5-tigershark.
OK - I think I found the answer - the F-5 Tiger is the combat aircraft and the F-5 Tigershark is the training version. They look almost the same but not quite.
Factual error: Aphrodite mentions Medusa as her friend at point. She was a Gorgon, a monster, killed by Perseus, not a friend to any of the Greek gods.
Suggested correction: That's just the most popular version of the ancient myth. But because the story is based on a myth, and not real events, the story can change. This would be like pointing out a factual error for a film changing the origin story of a comic book character. In the poet Ovid's (47 BC - 17 AD) telling of the story, Medusa was a beautiful young woman who later was turned into an ugly woman with snakes for hair by Athena after Poseidon's actions.
Factual error: When Tina and Jason are in the basement, she sprays gasoline at him. It's clear like water. Considering it's covered in cobwebs, it's been there a long time and would be dark in color, because it gets darker as it ages.
Factual error: In cooking class, the teacher said "two stalks of celery" and Michael handed Lorna one stalk, which she started to separate. One "stalk" is actually the entire bunch (or head), which is made up of 8-10+ "ribs" connected at the bottom. Two ribs will equal about one chopped cup - about right for the tuna walnut casserole made with one can of tuna. Americans typically use the word "stalk" interchangeably with "rib", calling a single rib/ stick/ branch a stalk, but the stalk is the entire bunch. (00:37:02)
Factual error: Radium Chloride (stated by the doctor to be the ingested poison) does have a slightly luminous glow to it, but absolutely doesn't have the intense shining bright green luminous glow that is shown at the end of the film in Professor Cornell's mug.
Factual error: Right before Elvira is burned at the stake, the officer pronouncing judgement on her says "By the power vested in me, by the sovereign state of Massachusetts..." Massachusetts (according to its own constitution ratified in 1780) is a commonwealth, as are Virginia, Kentucky, and Pennsylvania. Although the internal governments appear to be different, they have the same legal status as states within the United States. (01:17:50)
Factual error: The Los Angeles cops pursuing Lulu, Peaches, and Darlene in Mexico couldn't arrest them due to this being a foreign country where they wouldn't have jurisdiction.
Factual error: The events in the film take place in mid-1929, as evidenced by the first Academy Awards being presented in May. However, Wyatt Earp went to the happy hunting grounds in January of that year.
Factual error: Chucky blows out the pilot light in Eddie Caputo's house and, mere minutes later, there's enough gas for a single gun blast to then cause the whole house to explode. 1) It would take hours and hours for enough gas to fill up that house to present a safety issue; 2) By that time, Eddie would have unmistakably smelled it; 3) A gun blast wouldn't be enough to ignite that gas anyway.