Continuity mistake: When Quatermain arrives in London, he is greeted by Reed who leads him down some stairs. In the shot where they're going down some spiral stairs, for some reason you see a different actor (who is clean shaven) posing as Reed, going down the stairs holding the umbrella in his right hand. Then in the next shot you see the "original" actor who has a slight goatee and is holding the umbrella in his left hand.
Continuity mistake: The invisible man is seen in one shot with cream covering the majority of the front of his face but it ends towards the middle of his head. When he is in the automobile, the cream is now completely covering his head and neck. Then, when they go to see Dorian Gray, only his face is covered with make-up again.
Continuity mistake: When the Phantom's men ambush the League at Dorian's residence Sawyer is seen joining them in revealing themselves and aiming at the League (you can tell it's Sawyer by his clothing and weapon). Then during the Phantoms speech Sawyer reveals himself again as if he was never there.
Factual error: In the first few scenes they show some newspapers. They show Tuesday April 10, 1899, then Thursday May 18th,1899. If April 10th is on a Tuesday, then May 18th can't be on a Thursday, it would be on a Friday. April 10, 1899 was actually a Monday, but May 18th that year was indeed a Thursday.
Plot hole: When the team plays back the record, it contains an extremely high-pitched tone which triggers the crystal sensors on the ship. But the speech on the record is low quality. This low quality would be the result of extreme frequencies being lost; but if they were, the trigger tone (a VERY extreme frequency) would be lost too. If the League's gramophones are capable of recording and playing such a tone, they should also be able to record and play back the speech without any quality loss.
Continuity mistake: When Quatermain realizes that Skinner is in his room (on the Nautilus), he puts out the lamp and the room goes black. We hear a scuffle and then the door opens and lights the room and we see Quatermain throwing the invisible Skinner out the door. But when Quatermain shuts the door, the room does not go dark again.
Revealing mistake: In the scene where Allan Quatermain is waiting for Skinner in the snow and the white tiger shows up, when the camera shows a close-up of Allan, there is snow inside his goggles on his head. If it is snowing hard and the snow inside his goggles isn't adding up, it should have been melting or been melted. But it doesn't change at all, which proves it to be fake snow. How did it get in there anyway?
Deliberate mistake: After Mina leaves the car in Venice, Sawyer just manages to avoid several obstacles on the way, including a bend in the canal. But in the first scene, where Sawyer swerves the car around, its front should have slipped into the water anyway, considering the speed of the car and the tightness of the street, which makes a sharp L-turn at such close quarters next to impossible. But then the scene jump-cuts, and the car is well past the hazard.
Plot hole: What on earth are those sailors doing with Hyde when he is chained up on The Nautilus? He is solidly chained to the floor and walls and they keep stepping up to him to allow him to swat them out of the way, risking injury or even death. They stand around like idiots as if waiting their turn to walk up to Hyde and be belted across the room. Why? Why are they even there? Hyde doesn't need subduing, and if he needed guarding they could do it without getting into range.
Factual error: When the League arrives in Venice, Carnivale is being celebrated. In the film they leave London in July and arrive there a few days later, but in Venice, Carnivale is celebrated on the last weekend before Lent - which differs from year to year, roughly between early February and early March.
Continuity mistake: In the scene on deck of the Nautilus where Quatermain and Sawyer practice shooting the target balls are lying in a row next to the railing, first five, then four, but before the last shot, four again, although another target has been catapulted into the water.
Factual error: How did they get the Nautilus up the Thames? Or into Venice? They'd have had to dredge the river to get it into London. Also, what's really under Venice? I thought Venice was built on a marsh, why would there be all those nifty tunnels and columns under there, why not just foundations and such?
Deliberate mistake: When the police officer is being ran over the tank you see him falling backwards. When it cuts we see his hat being ran over by the tank. However the way the officer was falling there is no way his hat could have landed under the tank's belt as it does in the next shot.
Plot hole: As the Nautilus makes its way along a canal in Venice, you can see a bridge ahead of it that is far too low for the sub to pass under. Yet without altering its running depth, the sub miraculously appears in the canal well beyond this bridge moments later, and that bridge is not damaged.
Continuity mistake: When The Phantom kicks Quatermain's gun along the floor we see the gun landing close to the wall. In fact the tip of the gun even sticks a bit in to a hole in the wall. When Quatermain a few seconds later picks the gun up the gun has moved at least a feet away from the wall.
Other mistake: In the scene when the League are attacking the factory, we see Captain Nemo demonstrating his skill with his sabre. In the last shot before the scene changes, he cuts down a number of people and then sheathes his sword all in one movement. The camera angle is from the side where his scabbard is hung, and although you can hear the hissing sound of the blade being sheathed you can see the sword completely misses the scabbard and is just stuck out behind him. This is obvious because the sword is silver and the scabbard is black.
Other mistake: In the scene right after the team gets a Morse code message from Skinner, we see the holes made in the Nautilus. The one in the middle is smoking whereas the one in the back is not. If the ship was filling with water to the point that is was immersed due to the holes then whatever explosive components would be wet and extinguished. So by the time the Nautilus resurfaced, it should not have been smoking at all.
Factual error: Apparently, Captain Nemo's submarine, Nautilus, is a shape-shifter. When it first surfaces next to the dock, it appears to rise easily 100 feet above the water, and that's only the visible part of the submarine; the bulk of the craft is still below the surface. This suggests that the water is a good 300 feet deep or more right off the dock, which is impossible. At this enormous size, it's also impossible that the Nautilus negotiates inland waterways, as when she goes to Mongolia. Strangely, we also see an overhead shot in which the Nautilus appears to rise only about 40 feet above the surface (compared to three-storey buildings directly adjacent).
Add timeCharles Austin Miller
Continuity mistake: During the brawl in Kenya at the beginning of the film, one of the goons is seen throwing knives at Alan which seem to pin him to the wooden pillar; yet in in a previous shot just before Alan slams the table onto one of the goons, the knives are already embedded in the pillar.
Other mistake: When Sawyer tries to take a shot at the Phantom just before he escapes from Dorian Gray's attic, Sawyer fires once, but two impacts are kicked up from the dusty floor. And the impacts come in to rapid succession for a manually operated rifle, even with a crack shot using it.
Continuity mistake: When The Phantom tells Quatermain to drop his gun, Quatermain drops it. It cuts and we see the gun landing with the handle pointing out. The way Quatermain dropped the gun the handle should be pointing in. The gun could not have changed angle that quickly when watched how it is dropped.
Continuity mistake: When Dorian Gray is shot with the machine gun, all the bullets are taken right in the gut, and the wounds are correctly shown in mirror-image when the back view of him is shown. However, the next shot of his front shows a couple of wounds in the shoulder, the biggest one being in his right shoulder at the very top, a wound which was not visible in the back view.