When Dr. No's men pass by in a boat and shoot at the shore where Bond, Honey and Quarrell are hiding, their commander shouts "We'll be back - we'll be back with the dogs!" into a megaphone, which has an echo effect. He then lowers the megaphone and waves his arm as he shouts "Full Speed Ahead!" - which has the same megaphone/echo effect, despite the lack of megaphone use.
The song the band performs in Puss Feller's club is different from the soundtrack: the conga strikes, the singer's lip movements, the bass player's fingering, and the dancers' movements all do not match the song heard in the film.
The Beretta pistol that Bond has at the briefing is a model 1934 and was never chambered for .25ACP as mentioned. It was only chambered in .380ACP (9mm short) which is more powerful than 7.62mm (.32ACP) that Boothroyd states the Walther (also available in .380ACP) is chambered for. When Q branch gives Bond his Walther PPK, it's really a Walther PP.
During the rocket countdown, the commentary from Cape Canaveral says that this is the launch of the MA-7 (Mercury-Atlas 7) mission. This was Scott Carpenter's flight as part of Project Mercury. Just a little later the rocket is reported as being at its full weight of 240, yet the launch weight of the Atlas rocket was only just over 100 tons.
After Honey is finished being showered and decontaminated, the technician passes a Geiger counter over her and reports, "Practically zero - she's clean." However, in the very next shot, from the side, Honey is plainly seen removing her hands from the machine used to decontaminate radioactive particles from the fingernails. This action is redundant.
Annabel Chung appears early in the film to take a picture of Bond for Dr. No, later she gets caught and claims the first time Bond's face was blocked by his hat. However, when we first see her Bond wasn't wearing his hat, he was holding it.
During Bond's shootout with the "Dragon" on the beach, he uses three different model handguns. His Walther PPK, changes to a Colt 1911 Government Model, then to a Browning Hi-Power, and then back to a Walther PPK. His gun also goes into slidelock (indicating empty) twice while shooting, and without visibly reloading, continues to fire.
One of Bond's traps in his room is his briefcase; he puts talcum powder on it. When he is done he sets the case down on the right side of the table. To the left is a mirror and by the mirror is an assortment of perfume bottles and a shaving bag. When he returns, the contents on the table are reversed exactly, and the perfume bottles are replaced by a magazine.
When Bond is waiting for Professor Dent to arrive at Miss Taro's house, he pulls out his Walther PPK to attach the silencer. In closeup, however, the pistol is actually an FN Browning 1910. This can be verified when the camera zooms in Bond when he's attaching the Braun silencer to the pistol. You can see the letters FN inscribed on the grip of the pistol. The pistol was used in the scene because the film production's weapons specialist couldn't find a silencer that would fit the Walther PPK that Bond was issued.
We see James and Honey washing themselves in the river after avoiding the dogs. Honey has clearly taken off her swimsuit top and is wearing only her white shirt. As they run to the bank, she is not carrying her bra/bikini top, but in the next scene, when their shirts are both dry, she has her bra/bikini top on under the white shirt.
When shooting at the "dragon", Bond's gun changes from a Walther PPK to a Colt .45. His gun also goes into slidelock (indicating empty) twice while shooting, and without visibly reloading, continues to fire.
When Bond is driving to Miss Taro's house in the hills, he's being chased by a couple of people in a LaSalle hearse. We see Bond and the hearse swing round a corner and head toward the camera. We then see a shot of Bond and then another shot of the cars coming around the same corner (you can tell by the small bush on the right side of the hill next to the road). In fact the same location is used in 3 separate takes from the exact camera position.
When Dr. No crushes the gold Buddha statue at the dinner table with his hands, it falls off the table onto the floor. However, when a wider camera angle is shown, right before the guard takes Bond to the elevator, the gold statue is back on the table.
The car that Felix Leiter hops in at Kingston International Airport is a 1961 Chevrolet Impala pillared sedan, but the car that is used in the chase scene on the highway (in which 007 is in a 1957 Chevrolet Bel Air convertible), is a 4-door pillarless sedan.
When Bond and Dent are together and Dent tries to get the gun with his foot, there are several continuity issues: the gun is very close to Dent's foot when there is a close-up, but then further away in the next image. Also, there are wrinkles in the cloths and then they are flat. In addition, after Dent has "had his six shots," the slide on his Smith & Wesson semi-automatic is in the back, or "empty" position; when he later tries to grab the gun, the slide is in the forward, or "loaded" position.
When James lights his cigarette and Sylvia asks to raise the stakes, he first has removed the cigarette from his mouth and placed his hand on the shoe, but when he says, "I have no objection, " he is just taking it out of his mouth. The camera cuts to his back, and his hand is back on the shoe. The cigarette jumps between his hands and mouth several times.
When you see Bond in his hotel room for the first time, there are two bottles on the table, a clear one and a green one. When he reenters the room and checks his traps, the green bottle has disappeared. Bond takes a bottle from a drawer but that also is clear so what happened to the green one?
When James Bond sits down with Annabelle at the club, the camera strap is around her neck. When they do a close-up shot of her the strap is gone. In the next shot, James is taking the strap and the camera from her neck.
When they are on Crab Key, Quarrel tells Bond that the dragon is coming and Bond says; "This time I want to see it for myself." Despite it apparently being close by, they walk for ages and the day goes from bright daylight to being dark, obviously some hours later.
After Bond and Honey's encounter with the patrol boat on the beach she retrieves her shirt from her shot-up boat and they both run off into the jungle barefoot. In the following scenes they're both wearing shoes.
When Bond is laying in wait in Ms. Taro's darkened house for his (then) unknown assailant, a man is seen walking up the embankment in a black jacket and slacks. Bonds attention is aroused and we see the door open reveling a handgun with silencer. The gun shoots 6 times then it is revealed it is Dr. Dent in a much light beige jacket and white slacks. Dent is also much taller than the man walking up the embankment.
This is because it was a re-used shot of Bond walking up to the house earlier, only flipped and darkened to disguise it.
Three different scenes of the car chase were recorded in the same bend of the road even without changing the viewpoint of the camera. Just check a small rock on the road at the lower right corner of the image.
At the dinner with Dr No Honey is wearing pink trousers. The next time we see her is when Bond rescues her from the ramp and the trousers have now disappeared and do not look to have been replaced by another pair/skirt.
When Honey first meets Bond on the beach, she removes her knife from its sheath to confront him. When she returns the knife to the sheath hanging from her waist, it jams going in, making it top-heavy, causing it to hang handle-down. She then picks up shells from the beach with both hands, with the knife still handle-down. In the next shot, a second later, with Honey's hands still holding the shells, the knife is shown fully-seated in the sheath, blade-end down.
When Dent sneaks into the room and shoots the pillow 6 times, you can see him after he notices Bond. When he does come in, you can see his tie really messed up and the back of the tie you can see the label. When you see the shot again, when he sits down, the tie is tucked in and it is straightened.
After Bond's dinner with the good Doctor, in his cell, he uses one of his slippers to beat on the wire grate after it shocks him. When he crawls through the opening, he has slippers on both feet. Also, he may have lost or gained a slipper when moving through the drain tubes.
First time Bond speaks to Quarrell painting on the beach.
Quarrell puts the paint on the reversed boat, close to a paintbrush.
Seconds later, the paintbrush has moved a little far away of the paint.
Also, the paintbrush in the paint has moved from left to right.
In the close-up shots of the group hiding under water and breathing through bamboo stalks (which are supposed to be reeds), the tops of the bamboo stalks are sticking out of the water at least a foot, but in a couple other shots from further back, only one bamboo stalk is visible and the top of it is right at water level and in one case even disappears under water.
When Bond, Honey and Quarrel are hiding underwater in the reeds, he warns not to disturb the mud which would cloud the water. When the guard approaches just before Bond kills him, the water is completely clouded. In the next shot, the water is clear again.
Two GPO 706 Ivory telephones on a desk, handsets on their cradles in apposite directions, left and right-hand, then when JB walks to a table to pick up a parcel, both handsets appear the same way with handset curly cables on the right. Cut back to the desk and they're both different as they were before.
When Honey tells Bond that the one shell alone is worth $50 in Miami, she tries to shield them from him. A piece of equipment is seen bobbing at the bottom of the screen. The full shots of them reveal no such piece of equipment.
At the airport on Jamaica, when Bond uses the telephone booth, you can see the lighting and crew members reflected in the glass door as he opens it to walk in and out, also when Felix opens the door you can see them again.
When Bond rescues the shackled Honey Ryder, he encounters a guard on a small platform on top of the stairs, when Bond enters the room. Bond punches the guard, who falls over the railing - seen in a close-up. When Bond go down the stairs, you can clearly see the stuntman lying on the cardboard boxes and thin mattes that were used as his landing pad.
Quarrel indicates that he visited many nearby keys with Strangways, taking various ore samples. Jamaica is essentially a single large island. Except for a few tiny near-shore islands in bays and coves, there are no out-islands near Jamaica and certainly no large private islands such as Crab Key. The suggested geography is more like that of the Bahamas, two to three hundred miles north with Cuba standing in between.
When Bond has the conversation with Felix in the bar, Annabelle smashes a flashbulb and scratches Quarrel's face with it. Flashbulbs of that era were filled with oxygen to provide a good flash. Unfortunately they often exploded so they were covered with a thick plastic coating to prevent this. If the bulb was smashed the plastic coating, which is clearly seen as burned and blistered when she smashes it, would have kept the sharp edges safely inside and Quarrel would not have been harmed.
Dr. No offers Bond a martini, shaken not stirred. Bond asks if it is vodka and No replies yes. However, any knowledgeable drinker and bartender would know it makes no difference whether a vodka martini is shaken or stirred. Only with gin martinis does it matter, as shaking it lessens the alcoholic effect.
The speedometer of the '57 Chevy shown in the chase scene is actually that of a '57 Ford. Also, the close-up shows a black steering wheel and dashboard whereas the Chevy has an obvious red steering wheel and dashboard.
The Bren Gun seen on the patrol boat has no magazine attached when it is first shown. Later, when supposedly firing, the magazine, which fits on the top of the gun is being held in place by hand ....and backwards.
Although she operates the transmitter and switches from transmit to receive and back again, she has never switched on the receiver (presumably the unit to the right of the transmitter.) She seems to operate the transmitter as though it were a receiver. At one stage while on receive, goodness knows why, she adjusts the loading knob for the transmitter output.
After she is shot, London continues to call her, even though the operator in London says her transmitter is still on "broken, just voice; the carrier wave is still established." The problem is that there is no modulation (voice) at all, just the unmodulated signal (carrier wave.) If her transmitter were still running there is no way she ever could have heard London as you can't listen on the same band, if your transmitter is running at the same time.
When Strangways' secretary is calling London early in the film, she operates the radio transmitter built into the bookcase. The transmitter is a British KW Vanguard designed for the amateur (ham radio) bands using amplitude modulation (AM) and Morse code (CW) running 50 watts input to a single 6146 transmitting tube (valve.) Communication using ham frequencies in the 20 metre band would be difficult due to interference from other higher-powered stations and would have been highly insecure.
While looking at a photo with Superintendent Duff, Bond claims that Quarrel was the man driving the car that followed him from the airport. The two speeding cars were never closer than 30 or 40 yards from each other. Bond could not possibly have made out who was inside, in the shadows, through two windshields.
Further into the Cell escape scene as Bond crawls through the vent pipes, he has to secure himself to avoid being washed away by a sudden rush of water coming through the pipes. Water cannot be flushed through air vents.
After waking in a cell after being knocked unconscious during dinner with Dr. No, Bond is shocked while trying to punch out a grate in the air vent. He then uses one of his rubber soled shoes as a glove to insulate his hand. As Bond was standing on a bed wearing rubber soled shoes, he would have already been insulated against the electricity guarding that vent.
When Quarrel and Bond are getting ready to confront the "dragon", Bond tells Quarrel to go for the driver and Bond will go for the lights an tires. Earlier, they see "dragon tracks" which are from a tracked vehicle, not one with tires.
Repeatedly the space flight is referred to as a "moonshot" but the flight is also referred to as a Mercury flight. The Mercury program was NASA's first step into manned spaceflight - single seat aircraft focused on low earth orbits.
When Bond is sliding down the pipe, a gush of water sweeps over him. However, later, when he emerges from the pipe, he is in a hallway with no trace of the water. However, in the last few seconds of this sequence, he is clearly climbing a diagonal shaft toward the ventilation grille. Though it is odd for air ventilation for an underground facility to share a shaft with some kind of waste-water disposal system, the water would not likely have come out of the ventilation shaft.
Bond sets traps in his hotel room, including the closet, but is wearing a darker suit when we see him check them later. He changed suits in his room and reset the traps afterward; we didn't see it happening because it wasn't interesting.
After the last guard passes them while they are hiding in the river and Bond emerges from the hiding spot to kill the guard from behind with Honey Ryder's knife, she asks him why he killed the guard, and Bond says because he had to. However, the guard had already passed their hiding spot in the riverbank and was unaware of their presence and they could have just as easily stayed hidden under water as they did when the first group of guards passed with a dog.
Though possibly done for comical or film logic purposes. It makes no sense (given the severe consequences of what actually (could've) happened at the end of the film) for the Nuclear Reactor to have a "Danger Level" setting on it considering the possibility of someone doing the same thing bond did (accidental or deliberate), or a malfunction of the machine suddenly going to that setting.
When James is riding in the 57 Chevy convertible from the airport to the hotel, a close up of the engine temp gauge indicates "C" for cold. But by this time, the engine would be at operating temperature with the dial centered between "C" and "H."
When Bond and Honey are made to take showers to clean them of any remaining radioactivity, they are meant to be naked. When Honey gets out of the shower a man holds a towel up for her, but if you look closely you can see that she is wearing a flesh-colored swim suit.
When James and Honey are taken to their quarters after being decontaminated and given blue robes, they sit down and both have cups of coffee. The coffee is drugged and Honey is the first to succumb and falls unconscious. As James is fading, he realizes he's been drugged and smashes the coffee cup. Although unconscious, Honey still JUMPS from being startled by the noise.
When Honey is getting dressed from the wardrobe in Dr. No's lair, she has her back turned to the camera and is supposedly naked. However, for a few frames before she turns towards the mirror, something can be glimpsed covering her breasts (obviously to preserve the actress's modesty).
When Bond and Quarrel are shooting at the dragon, Bond's first shot misfires; you can see the hammer fall, it doesn't fire, he shoots a look at Quarrel as if to draw attention away from the mishap, and continues to hold the gun on aim as if nothing happened.
When Bond is driven away from the airport, the camera shows the speedometer of the car at 70 mph, and other elements of the instrument panel. The temperature gage is flat in the C position, indicating the engine is not running .
At Government House, Bond shows the commissioner the 'cyanide Cigarette'. This is clearly just a cigarette broken in half, no phial of Cyanide or missing tobacco that the driver would have had to ingest to get poisoned.
The goof items below may give away important plot points.
The hearse used by the Three Blind Mice after they shoot Strangways' secretary and to chase Bond on his way to Miss Taro's house is a 1939 LaSalle , which is also used in the rear-projection shots for the car chase. The vehicle which goes over the cliff, however, is a 1941 LaSalle. You can tell them apart easily as the 1941 model (the hearse that goes over the cliff) has headlamps mounted flush with its fenders, at the extremities of its wings, while the 1939 LaSalle's headlights are the earlier torpedo shaped style, mounted much closer to the radiator grille/hood.
At the end when Bond and Honey are in the small wooden boat there is no tow rope visible. When the rescue vessel shows up and announces they will give them a tow a heavy duty tow rope is seen draped over the stern.
Before Bond shoots Dent, he says "That's a Smith & Wesson and you've had your six." Dent's gun is clearly a Colt Model 1911 which holds seven rounds (or eight with one in the chamber). Also, after Dent fired into the bed, the slide locked back indicating the weapon was empty so there was no reason for him to pick it back up and try to shoot Bond with it.
Realistically, overloading a nuclear reactor of that size would have resulted in an explosion that would have spread radioactive fallout over Jamaica, Cuba and Haiti, and rendered portions of Jamaica uninhabitable for over a century. But naturally, this is Bond movie physics and things don't work as they would in real life.