Continuity mistake: When Brent hears a horse in the distance, he goes to take cover behind the wreckage of the ship. In the mid-shot from the side, Brent looks over the ship and just to the left of the huge tear in the ship is some sort of scratching in the ship's paint. In the previous shot, as Brent ran over to the ship for cover, the scratching marks were never there. (00:09:30)
Continuity mistake: As Nova approaches the wreckage of the ship, Brent is shown hiding and holding the shovel in his hand. In the wide angle, the shovel is held almost up to Brent's chin, but in the sudden close-up of Brent, the shovel is suddenly lowered with no time to do so. (00:09:55)
Continuity mistake: When Brent and Nova first meet, in the reverse angle where Brent says "Don't be afraid. Just tell me where I am", his shovel is shown to be slanted to the right. In the next shot, the shovel is suddenly mostly level. (00:10:15)
Visible crew/equipment: When Brent is standing in the black crash-landing crater talking to Nova, two of his camera marks are visible behind him: They are made of white tape on the black ground. Seconds later in a wider shot they are gone. (00:10:30)
Plot hole: Brent discovers that Taylor is on the planet and has a connection to Nova through the dog tags she is wearing. However, throughout the first movie, Taylor never had any dog tags on his person. Also, his ship was destroyed, and he only managed to retrieve a life raft and supplies. His belongings and clothing were taken from him when he was apprehended by the apes. Taylor should never have had any dog tags to give to Nova or for Brent to discover. (00:11:10)
Continuity mistake: In a flashback sequence of Taylor and Nova, Taylor is trying to get Nova to say her name. In the shot where he is gesturing the word "Nova" with his lips and repeating the name, the end of this shot shows a strand of hair flying over Nova's face and her hair is blowing backwards. In the next shot, the hair strand is gone and her hair is blowing forwards. (00:11:30)
Continuity mistake: Taylor walks over to the stone wall and tries to hit it with the rifle. In the close-up, as he aims the rifle at the stone wall, you can see his left hand is wrapped around the butt of the rifle. Between this shot and the next shot, Taylor's hand switches which side of the rifle butt it is holding. (00:11:40)
Revealing mistake: When Ursus is giving his speech in the Ape city, many of the Chimpanzees and Orang-utans are wearing incredibly fake-looking masks. (00:17:15 - 00:19:50)
Continuity mistake: When Zaius and the general are in the sauna, as Zaius says "Well, General. I only pray you know what you're doing" and the general says "How can you have any doubt, Dr. Zaius", Zaius' hands are on his lap. Next shot, his right hand is suddenly placed on his face. (00:22:00)
Continuity mistake: In the sauna, when the general says twelve of his finest scouts vanished and Zaius corrects him by telling him it was eleven, there are visible steam clouds around them. The general then stands up, and the steam cloud around them has suddenly vanished. Some steam is still visible, but the steam around the two has definitely vanished. (00:22:25)
Audio problem: When Zira and Cornelius return home discussing stuff, Zira begins making chocolate icing. As she makes the icing, she says "Gorillas are cruel because they're stupid." When she says "stupid", her lips never purse together on the "p" but that doesn't stop her from being able to say "stupid." (00:24:15)
Continuity mistake: Zira says "Have you a horse?", Brent says "Yeah, out in the scrub." In this shot, Brent's left arm is facing Zira. Next shot, Brent is suddenly sitting about 90° to the left and his left arm isn't facing Zira. (00:29:05)
Continuity mistake: When one of the apes shoots the horse, Brent and Nova fall off the horse and land about six feet away from it. Shot cuts and they are suddenly only about two or three feet away from it. (00:31:00)
Revealing mistake: As Brent and Nova run away from the apes, they get caught in a net. You can see they are both wearing shoes, even though they are supposed to be barefoot. (00:31:45)
Visible crew/equipment: A human riding a horse is knocked off into a pile of hay. When the rider lands hay falls off the pile, revealing an air bag. (00:32:44)
Revealing mistake: When Brent is attempting to get the reins for the horses after escaping his wheeled cell, you can see a second set of reins going through the wooden holes to where a driver is hidden. When he gets the fallen reins, the second set is no longer there. (00:38:00)
Factual error: James Franciscus arrives at a New York City subway station called Queensborough Plaza. Queensborough Plaza is an above ground station. Queens Plaza is the name of an underground station in New York City. (They are located within walking distance of each other, but are definitely distinct stations). (00:40:30)
Factual error: Brent enters the underground area via Queensborough Plaza. He and Nova walk some distance through (sewers?) and emerge outside the main branch of the New York Public Library, located on 5th Avenue and 41st St. in Manhattan. I'll concede that that's possible, since we don't really know how much tunnel they walked through. (It's about 2 miles and includes crossing the East River.) Only moments later, they're in front of the New York Stock Exchange, which is at 20 Broad Street, easily four miles to the south. In the next shot they're walking past Radio City Music Hall, on 6th Avenue and 50th Street. That's roughly a half-mile NORTH of the Library. I know stuff got shook up in the nuclear blast, but that's a bit much... (00:40:30 - 00:51:00)
Continuity mistake: When Taylor and Brent fight in the cell, just before Taylor jumps on Brent, we can see nothing on the floor behind Brent. Then as Brent gets jumped on, some blood has appeared on the floor out of nowhere. (01:17:25)
Revealing mistake: When Nova says "Taylor" whilst Taylor and Brent are killing each other, Ongaro turns around and Taylor goes to punch him. Taylor's punch completely misses Ongaro, but Ongaro still reacts anyway. (01:18:45)
Chosen answer: The mutated humans (the ones with the bomb) have telekinetic powers and projected the image into Taylor's mind, the same way they did with the fire with the apes.
Bishop73