* In ''Beneath the Planet of the Apes'' Taylor blows the whole planet up, due at least in part to the apes and the mutated men. But he's only seen a small portion of the planet! How does he know the rest of the world is like the area around what used to be New York City? (Bear in mind I'm bugged by the film; the original book establishes very well that the entire world is a ''planet'' of apes, not just a small area.)
** He was ''dying''. It was his last act of defiance to Dr. Zaius.
**** Charlton Heston has said that Taylor was merely reaching for Zaius and his dying hand fell on the trigger by coincidence. It's supposed to be ambiguous, but given Taylor apparent death wish following Nova's death, it can seem like he did it on purpose. Either way, the filmmakers' message that an endless cycle of war will lead to mankind's destruction is proven right whether we deliberately wipe ourselves out or do so inadvertently.
** Also remember, Nova had just been killed by an ape, so what's the point?
** Remember, ''TheWildBunch'' had just come out the previous year. Ending the movie with a BadAss but ultimately pointless bloodbath was a recurring theme during that period in film.
** How did Taylor and Brent know the bomb would destroy the world? It is clear they left Earth in the 1970's, a time when humanity clearly did not have the technology to build [[EarthShatteringKaboom bombs that could destroy a whole planet]], and as such would not recognize a bomb that could.
*** The bomb would still wipe out an important part of humanity's remnants, as well as the local ape civilization. As it's implied that the world is already seriously messed up from previous wars, this definitely insures things would go FromBadToWorse.
*** Actually, one of the properties of a thermonuclear weapon is that you can build one of arbitrarily large size with enough materials. Lithium deuteride and depleted uranium are completely stable unless and until they are exposed to the conditions of a nuclear explosion: 100 million degree temperatures combined with an enormous neutron flux. Once you trigger the secondary by detonating the pure fission device in the primary, the secondary will continue to burn until it either runs out of fuel or the pressure blows it apart. Tsar Bomba was built at over 50 megatons, and Tsar Bomba Class nuclear weapons can go as high as 100 megatons. If we can build a 100 megaton bomb, we can build a bomb of any size given enough material.
*** Humanity didn't (and still doesn't) have the technology to build functioning cryogenic chambers or spacecraft capable of relativistic speeds either, yet Taylor (and Brent, and later Burke and Virdon) began their missions in the late 1970's/early 1980's. The Apes universe appears to be an alternate timeline with more advanced technology, so who's to say what their weapons technology is or isn't capable of?
* 2001 version. Seriously, what the hell was up with the ending? So Earth is inhabited by apes now? Huh? Why is there [[strike: a Monkey]] '''[[IncrediblyLamePun Ape]]''' Lincoln?
** See the WMG for @/MacPhisto's explanation.
** They're counterparts. I wonder what Ape Lincoln did; Did he free an ape race from another?
*** The website claims that Thade simply went back in time using the other pod and started an ape revolution on Earth, freeing them from humans. That, of course, would cause the GrandfatherParadox. If humans never build the ''Oberon'', then it never crashes on the other planet, and Thade's ancestor Simos never establishes an ape society.
**** It would not create a GrandfatherParadox. Leo returned to Earth on October 26, 2155, while he left Saturn's orbit in the year 2029. The ape revolution could have happened in those 128 years.
***** Um... no it couldn't. At all. Did the Apes demolish the human statue of Lincoln and put an identical Ape one in its place? At the latest the Revolution must have took place by the mid 1800's.
** An even bigger question for the 2001 remake: the apes and the humans on an alien planet are easy to explain, as they survived the crash of the ''Oberon''. ''Where the hell did all those horses come from???''
*** Only two possible explantations. Either the alien planet just happened to have horse-like creatures on it...or the space station had, for whatever reason, experimental animals that included horses in addition to the experimental apes.
* The original: How did humans lose their ability to speak?
*** Presumably they're never taught how to speak. They just punished if they speak so most probably never even try, if they can comprehend that. If a human doesn't gain access to certain things, like speech, before a certain age that part of their brain gets "blocked" off.
*** That might work for captive-bred humans that are punished for vocalizing as children, although even those ought to learn to understand ''others''' speech by listening to their ape masters talk. It certainly wouldn't explain why humans living free in the wild would be unable to rediscover language.
*** Maybe at some point humans evolved not to speak due to a genetic bottleneck. Like a plague wiped humans that could speak, leaving only those who were mute who also had the immunity linked to the trait of muteness. This is the explanation given in one of the scripts for a Planet of the Apes remake. It's a bit of a stretch but this is Sci-Fi.
*** Human speak is not itself an evolutionary trait. The only evolutionary aspect of it is having a mind capable to relate specific sounds or symbols with concepts, reproduce them to convey the concepts in context-related circumstances, and develop as a society an unified code for all this. Vocal folds help, but if we had a brain and lacked them, language may have taken another form. Or not. A common mistake is to think of evolution in a deterministic way, as if intelligence ''had'' to lead to civilization, because in our case it did so. Whales and Dolphins are even more intelligent than humans and there is no whale civilization, humans left in the wild for generations may stay as savage animals and never recreate civilized traits again.
* The remake: Umm... if humans outnumber apes, can talk, and have opposable thumbs... why are the apes in charge again?
** They're ''Apes''. Strong, easily angered, ''sapient'' apes. Humans appeared to have lost their knowledge for weapons a long time ago, leaving them vulnerable.
** Do they really outnumber the apes? The prequel comics mention that most of the ''Oberon'' crew was killed in the crash. The survivors were forced to defend themselves against intelligent BigCreepyCrawlies, so they enhanced the apes. That [[TurnedAgainstTheirMasters didn't turn out well]].
** But why do the apes treat humans like animals? In the original movie it made sense, since humans had ape-like intelligence, but in the remake they are sentient beings, they can talk and think and so on. If they consider the humans inferior, they can just make them inferior-class citizens. Enslaving them makes sense; treating them like non-sentient beings doesn't.
* This is certainly a headscratcher for me: as we all know the events of the first two movies take place in [[AfterTheEnd post apocalyptic New York]], however, ''Escape From the Planet of the Apes'' takes place in Los Angeles and it appears that ''Conquest...'' and ''Battle...'' take place in the remains of a Southern California city as well, possibly future Los Angeles. The implication in ''Battle...'' is the ape village being constructed will eventually become Ape City from the first two movies. How is this possible, considering New York and Los Angeles are 3,000 miles apart?
** On that note, how did the topography of the [former] NYC area change to look like [[CaliforniaDoubling Southern California cliffs]]? C'mon, an atomic bomb can't do ''that'', no matter how much you worship it.
** ''Conquest'' was filmed in LA, but the location legend at the beginning of the movie only says that it takes place in "North America". Since Armando is the head of a travelling circus, it isn't too far-fetched to assume that they are in New York or in some nearby city.
* How would a single talking chimp with no concept of modern technology set up an ape revolution, considering this would require ''genetically-engineered'' apes, which we only saw on the ''Oberon''. The originals actually make it clear that apes are everywhere thanks to all the other pets dying out. The remake doesn't mention anything like that.
** Moreover, why would a future space mission bring a bunch of apes along in the first place? Even if they're genetically-engineered to be smarter, there's nothing they can do that a robotic drone couldn't, and the latter wouldn't be a drain on the ''Oberon'''s life-support facilities. The only reason apes were ever sent into space in the first place was to confirm that anthropoid brains would still function in space; once they knew it was safe enough for humans, orbital bio-research switched to smaller organisms that were lightweight, harmless, and easy to maintain.
* As there didn't seem to be any sentient gibbons or siamangs running around in this franchise, shouldn't it be called Planet of the ''Great'' Apes?
* Apes make ''terrible'' pets: dangerous, destructive, unmanageable and expensive. Yet the original films had them as replacements for dogs and cats. Does that mean that rabbits, ferrets, parakeets, hamsters, and all the other animals that were vastly more suited to be pets also died out? Bloody selective plague, if so, considering that horses and humans both survived.
** The only explanation that might have explained this, and I stress *might*, is if the movie would have suggested the apes in ''Conquest...'' had been genetically altered to be a slave race as opposed to just being normal apes that had been trained. This too would have explained why all the apes were now humanoid in appearance.
* In ''Planet of the Apes'', it's made pretty clear that knowledge of the past prior to the Lawgiver has been suppressed. So how does Cornelius know about the story of Aldo saying "no" to his human masters in ''Escape''?
** Because it's stated somewhere that as an archaeologist, Cornelius had access to scrolls that were kept from the rest of the population.
** A better question is why does Cornelius say that Aldo's defiance against his human captors is celebrated in his time, when in the previous films the apes treated the sheer idea that humans were sapient as blasphemous?
*** Maybe the story of Aldo was just a story, and interpreted as such. Like "A long time ago, there was a magical kingdom of talking humans, and these talking humans kept apes as pets and enslaved them, much like what we do with humans today. Then one day an ape named Aldo said 'No.' " It's only when Cornelius meets Taylor and goes back in time does he realize the story of Aldo was based on actual events. In the case of the orangatans, it is clear that they knew all about the true history, and were working to keep it secret, and so any evidence of humans talking is considered blasphemous. Gorillas of course, don't need to think about these things, and so it's easy for them to believe that all humans are dumb and have always been dumb.
* Where is that Statue of Liberty? It looks like it's washed up on the north side of somewhere but its facing South. Did it float over to Manhattan and flip around?
** The coast changed during the millenia, the statue (semi)collapsed and the remainder was buried in new sediment. This is not that strange: there are many cities in the Mediterranean that had ports in Roman times or before, and now are landlocked.
** The nukes probably also altered Earth's axial tilt and produced other climate changes. East Coast climate now resembles a hot and dry West Coast climate.
* In the first film, it is noted that while the astronauts have been away from Earth for centuries due to time dilation (Charlton Heston's character even notes that the men who sent him on the voyage are now dead). But in the third film, the President says that Taylor's ship has been missing for two years, as though he were expecting it to return within his own lifetime. What's going on?
** Funny thing about relativistic acceleration: it produces a one-way event horizon behind you. If you accelerate at 1 g away from Earth space, after one year you will no longer be able to ever receive signals from Earth (until you stop accelerating away from Earth), but Earth will still be able to receive signals from you, albeit greatly redshifted. It is, of course, possible to redshift a signal so great that our receivers can't detect it. Evidently, the President was surprised that the ship hadn't checked in in two years.
* What the hell was the mission objective? 700 years traveling over 99% the speed of light. Where the heck were they going and what did they EXPECT to find when they got back?
** From the best I can figure it was supposed to be a one-way exploration trip and would involve one woman and three men setting up a new life in space...and the woman died in the flight. Yeah, I don't think you could set up a self-supporting Earth colony with a gene pool like that. And if it was planned as a one-way trip, it doesn't really make sense for Brent to be on a rescue mission.
* Why is the doll such condemning proof? Humans make ape toys that talk after all.
** The idea is not that they can't do it, but that they wouldn't do it. We can make ape toys that talk, because for us the idea of intelligent and civilized apes is fictional but not blasphemous