Plot hole: The facehuggers "see" by reading body heat, but this contradicts nearly every other film in which the creatures appear. In the original film they can see Kane's face through a space suit and helmet, so it must be tracking more than just body heat. The creatures also routinely leap directly at their victim's faces. This suggests that they "see" facial detail in some way that goes beyond simply reading body heat. The protagonists should not be completely invisible just by hiding their body heat.
Suggested correction: The thorax and chest cavity is the warmest part of the body. It's tracking the heat from your breath and see's it as an opening down to the chest cavity. Which is why it always latches onto the face. It helps when the victim screams too. More heat.
It can't read Kane's body heat through a space suit, and his breath isn't escaping from his helmet at his mouth. It leaps directly at his face and melts through the helmet to get where it needs to go. The intent in the original film is that the creatures can see, not just read body heat. Additionally, we see from the xenomorph perspective in Alien 3 and Alien Covenant and their vision is not based on body heat. The heroes are invisible here just by raising room temperature.
Where has it ever been stated that they can't read Kane's body heat through a space suit? They're literally showing you it can. That's not a mistake of the movie. Alien 3 happened after this movie. Alien Covenant's praetomorph was created by David. So not the same situation as this. This is also someone speculating based off observation and study vs. A camera trick of showing their actual vision in events that haven't happened yet or on another planet. So they could be wrong.
It's a space suit, they are insulated. That's why when you wear a space suit the lack of atmosphere doesn't kill you. There's no possible way creatures that only see heat could see a human through a space suit. That's a mistake for THIS movie and this movie alone because this is the only instance where heat vision is suggested. The fact that earlier released films take place later in the mythos doesn't really change anything, this film makes a claim unsupported by the other films.
There was wind and ice on that planet. That constitutes an atmosphere. Kane is in a giant helmet, leaning fully over the egg opening as it hatched. That was pretty much the only place it could go. Just because the suit is insulated from the cold atmosphere on the outside, doesn't mean the suit itself can't get hot from the heat inside. Also, these are aliens, I never get trying to apply human logic to a fictional being from another planet, in the future, that survives in an atmosphere we can't.
There is some atmosphere on LV-426, but that is entirely missing the point. The space suit is designed to be worn in no atmosphere, so it is insulated. Space is incredibly cold; if your body heat could be drawn to the surface of a space suit, you would freeze to death in minutes while wearing one in space. You can't read someone's body heat through a space suit. I am not trying to apply "human logic" to an alien; I am saying this film contradicts the others. Thus, it is a plot hole.
You're missing the point. Kane leaned over the opening in a giant helmet, inches from the creature. Where else was the facehugger going to jump to? You keep saying, "you can't read someone's body heat"; that's based off current human knowledge and our abilities, not the abilities of a fictional alien creature who lives in the cold reaches of space. You can't say what it can or cannot do when it is showing you that it can.
We can absolutely say what the creature can and can't do based on what has been shown countless times throughout 40-plus years of canon media. This film makes a claim to create a tense scene. That scene contradicts what we know about the creatures. There has never been any indication that they see based on heat, and implying that they do does not follow how we see them behaving in basically every other appearance. Them "showing us that it can" is the mistake; that's, by definition, a plot hole.
Why do you refuse to answer my question? Kane leaned over the opening in a giant helmet, inches from the creature. Where else was the facehugger going to jump to?
To answer your question: How does it know anything is even there? They see by heat, and the characters in this film are invisible just by raising room temperature. It shouldn't know that Kane is even in the room. So where else should it have jumped? Nowhere; he should be invisible according to this film. It shouldn't have jumped at all.
Suggested correction: Someone in a spacesuit has the problem of excess body heat; the suit needs to dissipate the excess heat from the body, as it insulates the body against the vacuum of space. In real life, space suits are attached with tubes that dissipate the body heat when the astronaut is on a spacewalk; the suit has a cooling system for this. But Kane didn't have tubes to dissipate his body heat with, so where does his body heat go? Why not the helmet?
That's speculation, not really a correction. It's a space suit; that much is clear. It doesn't have a visible cooling system like a real-life space suit, but this series takes place in the distant future. We're getting a little hung up on this one example, but honestly, these films are 40-plus years apart. There are dozens of other instances where it is clear the facehuggers and the xenomorphs can see more than just body heat.
The xenomorphs can definitely see more than just heat, but that's not the statement in the movie. I can think of no examples that show facehuggers can see anything more than just heat/infrared.
Plot hole: Towards the end of the film when Private Shakespeare is talking to the wounded soldier, his coat and hair are suddenly dry, strange when the majority of the film is set outdoors in the rain.
Plot hole: Travis does the last time jump to change the events of a previous time jump. As all the jumps were to the exact same time to kill the same dinosaur, the travelers of the second jump must have found there the travelers of the first one. The travelers of the third jump must have found the travelers of the second and the first, and so on.
Plot hole: How would any of the EVA/16MM video footage be recovered in the first place? Astronauts took pictures like these on rolls of film, and those were developed well after the end of the flight. If the spacecraft had not been recovered at all, then the footage would simply be a piece of orbiting space junk. (01:22:40)
Plot hole: According to the detective at the end Walter believes Ray kidnapped his dog, assuming he saw the note that Ray put in Walter's mail slot. But if that note was grabbed along with Walter's mail and the wig it would have burned up along with everything else when the house exploded. So how did Walter know that Ray had his dog?
Plot hole: Within only a few days, cults have formed looking for fertile women? Not remotely likely.
Suggested correction: Exactly how is this not remotely likely in a fictitious horror film involving an outbreak situation (and state of emergency) that has never happened before. It's not a plot hole when irrational, terrified, or crazy people do irrational, terrifying, crazy things.
The plot hole is spot on, no way does society break down in total anarchy in just a few days, you're basically saying all law enforcement and military agencies will somehow cease to exist.
Not cease to exist, but certainly have other things to do than investigate a few random cults. Who'd to say they'd even know these cults have formed?
Plot hole: Karen forbids her son from playing with Chucky, because he's spending too much time with it on top of it scaring the cat, and locks it up in a cabinet. The cabinet ends up broken (Chucky broke it but she does not know), the cat conveniently disappears (Chucky killed it but she does not know), but the mother is totally cool about it, the plot point is forgotten and Andy faces no punishment or questioning for it. Any mother would be alarmed and would make a big deal of it possibly even throwing the doll away (she does not care, she did not pay for it), but that sort of drama is delayed until much later in the movie, for no internal reason.
Plot hole: Freddy is killed at the end because he sees his own reflection in a mirror, which causes the souls in his body to revolt and kill him. But this weakness to mirrors and reflections doesn't fit in any other film of the series. He repeatedly appears in mirrors in the other films, and in the climax of "Dream Warriors," he even appears in a hallway of mirrors that are facing each other, where he would have seen his own reflection multiple times. No matter how you slice it, his death in this movie doesn't add up in the overall context of the series.
Plot hole: The movie establishes the narrative that megalodons have been locked beneath a layer of hydrogen-sulfide and that the first sub to penetrate that layer is their own research sub, thus allowing the megalodon to escape the hydrogen-sulfide layer for the first time in modern history. So, how could there be a megalodon present to at the very beginning of the movie, which interfered with the protagonist's rescue efforts?
Plot hole: When Sid shoots the TV-show host, the number of viewers doubles in two seconds. How would all those people find out so fast and switch channels?
Plot hole: There's no way Dr. Lynn Waldheim's coat would have fitted Carter.
Plot hole: When the old women are painting the eggs, you can see them blowing the yolk out of some. Why didn't they blow the yolk out of the Critter eggs?
Plot hole: When James and Gemma arrive back at the waxwork just before the film's climax, they claim a "man with a high-pitched voice" (Hans) invited them. In the earlier scene when they decided to not enter the waxwork, they left before Hans answered the door, and he couldn't have found their phone numbers anyway.
Plot hole: In the hospital scene at the end, why does Hicks run in and push Gale out of the way? She had no way of knowing someone was holding a gun on her and was about to be shot, as far as Hicks knew Gale was just standing there talking to someone. (01:40:00)
Plot hole: When Becky falls asleep she is awakened by Miles and has now become an alien, However she should have died and her essence should have been in one of the pods. There were none nearby.
Plot hole: The truck was in front of all of them when they turned on with the green light, but it passes them when they are stuck with the red truck. So the crash happens moments past the light, so they would all be way past that point on the interstate.
Plot hole: When Abby and her kids are abducted, the sheriff is sitting right outside her house and sees this happening. Yet the video didn't record. Well the sheriff saw it all with his own eyes so why wouldn't his testimony hold up? The tape actually shows the UFO so there's proof right there. (01:08:55)