Plot hole: When Freddy takes over Jesse's body at the party, there are several people watching through the patio doors when he confronts Lisa. None of these people ever make a sound, even when they see Lisa have a knife fight with a horribly disfigured man with long knives coming out of his fingers. The other party goers are completely oblivious to Freddy's presence until he comes jumping through the glass doors.
Plot hole: In the cafe scene after the fingerprints have been identified as belonging to someone who was thought to have been killed, Jean Reno tells Vincent Cassel that the person who shot at him had all ten fingers. How did he know that? The audience only sees one hand which is holding the pistol and the other hand is out of sight.
Plot hole: After Noah stabs Lucius, Ivy is brought to see Noah who is locked up in the "quiet room". As they leave, the lock is being placed on the latch to lock Noah in, and soon after the door is rattling, presumably Noah in an attempt to open it. If you look closely, you can see that the rattling occurs because the door lock is locked and not because of the lock on the latch. Quite strange, as we clearly see the lock placed on the latch right after the door is closed. There could not possibly have been time for the door lock to be locked with a key.
Plot hole: Could Howie have not telephoned for more officers? When Howie first walks into Summerisle you can see poles that are used to carry telephone lines. Later on you see outside The Post Office (May Morrison's shop) a box that is used an exchange box for telephone lines in the town. The story gives us the belief that there were no telephones on Summerisle, which is why Howie was unable to send for help. But there is clear evidence of a telephone network on the island. Even if the islanders somehow manage to prevent him making a call, what about the radio on the plane?
Plot hole: Enola and Tewkesbury make an unpremeditated decision to visit the Basilwether estate. This decision was made on the spur of the moment, and no-one knew about it. but when they arrive, Linthorn, who is supposed to be in London looking for Tewkesbury, is waiting in ambush to kill them. (01:32:45 - 01:34:31)
Plot hole: When Jason is in Ginny's cabin, she's under the bed seeing where he's at. So how did Jason manage to get up on a chair and wait for her to come out without her seeing him do this? She had to see him do that, but when she pokes her head out, she's surprised to see him there.
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 police let Norman back to his house on the same night multiple murders happened. He is even allowed into the fruit cellar, where most of them happened. (01:38:25)
Plot hole: Darby goes to great pains to get out of the country, to where no one will know where she is but Grantham. But upon reaching her "secret" destination, a van pulls up to the plane and a man gets out and hands them an envelope with a copy of the front page of the Washington Hearld with their breaking story and both their names as by-lines. That couldn't happen unless other people besides Grantham and the pilots knew her destination.
Plot hole: During David Leigh's narrative about Jim's court case, you are shown a number of newspaper headlines concerning the murders. One shows a shot of Locus looking at camera, with the caption 'Did Locus see his killer?' That shot was on the missing film which was found by David Leigh AFTER the murders were forgotten. So how did the paper get the picture?
Plot hole: Andy is interrogated by the detective after the latest rape, as evidence in this one points to him. Problem is, the cop mentions that all the victims had visited Andy's office before their attacks. In real life, with information like that, he would have been a suspect and subject to questioning from the very first incident.
Plot hole: Towards the end, Patrick takes the 5kt bomb into a helicopter and climbs it away to safety. The problem with that is that the helicopters have a rather low rate of climb - ~10 m/s for military helicopters, less than that for civilian ones. This is the rate of climb at low altitudes, and it is with altitude. He had less than 5 minutes to climb, which would put the bomb at most 3000 meters above the city, and more realistically, one tenth that - just about the optimum height for the bomb to inflict major damage on the Vatican city and the center of Rome.
Plot hole: Holmes asks what had frightened Sir Charles enough to make him run away from the house. But when Dr. Mortimer described the scene, he only mentioned that at one point the prints did not show heel imprints. It is an easy deduction that sir Charles had been running, but the doctor did not say anything about the direction of the footprints.