Directed by: Paul W.S. Anderson
Starring: Laurence Fishburne, Sam Neill, Jason Isaacs, Joely Richardson, Kathleen Quinlan
Revealing mistake: In the scene where Sam Neill has set the bomb to blow up the rescue ship, Laurence Fishburne comes running up to the sealed door of the Event Horizon whereupon it shakes back and forth like a stage door would.
Revealing mistake: During the opening scene, when the camera is starting to zoom in on the ship outside earth's atmosphere - the view of the crew inside zooms in quicker than the camera moving in to zoom into the cockpit.
Continuity mistake: Throughout the entire movie the size of the Event Horizon's interior versus that of its exterior is repeatedly off. Evidence of this is seen mostly with scenes that take place in the main access corridor. First off, it is made to seem that the ship has one central connecting tube, but in the exterior shots there are several tubes that make up the middle of the ship. This is pointed out when Miller is making his way across the ship to get to the air lock that Justin is about to open. Second, the length of the tube (heck even the whole ship) is too small in relation to how the ship appears from the outside. This is pointed out in a few different places in the movie - when the crew is up on bridge, then race all the way to the airlock in the middle of the main access corridor, where Justin has just closed the inner door and when the doctor is asked to go grab his med kit from medical, which is across the ship and he is gone only a few seconds, and also when Miller is running though the corridor to activate the explosive charges. Since the ship has no faster means of transportation, such as turbolifts or a tram system, they could not be covering the distance they appear to be covering in the movie.
Miller: Vacate! I want off this ship.
Dr. Weir: You can't leave. She won't let you.
Miller: You just get your gear and get back on the Lewis and Clark, Doctor, or you'll find yourself walkin' home.
Dr. Weir: I am home.
Trivia: The Event Horizon was designed to have features subtly reminiscent of the famous Notre-Dame Cathedral.
Question: Why did the Event Horizon choose to come back after seven years? In fact, why come back at all?
Answer: With the recent Event Horizon prequel comic, it is established that Event Horizon is not in the Warhammer universe and there is a king of hell in the film. His name is Paimon.
Chosen answer: The movie never explicitly says; but science is as yet unsure what happens to a given piece of matter once it crosses a black hole's event horizon, so who knows? The ship could have been thrown seven years forward in time, or far enough away that it took seven years for it to drift close to Neptune. Pick any explanation you like.
The theory that the film is a stealth prequel to the 'Warhammer 40,000' universe has been confirmed by one of the writers, who was a big fan of 40K and said that the setting influenced his writing "either consciously or subconsciously" – because Games Workshop is litigious. But since the Horizon entered into the Warp, time there flows extremely differently from time in real space; while it was seven years for people in real space, it could have been seconds, or thousands of years, for the ship.