Factual error: The film takes place in Illinois on Halloween, October 31st, but you'd never know it by looking at the colors of the trees, they all have green leaves and there is almost no sign of Fall or ground leaves.

Continuity: When Loomis thinks he sees Michael but it is actually a drunk Ben Tramer in a mask, he runs after Tramer and pulls his gun. Brackett sees this and runs out of his patrol car, slams the door, and stops Loomis before Loomis gets off a shot. A few seconds later though, the car door is now open in the background.

Factual error: When Michael corners Laurie in the elevator, the door shuts just in time and slams on his hand and just keeps closing, and Michael pulls away. Elevators have rubber guards that would cause the door to open again if someone's hand would get caught in the closing.

Audio problem: In the climactic scene in the operating room, Laurie says "Michael, stop!" before shooting him, but her mouth doesn't seem to move.

Continuity: When Pamela Susan Shoop is being killed by Michael in the spa, the towel is tied arround her upper chest, then the towel falls down, revealing her breasts. In the next shot a split second later the towel is back up at he upper chest.

Continuity: In the scene where the boys ask Mr. Hunt about Ben Tramer, Mr. Hunt says that "it's just a little past 11." Following this up in the next scene Bud lures Karen into the room to kiss her and wish her Happy Halloween. During this scene, as Bud reaches up to kiss Karen, his watch is clearly visible and shows the time as 1:00.

Continuity: When nurse Karen first enters the hospital and changes into her uniform, she's clearly shown putting on a dark belt (either black or brown). However, in her next scene with Mrs. Alves, as well as the scene where she's tricked into entering the hospital room to fool around with Bud, the belt is white.

Continuity: When Michael falls off the balcony, he falls into some green grass and a garden is next to him. Yet in the original "Halloween", Michael falls onto the ground with barely any grass around him, just a dirt patch and no garden in sight. (This is explained because they reshot the ending to "Halloween" 1.).

Continuity: When Laurie leaves the hospital, she exits out of the hospital doors. Somehow the doors stay open. Later on in the far away shot, the doors are closed, then they are open again in the next shot.

Factual error: The story is supposed to take place on Halloween 1978, but some of the clothing and hairstyles have noticeable characteristics associated with the early 1980's; particularly those of Alice, Karen, and Darcy.

Continuity: When Michael stabs Loomis with the scalpel, Loomis drops his gun, yet when the camera changes we see Loomis fall back with the gun still in his hands.

Factual error: The balcony from which Michael Myers falls from in Halloween 2 is different than the original Halloween. You can clearly see a canopy over-hanging the balcony in the original, but in Halloween 2 the canopy is missing. It appears that Michael's body falls and lands in two completely different areas between the two movies.

Continuity: Towards the end of the film, when Dr. Loomis finally finds out Michael is at the hospital and orders the trooper's car to turn around. As the car turns around, the lighting outside appears to be pre-dawn however they arrive at hospital and it is still pitch black.

Continuity: When Michael stabs Nurse Jill in the back with the scalpel and lifts her off the ground, her shoes fall to the floor. A few seconds later, they are rearranged differently on the floor.

Continuity: At the beginning of the movie, the front door lights on the Doyle house are on, then off, then on again in just a few different shots.

Continuity: In the first scene when Loomis has just shot Michael. In first film, Loomis looks over the balcony and see that he is gone, but now he goes out and discovers that he is gone.

Continuity: At the end of the film, when Michael Myers is on fire walking out of the room in the hospital towards Laurie one can see that he is wearing gloves (probably so the actor will not be burned), but during the course of the entire movie, Michael Myers' hands are always visible.

Continuity: In the original film, the pumpkin at the Wallace's house was very small and fat, but in this film (which takes place the same night) you can see when all the cops and reporters are at the house that the pumpkin changed in size and the face is different as well.

Continuity: After getting out of the car, Laurie is on the ground beside Jimmy's car outside the hospital when she sees the Marshall's car pull up. When Loomis tells the Marshall he ought to handcuff him to the wheel, if you look, Jimmy's car is still visible in the distance, but Laurie is not in that shot.

Continuity: When Michael walks into the old couple's house, NIGHT OF THE LIVING DEAD is showing on the television. At that point, the film is just beginning, with Barbara and Johnny first pulling up to the cemetery. Much later in the film, the security guard is also watching NIGHT OF THE LIVING DEAD on television, and it's the scene where the cemetery zombie is attacking Barbara in her car. This is no more than ten minutes later in NOTLD, yet it's way more than ten minutes later in the evening of HALLOWEEN II.