Other mistake: Captain Willard inquires from two soldiers manning a machine gun, "Who's the commanding officer here?" The two can't kill the enemies "out there by the wire" so they ask their friend "Roach" for some help. As "Roach" walks over he turns off a tape recorder playing some Jimmy Hendrix riffs. If you look closely at the buttons of the tape recorder, it was never on in the first place. (01:45:50)
Other mistake: The scene where the British army is crossing the Buffalo River is in the historic place but they are crossing in the wrong direction.
Other mistake: In the scene where an unemployed Ted Kramer character is in the offices of another advertising firm negotiating with two executives for a job, he tells them he will take a pay cut if they hire him but that this is a one-time offer. The executives are reluctant to make a decision because supposedly, it is Friday at 4:30 p.m., the weekend before Christmas. However, the shot through the window behind where Ted is sitting shows a bright and sunny New York City, probably at high noon since there are no building shadows. If it were really 4:30 p.m., the city would obviously be much darker, particularly in late December. Also, given the greenery that can be seen, it is probably not even winter.
Other mistake: When Larry Crocket runs out of the house in his underwear and gets attacked by Barlow, later when the police find him his clothes are in the car. How is that possible when he ran out of the house with his clothes still inside?
Other mistake: When George is in the basement, his son starts walking down the stairs. Suddenly a light bulb shatters right next to the boy's head, he screams, and falls violently down the stairs. But when it cuts to George coming over, he's just walking at a normal pace as though nothing happened. (This is just after they move in, before the evil spirits take hold of George, so there's no reason for him not to be alarmed.).
Other mistake: The Rogues stop to make a phone call at a candy store. The meeting in the Bronx was at midnight so it's got to be 2 or 3am. What on earth is a candy store with a little girl working there doing open at that time with nobody on the streets?
Other mistake: The Onion Field is a true story about a cop who who is murdered on March 9, 1963. In the film prior to the murder one of the suspects is shown watching General Hospital on TV. GH didn't debut until April 1 1963, that almost a month after the murder happened. (00:20:55)
Other mistake: Lauren Tewes' character is credited as "Jessie", but the name tag on her waitress outfit says "Jesse." (00:17:00)
Other mistake: In the scene where Frank Morris first starts to dig using the nail clipper, he stands up in his cell, turns off the light then bends down to start digging, however the only light coming into the cell would be on his right, but the shadows from his head and bars appear to be from a light directly behind him.