Continuity mistake: In the beginning, Michael Douglas tells Glenn Close that he has a 6 year old daughter. Later in the movie when Douglas is talking to his wife on the phone about the daughter missing school, she says "She's 5 years old, what is she gonna miss, Trigonometry?"
Visible crew/equipment: The boom mic is visible in the top corner of the Volvo's windshield, when Michael Douglas waves goodbye to his daughter on the street at the beginning.
Continuity mistake: While in his first meal with Alex, Dan's collar swaps from being outside to inside his jacket.
Other mistake: After Dan visits his wife in the hospital, he goes to Alex's apartment. In the scene where he's chasing Alex and crashes into the glass door, shattering it, look closely at his face and you'll see it's not Michael Douglas but a stunt double. A few seconds later when they are struggling in the kitchen, look again and you'll see the same stunt double.
Continuity mistake: When Michael Douglas puts on Glenn Close's tape in the rental car, the radio is set at 97.1. When he removes the tape, it's at 107.9.
Continuity mistake: While Dan [Michael Douglas] is listening to the Alex's [Glenn Close] tape in his car, Alex is following him in her car. They both have to drive through a toll gate and slow down so as to throw coins for the toll fee into a funnel. Observe Alex: As she is about to throw the coins, we see her in close up using her RIGHT hand. In the long shot, we see her LEFT hand depositing the payment.
Continuity mistake: In the last portion of the film, the background shows autumn-leafed trees when Anne Archer drives downtown. When the scene switches to the house, all the trees are lush and green in the yard.
Audio problem: The dialogue that Michael Douglas hears Glenn Close saying when he walks into his apartment to find Glenn Close talking to his wife is the exact same thing that she says just before she leaves when Ann Archer gives her their phone number.
Revealing mistake: When Michael Douglas is listening to the "deposition" in his study, look closely at the background window. You can see Anne Archer's reflection in the glass, together with someone else (probably crew), just waiting for her cue to come in and surprise her husband.
Continuity mistake: Iron Couple Award: Not necessarily a mistake, but Michael Douglas and Glenn Close start their frenzied lovemaking in the kitchen as a clock reads 4:45, and they're still going at it when the clock later reads 6:15.
Suggested correction: You're right, it isn't a mistake and shouldn't be listed as one. Some people can have sex for hours, you know.
Continuity mistake: There is a scene near the beginning shortly after Michael Douglas and Glenn Close meet. They go to a restaurant and get caught in a rain shower on the way. When they sit down, Michael Douglas is soaking wet. The shot changes from Michael to Glenn and then back to Michael - suddenly he is bone dry. Then the camera goes back to Glenn and then back to Michael and he's soaking wet again.
Continuity mistake: Alex takes the cigarettes out of her bag twice when she and Dan have lunch in the restaurant.
Continuity mistake: When it looks like Alex is dead in Dan's bath, she has a long strand of blood coming out of her mouth, but a second later it's gone, and her eyes, which were white, are no longer white - they are open and look like normal eyes.
Continuity mistake: When Michael Douglas is listening to a "deposition" (which is really Glenn Close calling him names, etc.) using his ear phones in his new attic home (just before his wife comes up and finds him), the audio tape is not the same one as he was listening to minutes before in the car! The words are almost the same but the inflections are different.
Suggested correction: It is the same tape, although a mistake does remain - the tape when first being played in the attic is a few sentences before where the tape should start (without him rewinding it at all).
Visible crew/equipment: In the library, right after Dan breaks into Alex's apartment, a cameraman's reflection is visible in a window as a librarian pushes a cart past it.
Continuity mistake: Dan plays the tape that Alex made in his car. He stops the tape when he gets home, and after he gives his daughter a pet rabbit, he goes to his den and puts the tape in the tape recorder and presses play - that's all; he doesn't rewind it - but what he hears is the same bit he heard in the car, which is wrong; the tape should have started play where it left off in the car.
Continuity mistake: The amount of blood on Dan's face, when Alex slits her wrist, keeps changing.
Continuity mistake: Fred Gwynne's pipe jumps from his hand to his mouth when he and Michael Douglas walk up the stairs to his office.
Continuity mistake: At the start of the film we are introduced to Michael Douglas' family life. His wife is in the bathroom getting ready for their night out, Michael is sat on the couch reading and his daughter, Ellen, is sat on the chair watching cartoons. In one shot Ellen is sat on her own, but in the next shot their dog has magically appeared on her lap.
Plot hole: In the kitchen, when Michael Douglas is preparing the hot water for the tea just before the final bathroom fight, there is a shot of him looking up at the ceiling and noticing the leaking water (obviously from the overflowing bathtub). But, he turns back toward the stove and continues to prepare the tea, instead of having an immediate reaction that something is wrong. It is not until the teapot whistles, and his wife screams, that he realizes something is wrong. He should have run up stairs as soon as he noticed the water leaking from the ceiling.
