Continuity: In the very first scene we see Ann Archer pulling down a shade from afar with the curtains pulled to the side. Then we switch to her inside the apartment and see the curtains are already closed.

Continuity: The water level was almost but not quite overflowing the brim of the tub when Michael Douglas is pushed in, and the faucet was still running, so there should have been more water on the floor.

Continuity: Quincy is sleeping on the little girl and keeps changing positions on her lap.

Continuity: The part in Stuart Pankin's hair keeps changing in the party scene.

Visible crew/equipment: When the family leaves their apartment building you can see the reflection of a boom mike in the right door.

Revealing: In the final confrontation scene Glenn Close comes out of the bath tub and raises her arm, the scene cuts to the gun and when it returns to Glenn Close you can see the fabric of her dress has changed to a thicker one to accommodate and cover the squib needed for her gunshot wound.

Continuity: During the scene where Ann Archer is driving around looking for her daughter she passes a house with a Santa and reindeer in it's yard. This seems out of place as it does not appear to be Christmas time, unless it is someone who leaves their decorations up all year.

Continuity: Playland, Rye NY in the spring, summer and autumn. Alex and the girl walking to the Dragon Coaster. It's spring with the leaves in bloom. Then in stock footage of a different roller coaster being pulled to the top, it's fall with the leaves a golden yellow. Then in other stock footage, the trees are a lush summery green.

Visible crew/equipment: When Michael Douglas goes to the police for the first time, after he gets the tape, when he is talking to the policeman watch for the reflection of the boom mike to the right of the cop's head in the trophy plate. It's beautiful and in every shot.

Visible crew/equipment: When Michael Douglas leaves the car rental there is a guy across the street behind a bus conspicuously watching everything. 01:15:45.

Continuity: When Michael Douglas is listening to Alex's tape it's midday when he enters the East River Drive underpass and comes out the sun has clearly set. Alex's tape doesn't skip a beat.

Visible crew/equipment: A shadow moves to the left of the refrigerator when Glenn Close says "I'm pregnant I'm gonna have our child." Michael Douglas doesn't move out of his position yet.

Continuity: (DVD only) In the new ending, when Alex attacks Beth at the family's home, Beth has bruises and a cast on her arm, obviously a result of the accident she was in a few days ago. In the original ending, presumably taking place within the same time frame, when the cops come to question Dan about Alex's death, Beth is fine - no bruises, no cast, she doesn't even look tired.

Continuity: Early in the movie, there is a black clock on the wall in Dan's kitchen that reads 7:50. Later, when he is in Alex's apartment strangling her, the same black clock is now in her apartment and it, too, reads 7:50.

Revealing: When Michael Douglas is listening to the "deposition" in his study, look closely at the background window. You can see Ann 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: When Glenn Close calls Michael Douglas in the middle of the night, his clock radio reads 2:13. In the next shot, without him touching it, the clock is dimmer and has been moved so we can't see the new time. Then about a minute later, the clock radio reads 2:20.

Visible crew/equipment: While Michael Douglas is listening to the tape in the attic there is a reflection in the window of someone who looks to have long blonde hair, just above and slightly to the right of the lamp.

Continuity: When the phone rings as Beth paints, Beth puts her roller in the tray and goes to answer the phone. When she returns the roller is in a different position than it was before.

Continuity: In the famous bathtub scenes there's a close-up of Alex's feet with blood dripping on her right foot. Later when we see her in the tub the blood is in a different spot on her foot.

Continuity: After Glen Close kicks Michael Douglas out of her apartment he's standing next to her bicycle holding his stuff. It can be assumed that he put the stuff on the bicycle seat because in the next shot his hands and the handlebars are empty. But later as we see him getting ready to leave again his stuff is the on handlebars.