Continuity: Christine spills wine on herself and Nicholas, but it soon disappears from her shirt.
Continuity: At the airport, Nicholas gets ink on his shirt. When trying to clean it, it's a different shirt.
Revealing mistakes: Nicholas Van Orten's birthday is in October, but in one of the scenes as the car goes by a Hallmark Store it clearly is advertising "FATHER'S DAY" (which is in June).
Continuity: When the detective guy follows Nicholas from the hotel, you can sometimes see two people in the car.
Revealing mistakes: When Van Orton and 'Christine' leave from his office in separate taxis, Christine's cab stops just off-camera - the reflection of the breaking lights from the cab can clearly be seen in the bumper of the remaining taxi.
Continuity: When Nicholas visits his ex wife, he has a band-aid on his nose. In the restaurant the band-aid is gone, only to reappear at the zoo.
Audio/visual unsynchronized: Nicholas' lips don't move when he apologizes to Christine after everyone runs away at the fake hospital.
Continuity: When Nicolas is watching the film strip, he gets fed up and stands. He looks back and clearly is standing in the way of the film's projection onto the screen, but when the screen is shown there is no shadow.
Continuity: A tiger in the background disappears between shots at the zoo.
Audio/visual unsynchronized: Christine's lips are not moving when she delivers one of her lines as she discusses the possible consequences of the "Game" with Nicholas in the car.
Revealing mistakes: During the in-car shots in the sequence where Nicolas is being followed by the P.I., the speedometer of the BMW stays at zero.
Factual errors: In the end credits, rigging grip Michael Santoro's name is spelled "Micheal".
Errors made by characters (possibly deliberate errors by the filmmakers): The sign on the gate to Nicholas Van Orton's house says for auction due to "forclosure" - should be spelled "foreclosure".
Continuity: When Ilsa enters the study when Orton is talking to his TV, the TV reverts back to the news twice - once in the close-up and again in the wide-shot from the door.
Continuity: Nicholas confronts one of CRS's employees at the Zoo trying to find out who is in charge. The employee tells him "This is extremely dangerous." Nicholas replies, "No you don't understand *I'm* extremely dangerous." at which point you can clearly hear his gun being cocked. He then puts the gun to the employee's neck but the gun is not cocked.
Errors made by characters (possibly deliberate errors by the filmmakers): When Nicholas is playing squash, at the end of the sequence he skillfully 'catches' the ball. It is clearly visible, however, tha he missed the ball.