Continuity mistake: When the couple from Ohio is in the back of the squad car, the cop says that there is a hold up at a liquor store. When they get there, the store is clearly closed.
Continuity mistake: When Jack Lemmon and his wife Sandy Dennis are driving in their car on the way to the airport, you see a very different scene out of their rear window than you see when they show the outside of their car.
Continuity mistake: After just missing the first train, and then finding out that they may be able to take a taxi to catch it further down the line, George runs back into the terminal to find Gwen, who had gone to the ladies' room. As he's asking the cleaning woman where the ladies' room is, there is a woman visible in the background, putting on her coat and starting to walk away from the rest room. In the same shot, George runs to the ladies' room to retrieve Gwen and actually passes the woman as she is walking toward the camera. In the next shot, as George reaches the ladies' room door, the woman is back where she started from, and is again putting on her coat.
Visible crew/equipment: In the shot in central park a microphone from the crew appears in the top right hand corner of the screen as the couple are walking along. Spotted in a video version of the film.
Continuity mistake: When George and his wife try to get back their room at the New York hotel with no success, they meet a man named Murray, who offers to take them to the Hotel Ashmount, two blocks away. When Murray agrees to show them where the hotel is, he says that it's only one block away.
Visible crew/equipment: Near the end, after having been kicked out of the church, George walks out into the street and goes into a tirade. Meanwhile, In the background to the left, a crew member with sunglasses is visible standing in the street, obviously to direct the extras on the sidewalk. He tries to move out of the scene while communicating with someone off camera, then motions for the extras to cross the street, after which two ladies, who had been standing waiting for the signal, immediately start walking.
Revealing mistake: In the beginning of the movie, as the couple are driving to the airport, they pass two cars, which are parked together along the side of the road. The drivers are both standing beside their cars and obviously observing and taking pictures of the action / actors as they pass by.
