Corrected entry: In the scene where the killer and the father fight by the dock, you can see graffiti in the background. The tag name "Ness" is a name that is seen often in the New York area today, not in 1969.
Corrected entry: In the scene where Dennis Quaid by accident sets the desk on fire, we see how the burn mark appears on the desk in 1999. But why is it still hot and smoking 30 years after? Same goes for the writing with the soldering iron. In comparison, the wallet has got signs of being 30 years old when the son finds it.
Corrected entry: When Frank is taken to the police station for questioning they show John reading a newspaper that says the fireman is a suspect but everything else in the movie happens on that same day in 1969, so headlines would not have the fireman as a suspect if the police now know about the cop, since the "souvenirs"were found in his apartment by Frank and the 1969 police.
Corrected entry: In the scene when the fuel tanker is crash and has flipped, you can see a cable attached to the end of it, pulling it along.
Corrected entry: In the burning fire in the warehouse, Dennis Quaid throws his helmet out of the top floor window then grabs the small child and goes down a helter skelter type slide. Inexplicably he and the child reach ground level before his helmet despite the helmet getting a good head start and a helping hand from gravity.
Corrected entry: In the scene when he wants to interrupt the 2nd murderer he uses a Mastercard to open the door - at that time they were still called MasterCharge.
Corrected entry: Father and son talk with each other via a old-fashioned 60's radio and don't need to press the button. They sometimes even talk both at the same time without having a full-duplex radio.
Corrected entry: When Dennis Quaid is locked in the room in the police station he sets off a sprinkler with a flame from an aerosol can in 1969. Surely it would have been filled with CFC gas as a propellant which is not flammable. Aerosol cans burn today as the propellant is butane and propane. I believe the first non-CFC aerosols were introduced in the early 1980s.
Corrected entry: When the son contacts the father and saves him from the fire, that causes the mother to fall victim to the serial killer. After that transmission, the son calls his mom and gets her answering machine. In the morning he calls again and it's a deli instead. The event causing his mom to fall victim should have been initiated right after the transmission; therefore, he wouldn't have got her answering machine.
Corrected entry: In the scene where the father is in the burning building, he throws his helmet out the window before he jumps out. You see the helmet fall and hit the ground, him hit the water, then the helmet hit the ground again.
Corrected entry: After Dennis Quaid tells the cop (the friend of the families) about the radio he tells him what is going to happen in the baseball game which is being showed on the television to try prove it to him, then later when the same cop is talking to Dennis Quaid's wife in the restaurant about what is going to happen to her husband, which is a sensitive subject, he stands up and leaves the table to watch the game. We, know why he is doing this but she seems quite content to let him leave an important conversation just to watch a game.
Corrected entry: How is it that chief didn't know that murderer was going to be there in present time? And if he didn't, how did Dennis Quaid know? And don't you think think thirty years would have been plenty of time for the murderer to exact his revenge? It seems to me that they folded time one time too many and didn't figure out whether or not a one-handed identified serial killer would have been caught.
Corrected entry: In the scene where the Father decides to give up smoking, his wife handed him a pack of Marlboro's, but when they show them again crumpled and being thrown in the trash, they are Camel's.
Corrected entry: When Frank goes to the Buxton fire he is remembering what John told him about how he died/will die in the fire by going the wrong way to get out. So Frank, when confronted with a choice of two exits, chooses one and reaches safety. How could he be sure that his choice was right, since this is the first time he has been in this particular situation, and he has no idea which exit he took/will take, to reach safety the first time, since there wasn't a first time as far as he is concerned? THIS is his first time. This would be the classic dilemma, and totally unsolvable.
Corrected entry: When Frank is teaching his son to ride the bike both times, John is wearing a helmet. Kids didn't wear helmets on bikes in the sixties.