Frequency (2000)

Factual error: When Shep and his partner are looking for Frank on the docks in 1969, the camera pans to the left and we see a flash of the (completed) World Trade Center buildings just before the cameraman catches his error. In 1969 construction had only just begun on the towers.

Factual error: The radio used in the film is a Heathkit SB-301 receiver only, and is, in reality, incapable of transmitting.

Factual error: In the year 1969 Dennis Quaid reaches into a pile of Albums (vinyl) to play the "King". One of the albums in that pile is "Elvis In Concert" which was not released until 1977. (00:07:40)

Factual error: When the first change in the past takes place, the victims go from three to ten. One of the victims is John's mother. He would never be allowed to be part of an investigation with his mother as a victim.