The night the lights appear in the sky near Seattle, Washington, the location is written on the screen as Forks, Washington and a state police officer is shown pulling over to the side of the road. When she gets out of the police car, the patches on her uniform show her to be an Idaho police officer, not a Washington State police officer.
On February 13, 1986, Denny watches U.S. President Ronald Reagan deliver a speech before the United Nations General Assembly in which he says that humanity would unite in the face of an alien invasion. In reality, Reagan delivered this speech on September 21, 1987.
Eric Crawford says that Tom Clarke became a believer in UFOs months before the Mojave Desert Sightings. However, in Maintenance (2002), Eric saw Tom speaking on television about his newfound belief in aliens on October 30, 1980 while the Mojave Desert Sightings took place on November 8, 1980.