In the 2000 movie Frequency, a son, John Sullivan (James Caviezel), is presented with an opportunity to prevent the death of his father, Frank Sullivan (Dennis Quaid), through a miracle of nature in which they were both able to communicate across time 30 years using the same am radio, transmitting the signal via a freak occurrence of the Northern Lights. This one action, however, had several undesirable consequences, including the murder of his mother by a vicious killer known as the Nightingale who was supposed to have never been caught.