Frequency

John Sullivan (Caviezel) is a troubled New York City cop who has never quite recovered from the childhood trauma of the death of his firefighter dad, Frank (Quaid). Due to rare sun spot activity and high Frequency radio waves, John is suddenly able to communicate with his dad thirty in the past through his ham radio. John is able to keep his dad from dying in the fire, but by changing this piece of history, his mother (Mitchell) is targeted by a serial killer, and both men work together to change fate once again.warn his dad.