In short: A good movie!
This is a sort of time-travel movie starring Dennis Quaid and Jim Caviezel, in which a father and son are able to communicate across a span of 30 years via a Ham radio and some sunspot/Aurora Borealis phenomenon. The actual premise for this is not really explained, which I saw as a good thing. (They couldn't mess up the science of it then!)
The movie concentrates on how changing the past changes the present. You may think this topic is hackneyed and dull, but Frequency is lively and entertaining. It is a suspensful, well-put together movie with a good dose of humor and a few lovely plot twists.
I caught a sneak preview. Do tell me what you think of it if/when you see it! It opens Friday, April 28.