Anthony Edwards is pretty good and so are his assistant kids. As for the plot, it played out like something derived from somebody who skimmed some Dan Brown knowledge, read a Wikipedia article on Robert Anton Wilson series and watched National Treasure 2. Oh, and watched Alias but only paid attention to the Rambaldi parts.
That said, it's pretty entertaining, especially if you pretend that your watching a TV show produced in a different dimension, like I am. For your best enjoyment, you need to turn your brain up to the point that you can understand how the various clues/conspiracies but not so far up that your conscious of the many, many ways this stuff wouldn't happen in the real world. And not the goofy conspiracy stuff, either. I'm talking stuff like the world's number one terrorist abducting a woman in full view of various surveillance cameras and not bothering to cover his face. Like that.
"The most dangerous man, to any government, is the man who is able to think things out for himself. Almost inevitably, he comes to the conclusion that the government he lives under is dishonest, insane and intolerable." - H. L. Mencken