
Edge of Darkness is worth seeing for Gibson's performance and the eerily realistic and supremely vile basis of the plot. Unfortunately, the film narrative is like the old “Highway Patrol” series with Broderick Crawford, linear and mundane.
It seems Gibson is destined for themes concerning death. Hero of democracy, William Wallace, was drawn and quartered at the end of Braveheart. Apocalypto showed the extraordinary efforts that a father would take to protect his wife and child in the midst of relentless violence.
In Edge, Gibson conveys the most feared and tragic form of mourning – the parental loss of a child. There are few events more tragic and heart rending. The loss of a child can end a parent's life, both figuratively and literally.