One element of the novel is inexplicably changed: the characters "Chapman" and "Kubik" have their names exchanged.
Jim Caviezel refused to shoot an explicit love scene with his co-star Ashley Judd out of respect for his wife and his devout Catholic beliefs. In the final film, both he and Judd appear fully clothed during their scene.
General Marks is seen wearing a Medal of Honor neck medal. It appears to be a post 1942 Navy version.
Melissa Molinaro's debut.