All of this is presented by way of techniques that will be recognizable to History Channel buffs. They include modern-day historians, who re-trace the routes of the crusaders and examine the ancient sites where the action took place, as well as actors who portray characters of the time (chroniclers, knights, and others); numerous re-enactments, aided by excellent cinematography and skillful use of CGI (whereby a few dozen extras could be made to look like many thousands), vividly illustrate the battles and other events that took place during this roughly 200-year period. It's an absorbing, enlightening look at events that prove one thing above all: the more things change, the more they stay the same. --Sam Graham