For those who have only seen the theatrical version, you have not truly visited the crypt. You have only peered through the gate. Seek out the extended cut. Let the mystery consume you. After all, as the film whispers: The Grail is not a thing. It is a journey. And this 2006 extended cut is, without doubt, the best way to begin that journey.
The theatrical cut suffered from a "race-against-the-clock" adrenaline that left little room for reflection. Because the story relies heavily on historical theory and religious philosophy, the fast pace worked against the material. The Extended Cut remedies this by slowing the tempo. The extra minutes allow the audience to absorb the stunning locations (the Louvre, Rosslyn Chapel) and the weight of the historical secrets.