History Specials Season 1 Episode 64 The Templar Code

For nearly two centuries, the Knights Templar were the medieval world's most powerful order, a fearsome and unstoppable Crusader militia. Then came accusations of unspeakable crimes. Who were the Templars, really? How did they become so powerful, so fast, and why did they fall just as quickly? Evidence hints that the Templars excavated under Jerusalem's Temple of Solomon. What did they find there? Was it, as The Da Vinci Code suggests, the true identity of the Holy Grail--the bloodline of Christ?