Mel Gibson's "Braveheart" won five Oscars and made William Wallace, a 13th-century Scottish warrior, an unforgettable Hollywood character. But how historically accurate is the film? Was the real-life William Wallace a heroic freedom fighter or a common criminal turned terrorist? Was he really saved by a princess who became his lover? We examine new archeological evidence, reveal recently deciphered ancient manuscripts and conduct forensic experiments to uncover the true story of this legendary warrior.