The controversial assertions of "The Da Vinci Code" are examined for their veracity in this installment of National Geographic's popular "Is It Real?" series. Attempting to separate fact from fiction, this globe-trotting program seeks out evidence to confirm or deny one of the most provocative ideas facing Christianity: the possibility that Jesus and Mary Magdalene married and became parents, with a bloodline that survives to this day. 47 min. Soundtrack: English.