"JESUS, MARY AND DA VINCI" is reviewed by Slate Magazine (via Protocols). This documentary, if it even deserves to be called one, sounds pretty lame. This excerpt of the review sums it up nicely:

To Vargas' and the producers' credit, they trot out some impressive scholars to comment, including Elaine Pagels, Jack Wasserman, and Umberto Eco. While many of the interviewees express polite interest in the theoretical ramifications of this notion, they can't shed any real light on the question. Yes, the Catholic Church has had problems dealing with sex and women. And it behaved extremely badly at times, the Crusades and the Inquisition being two shameful examples. But those sad facts do not a conspiracy make. As titillating or shocking as the idea of Jesus having sex might be, we just don't know if he did. The few historical texts we can refer to, including recently recovered ones like the Gospel of Thomas, don't mention Mary's relationship to Jesus, and so they don't bring us closer to the truth.

The film no doubt aims to encourage religious discussion by bringing an incendiary theory to light. But any debate on this topic is bound to be fruitless and frustrating since hard facts simply don't exist to support it. In the end, the film only provides extra (unnecessary) publicity for Brown's best-selling novel.