Angels & Demons (film) with author Dan Brown. In May 2006, following the release of the 2006 film adaptation of "The Da Vinci Code", Sony Pictures hired screenwriter Akiva Goldsman, who wrote the film adaptation of "The Da Vinci Code", to adapt "Angels & Demons". Filming was originally to begin in February 2008 and was originally going to be released on December 19, 2008, but because of the 2007–2008 Writers Guild of America strike, the film was pushed back for May 15, 2009. David Koepp rewrote the script before shooting began. Director Ron Howard chose to treat "Angels & Demons" as a sequel to
The Da Vinci Code of Michael Baigent, Richard Leigh and Henry Lincoln, who authored the book "Holy Blood, Holy Grail", in the program "The Real Da Vinci Code", shown on British TV Channel 4. The program featured lengthy interviews with many of the main protagonists cited by Brown as "absolute fact" in "The Da Vinci Code". Arnaud de Sède, son of Gérard de Sède, stated categorically that his father and Plantard had made up the existence of the Prieuré de Sion, the cornerstone of the Jesus bloodline theory: "frankly, it was piffle", noting that the concept of a descendant of Jesus was also an