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Brief dismissive reference to Dan Brown's theory that the Merovingian bloodline continued to the present day, alluding to his conspiracy thriller works

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A passage is read (from the audiobook narrated by Ian McKellen) discussing the Merovingian bloodline and its supposed connection to Christ's lineage. The hosts explicitly identify this as 'The Da Vinci Code' by 'the acclaimed novelist, renowned novelist, Dan Brown.'

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Explicitly mentioned as a book containing Christmas-themed claims by the character Sir Lee Teabing about Christian icons being derived from pagan traditions

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Mentioned alongside Holy Blood and Holy Grail as promoting the theory that the Holy Grail represents the bloodline of Christ.

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Referenced throughout the episode series as the starting point for discussing Cathar conspiracy theories, including the idea of the Cathars as a secret society protecting the bloodline of Jesus and Mary Magdalene

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Referenced as a book discussed in the previous episode, connected to conspiracy theories about the Cathars and the Priory of Zion

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The main subject of the episode, discussed extensively as the 20th anniversary of its 2003 publication. The hosts read from the opening and analyze its claims about the Priory of Sion and Jesus's bloodline.

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Mentioned as Dan Brown's first book featuring the character Robert Langdon, the Harvard symbologist.