The show was originally going to have four seasons, but when Neil Jordan thought about doing the fourth season, he didn't have the energy or even story to do ten episodes. Instead of that, he proposed Showtime to wrap up everything with a two-hour television movie. He even wrote the screenplay, but the network refused, arguing it was too expensive, and the season three ending worked as a series finale. Jordan eventually published the screenplay as an e-book called "The Borgia Apocalypse".
Lucrezia never lived in Naples with her 2nd husband, they were in Rome.