A movie adaptation of "O Mistério da Estrada de Sintra" was produced in 2007. The director had shortly before directed a series inspired in a whodunit involving the descendants of the original novel's characters ("Nome de Código Sintra", Code Name Sintra), and some of the historical flashback scenes (reporting to the book's events) of the series were used in the new movie. The movie was more centered on Eça's and Ramalho Ortigão's writing and publishing of the original serial and the controversy it created and less around the book's plot itself.