Four more actors have booked their tickets into Dan Brown's world. Cherry Jones, Corey Stoll, Rob Delaney and Abbey Lee have joined the cast of Netflix's upcoming TV adaptation of Brown's novel The Secret of Secrets, according to Deadline. (Deadline, 5 August 2026)

The series already has its leads. Morgan Spector stars as Robert Langdon, the Harvard symbologist at the centre of nearly every Brown thriller. Rebecca Hall plays Katherine Solomon, a scientist who is Langdon's girlfriend in the book. In the novel, published by Doubleday on 9 September 2025, Langdon races against ancient forces and the clock to rescue a missing scientist and her manuscript. The adaptation is described as blending futuristic science with mystical lore.

The four new additions each step into named roles. Corey Stoll plays Everett Finch, a former CIA agent. Cherry Jones takes on Heide Nagel, a U.S. Ambassador in Prague who becomes involved in a secret project Finch leads. Rob Delaney is Jonas Faukman, an editor swept into a sticky situation. Abbey Lee plays Sasha Vesna, a research assistant working for a scientist named Dr. Gessner.

Behind the camera, the series has heavyweight credentials. Carlton Cuse — the showrunner behind Lost and The Strain — co-created the series with Brown himself and serves as writer and showrunner. Emma Forman of Cuse's Genre-Arts and Zoe Robyn also executive produce. The project landed at Netflix in May 2025 with a straight-to-series order, meaning no pilot episode was shot first; the platform committed to a full season from the start.

Brown's track record gives Netflix plenty to work with. His novels, including The Da Vinci Code and Angels & Demons, have sold more than 250 million copies across 56 languages. Robert Langdon has already appeared in three feature films, with Tom Hanks in the role, and the 2020 Peacock series The Lost Symbol cast Ashley Zukerman as a younger version of the character.

The Netflix series is still untitled. No release date or episode count has been announced.