Dan Brown’s The Secret of Secrets Is Becoming a Series: A New Robert Langdon Is Coming to Prague

Robert Langdon is returning to the screen, but this time he will not look like Tom Hanks. Netflix is developing a series adaptation of The Secret of Secrets, Dan Brown’s sixth novel featuring the Harvard professor of symbology. The new Langdon will be played by Morgan Spector, best known for the historical drama The Gilded Age, while Rebecca Hall will take on the role of Katherine Solomon.

There is also an intriguing detail behind the casting: Spector and Hall are married in real life. And since The Secret of Secrets introduces something relatively unfamiliar for the character – Robert Langdon in a genuinely serious romantic relationship — the chemistry between the two is likely to become one of the most talked-about elements of the adaptation.

Dan Brown himself is also directly involved in the project as a writer and executive producer.

Morgan Spector Is the New Robert Langdon

The 45-year-old Morgan Spector began his career on Broadway before gaining wider recognition through television series including Homeland and The Plot Against America, as well as films such as Christine, A Vigilante, and Boston Strangler.

He later joined HBO’s period drama The Gilded Age, where he plays ruthless railroad tycoon George Russell – a performance that has earned him significant critical attention. His real-life partner Rebecca Hall will portray Katherine Solomon, a scientist specializing in noetic science whom readers will already know from The Lost Symbol.

In The Secret of Secrets, however, Katherine and Robert’s relationship has changed. They are now a couple. Langdon travels with her to Prague, where Katherine is due to present groundbreaking research into human consciousness. But after a mysterious incident, she disappears along with the manuscript of a book containing discoveries that could fundamentally alter the way we understand the human mind.

What follows is another race against time for Langdon only this time, the stakes are far more personal.

Abbey Lee Enters the World of the Golem

Among the most interesting additions to the cast is Australian actress and model Abbey Lee, known for Mad Max: Fury Road and Black Rabbit. Her character, Sasha Vesna, is the assistant to scientist Dr. Brigita Gessner and one of the novel’s most mysterious figures.

For readers of The Secret of Secrets, the name Sasha alone is enough to suggest just how important Abbey Lee’s role may become. The cast also includes Cherry Jones as U.S. Ambassador Heide Nagel, Corey Stoll as Everett Finch, and Rob Delaney as editor Jonas Faukman.

Prague Finally Gets to Play Prague

It is difficult to imagine a more appropriate setting for Robert Langdon’s latest adventure. This time, Prague will not simply serve as a European filming location pretending to be Paris, Vienna, or Berlin. It will play itself.

Charles Bridge, the Clementinum, Petřín Hill, the historic Jewish Quarter of Josefov, underground spaces, monasteries, churches, and the legends surrounding the Prague Golem all help shape the atmosphere of the novel.

Preparation for the production has already begun. Parts of Prague’s historic center have been reserved for crews and equipment from August 19, with the larger-scale principal photography scheduled to begin in September.

The production will remain in Prague through the autumn, with work on the series expected to continue until the end of 2026. And if Netflix makes extensive use of the real locations featured in the novel, The Secret of Secrets could become one of the most visually impressive Dan Brown adaptations to date.

From Tom Hanks to the Second Television Robert Langdon

For a huge number of viewers, Robert Langdon has one face. Tom Hanks played the professor in three films directed by Ron Howard: The Da Vinci Code in 2006, Angels & Demons in 2009, and Inferno in 2016. Critics were not always particularly enthusiastic about the adaptations, but commercially the films were enormously successful.

The Da Vinci Code became a global phenomenon, earning around $760 million worldwide. Angels & Demons followed with approximately $486 million, while Inferno brought in around $220 million.

Morgan Spector, however, will not be the first actor to inherit the role from Hanks. In 2021, Peacock released The Lost Symbol, a television series based on Brown’s novel of the same name. Ashley Zukerman played a younger version of Robert Langdon. The production ended after a single season.

That makes The Secret of Secrets the second attempt to bring Langdon’s world to television in a longer format, but this time the project is backed by Netflix, with Dan Brown himself far more directly involved in the adaptation.

When Inferno Changed the Book

The final theatrical adaptation also left plenty of readers dissatisfied. Inferno departed significantly from Dan Brown’s novel, particularly in its ending. In the book, Bertrand Zobrist’s plan has already succeeded – his virus has been released, and its consequences cannot simply be undone.

The film opts for a far more conventional Hollywood conclusion in which the catastrophe is prevented. That changes more than a handful of scenes. It alters the moral dilemma Brown leaves his readers to confront.

And this is precisely where the television format of The Secret of Secrets could become a major advantage. Instead of compressing an intricate story into roughly two hours, the upcoming adaptation is being developed as an approximately eight-hour narrative.

Six Books and More Than 250 Million Copies Sold

Robert Langdon first appeared in Angels & Demons in 2000. It was followed by The Da Vinci Code, The Lost Symbol, Inferno, Origin, and The Secret of Secrets, published in September 2025. Dan Brown’s books have been published in 56 languages, with more than 250 million copies in print worldwide.

More than two decades after The Da Vinci Code turned Brown into a global literary phenomenon, interest in Robert Langdon clearly has not disappeared. This time, the professor simply has a new face.

Dan Brown’s novels have always combined action, history, mystery, religion, science, and ambitious philosophical ideas. A two-hour film inevitably has to sacrifice some of that complexity. An eight-hour series does not have to. After three films starring Tom Hanks, one short-lived television adaptation, and tens of millions of readers, Robert Langdon is getting another chance at life on screen.

This time with a completely new face, Katherine Solomon by his side, and the whole of Prague waiting to be deciphered.