Untitled Dan Brown Series (The Secret of Secrets)

Netflix is preparing to begin production on an eight-episode series based on Dan Brown's sixth Robert Langdon novel, The Secret of Secrets. Morgan Spector leads as Robert Langdon, with Rebecca Hall cast as Katherine Solomon, a noetic scientist whose disappearance in Prague launches a globe-spanning mystery. The series is co-created by Dan Brown and Carlton Cuse, with Cuse serving as showrunner, writer, and executive producer. Emma Forman of Genre-Arts also executive produces. The production is set to film primarily in Prague, Czech Republic—where much of the novel's action takes place—as well as New York City, with filming scheduled to begin in late August 2026 and run through mid-March 2027. The series marks the first screen adaptation developed in close proximity to a Brown novel's publication and represents one of the most significant international productions filming in Prague during 2026.