Netflix is being unusually careful about the name. The project is not officially titled The Secret of Secrets; for now, it remains an untitled Robert Langdon series set in the world of Brown's 2025 novel.
What is no longer uncertain is production. Cameras are rolling in Prague, and the first image from the shoot places Morgan Spector's Robert Langdon beside Rebecca Hall's Katherine Solomon in the city itself.
This is another reset for Robert Langdon
Spector follows two very different screen versions of the Harvard symbologist. Tom Hanks carried the role through The Da Vinci Code, Angels & Demons and Inferno, while Ashley Zukerman played a younger Langdon in the short-lived television adaptation of The Lost Symbol.
Netflix is not presenting its show as a continuation of either version. It has a new Langdon, a new creative team and, crucially, a much longer format.
Carlton Cuse has argued that Brown's novels are unusually difficult to compress into a two-hour film because their momentum sits beside large amounts of history, symbolism and philosophical material. An eight-hour television structure gives the adaptation room to keep more of those layers without constantly racing to the next clue.
Katherine Solomon makes this Langdon more personal
Rebecca Hall's Katherine is a scientist whose disappearance puts the central mystery in motion. Langdon must find her and recover a groundbreaking manuscript before its discoveries about human consciousness fall into the wrong hands.
The familiar Brown ingredients remain: ancient forces, modern science, mystical ideas, international locations and a professor whose academic expertise keeps becoming extremely dangerous outside a lecture hall.
Katherine adds something less familiar. Cuse describes her as Langdon's first serious love interest, giving the writers a chance to explore a side of the character that previous screen adventures rarely made central.
Dan Brown is building the adaptation with Carlton Cuse
Brown is not simply licensing the novel and stepping away. He and Cuse co-created the series, with Brown serving as executive producer. Cuse is showrunner, writer and executive producer, bringing experience from Lost, Bates Motel, Locke & Key and Tom Clancy's Jack Ryan.
The supporting cast was already substantial. Cherry Jones plays Heide Nagel, Corey Stoll is Everett Finch, Rob Delaney is Jonas Faukman and Abbey Lee appears as Sasha Vesna.
Five recurring performers joined as production began: Mamoudou Athie as Michael Harris, Ben Levi Ross as Alex Conan, Anamaria Marinca as Dr. Gessner, Richard Sammel as Karl Muller and Elena Saurel as Susan Housemore.
Prague is part of the story, not just the production plan
Shooting in Prague gives the series a useful connection to its source material because the Czech capital is itself one of the key locations in The Secret of Secrets. Netflix's first production photo immediately uses that geography rather than hiding it.
For a franchise built around architecture, history and symbols embedded in real places, that distinction matters more than it would for a generic thriller.
There is still no release date
Netflix has not announced a premiere date or an official series title, and there is no trailer yet. Production is only now underway.
For the moment, the clearest change is the format: Robert Langdon has another mystery, another actor and substantially more hours in which to solve it.
