At a Glance
- Lady Caterham and Jimmy orchestrated the formula theft and two murders.
- Bundle’s mother confesses she sold out England for money after losing faith in the country.
- The secret society is a government spy ring that recruits Bundle in the final scene.
Why it matters: The adaptation turns a 1929 whodunit into a modern spy thriller, setting up a potential new franchise for Netflix.
Agatha Christie’s Seven Dials dropped on Netflix January 15, 2026, delivering a three-part miniseries that reimagines the 1929 novel as a high-stakes espionage story. What begins as a country-house overdose becomes a twisted tale of betrayal, secret metals, and family murder.
The Setup: A Party Ends in Murder
The Chimneys estate hosts a lavish party thrown by Lady Caterham and her daughter Bundle.
The next morning, guest Gerry Wade lies dead beside a bottle of sleeping pills.
Friends insist Wade never used medication, so Bundle starts asking questions.
A note written by Wade mentions “seven dials,” sending Bundle to a London jazz club.
Hidden above the dance floor sits a covert meeting room for a society also called the Seven Dials.
Bundle overhears plans for a summit between British officials and Dr. Cyril Matip, a Cameroonian scientist who has created a bullet-proof metal thinner than foil.
The Summit: A Country Estate Becomes a Battleground
Bundle secures invitations for herself, Jimmy, and Bill to the rural summit.
Scotland Yard’s Superintendent Battle is already on site, investigating both Wade’s death and a possible espionage angle.
Bundle posts Jimmy and Bill outside Matip’s door to guard the formula.
That night a gunshot rings out; Jimmy has a flesh wound and claims a large intruder escaped.
At breakfast Lorraine, Wade’s sister, announces she has lost an earring and heads upstairs.
She vanishes and the safe in Matip’s room stands open-formula gone.
The Chase: A Train Ride Turns Deadly
Bundle, Jimmy, and Bill pursue Lorraine by car and board her departing train.
In a cargo car Jimmy produces a gun: he and Lorraine are partners.
Lorraine admits she murdered her brother after he discovered her plot.
Jimmy shot his own arm to deflect suspicion.
Jimmy shoots Bill and bargains with Bundle for a share of the profits.
Using Bill’s hidden gun, Bundle fires back; Jimmy flees through the cars.
He warns her not to proceed to the front of the train.
The Final Shock: Lady Caterham as Buyer
Bundle enters the first compartment and finds her mother waiting.
Lady Caterham reveals she arranged the sale: after losing husband and son in World War I, the estate is broke and she has lost faith in England.
Battle arrives moments later and arrests her.
Epilogue: A Spy Ring Revealed
Back in London, masked men abduct Bundle and take her to the Seven Dials club.
The members unmask; Battle chairs the table and explains the society is a government agency combating global terror.
Bundle’s late father was an agent, killed on a classified mission.
Battle offers her his vacant seat and passes her a mask.
She smiles: “Tell me everything.”
Will There Be More?
Christie never wrote a sequel to The Seven Dials Mystery.
Netflix lists the show as a limited three-part event, and no renewal has been announced.
