Agatha Christie’s Seven Dials (Netflix): Season, Cast & Filming Locations
The Netflix limited series Agatha Christie’s Seven Dials premiered on 15 January 2026. It is a three-part adaptation of Agatha Christie’s 1929 novel The Seven Dials Mystery, written by Chris Chibnall, creator of Broadchurch.
The series follows Lady Eileen “Bundle” Brent as she investigates a fatal prank at a country house party — a case that slowly exposes a high-level political conspiracy.
Who Are the Members of the Seven Dials?
In the Netflix series, the Seven Dials is a secret government organisation, not just a social club. Its members operate in the shadows and are deeply connected to British political power.
A major revelation in the show is that:
- Superintendent Battle is secretly “Number Seven”, the leader of the Seven Dials group.
The organisation’s true purpose and leadership are uncovered gradually as Bundle’s investigation progresses.
Who Plays Lady Coote in Seven Dials (2026)?
Lady Maria Coote is played by Dorothy Atkinson.
Her character is:
- The hostess of the party at Chimneys estate
- Closely tied to the events that trigger the mystery
- One of the key figures connecting multiple suspects
Is the New Agatha Christie Series on Netflix?
Yes. Agatha Christie’s Seven Dials is a Netflix original limited series.
- Streaming exclusively on Netflix
- Released worldwide on 15 January 2026
- Available to watch in full
How Many Episodes Are in Seven Dials on Netflix?
The series consists of 3 episodes.
It is a complete miniseries, meaning:
- The full story is told in one season
- No continuation or second season is planned
Main Cast & Characters
The show features a mix of well-known British actors and rising stars:
- Mia McKenna-Bruce as Lady Eileen “Bundle” Brent
The curious and fearless protagonist leading the investigation. - Martin Freeman as Superintendent Battle
A Scotland Yard detective revealed to be Number Seven, leader of the secret organisation. - Helena Bonham Carter as Lady Caterham
Bundle’s mother — and in a major twist, the mastermind behind the conspiracy. - Edward Bluemel as Jimmy Thesiger
A charming socialite later exposed as a murderer and thief. - Corey Mylchreest as Gerry Wade
Bundle’s close friend and love interest whose death sparks the mystery. - Dorothy Atkinson as Lady Maria Coote
The influential hostess of the Chimneys estate gathering.
Where Was Seven Dials Filmed?
The series was filmed across historic UK locations and parts of Europe to recreate 1920s England.
Key Filming Locations:
- Badminton House, Gloucestershire – Chimneys, the Brent family estate
- Westonbirt House, Gloucestershire – Wyvern Abbey
- Bath – Great Pulteney Street and Abbey Green for period street scenes
- Bristol – Interior sets filmed at Bottle Yard Studios
- Ronda, Spain – Used for dramatic flashback and action sequences
Why Seven Dials Is Trending in the UK
- Netflix release boost
- Agatha Christie’s enduring popularity
- High-profile cast (Martin Freeman & Helena Bonham Carter)
- Strong social media discussion
- Viewer curiosity about the secret society and plot twists