Netflix Releases Official Trailer for Agatha Christie’s Seven Dials Ahead of January Premiere

Netflix has unveiled the official trailer for Agatha Christie’s Seven Dials, the upcoming British mystery series adapted from Christie’s 1929 novel. The three-part drama will premiere globally on January 15, 2026, with all episodes available to stream exclusively on Netflix.

The new trailer offers the first extended look at the stylish period adaptation, which brings together a mix of classic Agatha Christie intrigue and modern cinematic storytelling. Set in 1920s England, the series follows a lavish country-house gathering that takes a deadly turn, plunging guests into a tense and unpredictable murder investigation.

What Is Seven Dials About?

The official logline from Netflix describes the story clearly:

When a glamorous weekend house party ends in murder, a fearless young aristocrat named Lady Eileen “Bundle” Brent decides to uncover the truth herself. What begins as a personal quest soon expands into a complex conspiracy filled with secret societies, political power plays, and a race against time.

The series blends wit, charm, and psychological suspense as Bundle attempts to solve the crime before another victim falls. Fans of classic Christie adaptations such as And Then There Were None and The ABC Murders will recognize the familiar themes of class tension and hidden motives.

Cast and Characters

Netflix has assembled a high-profile ensemble led by veteran and rising British talent.

Confirmed Cast:

• Mia McKenna-Bruce as Lady Bundle Brent – the quick-witted heroine at the center of the story

• Helena Bonham Carter as Lady Caterham

• Martin Freeman as Superintendent Battle

• Edward Bluemel as Jimmy Thesiger

• Corey Mylchreest as Gerry Wade

• Guy Siner as Tredwell

• Alex Macqueen as George Lomax

• Nyasha Hatendi as Dr. Cyril Matip

• Additional appearances from Guy Siner, Alex Macqueen, and others

The trailer hints at strong chemistry between McKenna-Bruce and Freeman, with Superintendent Battle serving as both ally and obstacle to Bundle’s amateur investigation.

The Creative Team Behind the Adaptation

The project is written and adapted by Chris Chibnall, best known for his work on Doctor Who and Broadchurch. Chibnall serves as showrunner and executive producer, steering the series for Warner Bros. Television in partnership with Agatha Christie Limited.

The adaptation is expected to retain the novel’s authentic 1920s atmosphere while updating the pacing for modern streaming audiences.

Series Format

Seven Dials will consist of:

• 3 feature-length episodes

• Approximately 50 minutes each

• A complete standalone limited series

• Genre: British Thriller, Mystery Drama

Where to Watch Agatha Christie’s Seven Dials

The series will be available to stream worldwide on:

Streaming Platform:

• Netflix – exclusive global home

• Release Date: January 15, 2026

• Territories: Available across all major Netflix regions including the United States, Canada, United Kingdom, Australia, Europe, the Middle East, and India

• Viewing Options: English subtitles and multiple localized language dubs expected

Unlike traditional BBC or ITV releases, this adaptation is launching directly to Netflix, allowing fans to binge the entire mystery from day one.

Trailer Highlights

The official teaser promo reveals:

• The grand country estate of Holby City-style sets

• Bundle sneaking through darkened hallways

• A cryptic circle of clocks—hinting at the “Seven Dials” society

• Superintendent Battle arriving spooked by unexplained murders

• A visual tone inspired by Christie’s own earlier works

The contrast between glamour and danger is one of the most striking elements of the trailer.

More About the Original Novel

Agatha Christie’s Seven Dials Mystery was originally published on March 17, 1929 by Jitsugyo no Nihon Sha. The novel has long been considered a cult-favorite among Christie readers thanks to its sharp humor and adventurous female lead.

This 2026 Netflix version represents the first time the novel has been adapted as a dedicated anime-style virtual procedural.

Netflix’s release of the official trailer confirms that Agatha Christie’s Seven Dials is ready to become must-watch mystery television in January 2026. With a stacked cast, a timeless premise, and Chris Chibnall guiding the process, the series is positioned to capture both hardcore Christie fans and brand-new global audiences.

Expect the unexpected when the curtain rises on January 15.