“Agatha Christie’s Seven Dials” is a three-part limited series written by “Broadchurch” creator Chris Chibnall (“Doctor Who”), premiering Jan. 15, 2026, on Netflix. Adapted from Christie’s 1929 novel, “The Seven Dials Mystery,” the series follows BAFTA Rising Star Award winner Mia McKenna-Bruce (“How to Have Sex”) as Lady Eileen “Bundle” Brent as she becomes entangled in a murder investigation. Helena Bonham Carter (“One Life,” “Nolly”), Martin Freeman (“The Responder,” “Black Panther”), and Corey Mylchreest (“Queen Charlotte: A Bridgerton Story”) round out the ensemble.
Here’s everything we know about “Agatha Christie’s Seven Dials,” including the cast lineup and casting opportunities.
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Set in England in 1925, the story begins with a lavish country house party that turns deadly after a practical joke goes horribly wrong. Lady “Bundle” Brent, known for her intelligence and curiosity, takes on the investigation. As she digs deeper, she uncovers a conspiracy that will change her life.
- Mia McKenna-Bruce as Lady Eileen “Bundle” Brent
- Helena Bonham Carter as Lady Caterham
- Martin Freeman as Battle
- Corey Mylchreest as Gerry Wade
- Edward Bluemel as Jimmy Thesiger
- Nabhaan Rizwan as Ronnie Devereux

Credit: Simon Ridgway/Netflix
Robert Sterne, known for his work on “The Crown,” “Game of Thrones,” and “Dangerous Liaisons,” is the casting director.
Want to understand Sterne’s process? Check out this article: How ‘The Crown’ CDs Are Building Its Modern Royal Family
Curious about casting with Netflix? These resources can help:
- Netflix casting calls
- These Netflix Projects + Other Great Gigs Need Talent Now
- How to Audition for Netflix

Credit: Justin Downing/Netflix
While production on “Agatha Christie’s Seven Dials” has wrapped, many projects are still seeking talent. Check these weekly updated casting roundups:
Bookmark these casting directory pages for even more opportunities:
Boost your audition confidence by mastering your prep with these guides: