Agatha Christie's Seven Dials Cast Guide: Who's Who in the New Whodunit - Netflix Tudum

  • Who’s Who

    Who’s in Agatha Christie’s Seven Dials? Meet the Cast of Sleuths and Suspects

    Mia McKenna-Bruce leads a murderously talented cast including Helena Bonham Carter, Martin Freeman, and more.

    Jan. 15, 2026

The high society of Agatha Christie’s Seven Dials is full of glamorous faces — and one of them is a killer. 

In the new adaptation of Christie’s 1929 novel The Seven Dials Mystery, Lady Eileen “Bundle” Brent (Mia McKenna-Bruce) is drawn into a growing conspiracy, and no one is safe. It all started with a simple practical joke, but now people are turning up dead. Bundle may be an unlikely sleuth, but she must unravel the mystery before it’s too late.

For writer Chris Chibnall (Doctor Who, Broadchurch), the opportunity to adapt an underrated Christie novel was irresistible. But the real appeal of Seven Dials is its heroine. “The main thing was this incredible lead character of Bundle at the center of it,” he told Netflix. “I just thought, ‘Why haven’t we seen this character onscreen recently?’ The idea of bringing Bundle to life, with all the resources that modern filmmaking will give us, just felt really exciting.”

Any detective story needs its cast of suspects, and Bundle has plenty on her plate, from wealthy friends to the police themselves. “What a cast!” Chibnall said. “We wanted exceptional actors in every part, and we’ve been really lucky to get them.” 

Read on to meet those exceptional actors, and stream Agatha Christie’s Seven Dials on Netflix now.

A young woman wearing a plaid hat and coat drives a vintage convertible car with a red leather interior down an empty street lined with buildings, evoking a historical or early 20th-century setting.

Mia McKenna-Bruce

as Lady Eileen “Bundle” Brent
About the Character

Lady Eileen is the Chimneys’ hostess, a plucky and intelligent young woman who chafes at the constraints of high society. When a friend turns up dead, she dives into the criminal underworld. 

 

Bundle’s effervescent personality was a joy to play for star McKenna-Bruce. “There’s a line in the first episode, that’s actually in the book as well, where Bill says ‘Isn’t she just it?’ ” McKenna-Bruce told Netflix. “There's no real way to describe her. She just is this piece of magic that bounces about, that everyone loves and everyone listens to, even though the odds are stacked against her.”

Previously In

McKenna-Bruce won the BAFTA Rising Star Award for her performance in How to Have Sex. She’s also appeared in films including The Fourth Kind, The Fence, and Kindling, and television series including EastEnders, Tracy Beaker Returns, The Dumping Ground, and Vampire Academy. She’ll next be seen as Maureen Starkey in Sam Mendes’s Beatles films.

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Two women in vintage formal attire at a dimly lit, elegant gathering, one staring intently ahead and the other holding a decorative mask, creating a mysterious and dramatic mood.
Simon Ridgway/Netflix

Helena Bonham Carter

as Lady Caterham
About the Character

Lady Caterham is Bundle’s homebody mother. She loves her daughter but isn’t quite as big a fan of socializing as Bundle is.

 

Carter played Lady Caterham as both Bundle’s mentor and her charge. “She’s psychologically very fragile and spends a lot of her time gardening,” Carter told Netflix. “She’s forced into the situation of responsibility and has to act as man of the house. Bundle is all she has, and while Bundle is her daughter, she can also act like a parent.”

Previously In

Carter has been nominated for two Academy Awards, once for Best Actress in The Wings of the Dove and once for Best Supporting Actress in The King’s Speech. She also won two Screen Actors Guild Awards as part of the ensemble of The Crown. She’s also appeared in films including Fight Club, A Room with a View, the Harry Potter series, Sweeney Todd: The Demon Barber of Fleet Street, Enola Holmes, Charlie and the Chocolate Factory, Big Fish, and Les Misérables.

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A man in a trench coat and hat walks on a cobblestone street in a historic city setting. Another man sits on a bench reading a newspaper, with two more people walking in the background, all dressed in vintage attire.
Justin Downing/Netflix

Martin Freeman

as Superintendent Battle
About the Character

Superintendent Battle is one of a long line of Christie sleuths, including Miss Marple and Hercule Poirot; he even met Poirot in 1936’s Cards on the Table. In Agatha Christie’s Seven Dials, he’s trying to solve the case on his own terms, even if Bundle keeps getting in the way.

 

Freeman found the costuming crucial to his performance. “Amy Roberts, our costume designer, she’s a master collaborator,” he told Netflix. “When you’re in a bespoke three-piece suit, it just informs everything — how you move and sit. It just gives you so much insight into who Battle is as a character, the formality of it all. Like, this is a man who had a military background. It’s smart but so understated, you almost don’t notice all the little details that have gone into it.”

Previously In

Freeman is no stranger to whodunits after playing John Watson to Benedict Cumberbatch’s Sherlock on the series of the same name. He won a Primetime Emmy Award for that performance and was nominated for his performance in Season 1 of Fargo. Other roles include Peter Jackson’s blockbuster The Hobbit trilogy, the original UK The Office, The Hitchhiker’s Guide to the Galaxy, Black Panther, The World’s End, Secret Invasion, and Love, Actually.

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Young man in dress shirt, tie, and sweater vest stands on outdoor stone steps, arms outstretched and expression intense, with a motorcycle partially visible in the corner, suggesting a dramatic or urgent moment.
Simon Ridgway/Netflix

Edward Bluemel

as Jimmy Thesiger
About the Character

Jimmy is a local bachelor who joins Bundle in her investigation. He’s a cad, but a charming one.

 

Bluemel relished the opportunity to dress in Jimmy’s clothes. “Jimmy is a bit of a peacock and a fop, so his costumes were so fun to wear,” he told Netflix. “Lots of beautiful tailoring and patterns really helped me get into the character of a debonair young bachelor.”

Previously In

Bluemel starred as MI6 agent Hugo on Killing Eve. Other roles include those in Persuasion, My Lady Jane, How to Build a Girl, A Discovery of Witches, Sex Education, Brave New World, and more.

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A man in a suit sits at a wooden desk in an old-fashioned office, talking on a rotary phone, with papers, a lamp, and vintage decor around him, and large windows letting in natural light.

Nabhaan Rizwan

as Ronnie Devereux
About the Character

Ronnie is a party guest the night of the Chimneys murder and an employee at the Foreign Office. He’s a close friend of Gerry Wade. 

 

He’s also a bad dancer, as seen in the opening party scene. “I was told Ronnie’s not much of a dancer, so I didn’t learn the choreography like everyone else,” Rizwan told Netflix. “I very much had to freestyle, taking care to omit modern dance moves such as the worm. I will save the worm for another role.”

Previously In

Rizwan played the god of festivity Dionysus on KAOS, so he’s familiar with parties. Other roles include those in 1917, Mogul Mowgli, The Accident, Informer, Station Eleven, Juice, and Industry.

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A couple in elegant attire dance closely at a formal, candlelit party, surrounded by other guests in masks and tuxedos, creating an intimate and romantic atmosphere.
Simon Ridgway

Corey Mylchreest

as Gerry Wade
About the Character

Wade is another contemporary of Bundle’s, an employee at the Foreign Office. He’s also a guest at Chimneys on the night of the murder. 

Previously In

Mylchreest played King George III on Queen Charlotte: A Bridgerton Story. Other roles include those in My Oxford Year, Hostage, The Sandman, and Daddy Issues.

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A young woman with curly hair sits indoors, looking thoughtful or concerned. She is in a dimly lit room with framed paintings and antique decor in the background.

 Ella-Rae Smith

as  Loraine Wade
About the Character

Loraine is Gerry’s sister. She soon gets sucked into Bundle and Jimmy’s investigation, whether she likes it or not.

Previously In

Smith starred in the BBC’s Clique as Phoebe. Other roles include those in Into the Badlands, Fast & Furious Presents: Hobbs & Shaw, The Stranger, The Commuter, and Foundation.

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A man in formal wear sits at a candlelit restaurant table with cocktails and dinnerware, facing another person whose back is visible. The setting is elegant, warm, and dimly lit, with a vintage lamp providing soft light.

 Hughie O’Donnell

as  Bill Eversleigh
About the Character

Bill is a Foreign Office employee and Bundle’s friend. He   finds himself pulled into her investigation because he was also present the night of the tragic Chimneys party.

Previously In

O’Donnell made his film debut in Fight or Flight opposite Josh Hartnett.


Two men stand in an elegant, dimly lit room with wood paneling and bookshelves; one wears a long coat and looks serious while the other adjusts his suspenders, adding a sense of tension to the scene.
Simon Ridgway/Netflix

Alex Macqueen

as George Lomax
About the Character

George Lomax is the pompous boss of the Foreign Office, a blowhard without compare. 

Previously In

Macqueen played the prime minister’s “blue skies advisor,” Julius Nicholson, on The Thick of It. Other roles include those in Peaky Blinders, Black Mirror, The Inbetweeners, Downton Abbey: A New Era, In the Loop, Slow West, and All Is True.

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A man in a light suit and white fedora hat stands outdoors in a sunlit arena, looking towards the camera with a serious expression. The background shows empty seating.

Iain Glen

as Lord Caterham
About the Character

Lord Caterham is Bundle’s deceased father, who died on the continent under suspicious circumstances.

Previously In

Glen played devoted knight Jorah Mormont on Game of Thrones. Other roles include those in Silo, Resident Evil, Jack Taylor, Lara Croft: Tomb Raider, Titans, Downton Abbey, and The Rig.

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Other cast members include:

  • Mark Lewis Jones (Hostage, Gangs of London) as Sir Oswald Coote
  • Dorothy Atkinson (Mr. Turner, Call the Midwife) as Lady Maria Coote
  • Guy Siner (’Allo ’Allo!, Star Trek: Enterprise) as Tredwell
  • Josef Davies (Young Wallander, The King) as Alfred
  • Nyasha Hatendi (Swan Song, Alex Rider) as Dr. Cyril Matip
  • Tim Preston (One Day, Masters of the Air) as Rupert “Pongo” Bateman

All About Agatha Christie's Seven Dials

  • Interview
    Seven Dials Stars Mia McKenna-Bruce and Corey Mylchreest Talk Early Careers
    The actors discuss chaos, confidence, and finding their footing in the industry.
    By Madeleine Saaf-Welsh
    Jan. 23
  • Deep Dive
    Answering every question you have about the new whodunit.
    By John DiLillo
    Jan. 16
  • News
    The murder mystery adaptation is now streaming.
    By Tudum Staff
    Jan. 15
  • News
    Lady Bundle is clocking every clue in this “treacherous” case.
    By Olivia Harrison
    Jan. 6

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