Netflix’s Agatha Christie’s Seven Dials assembles a stellar ensemble that brings the Jazz Age to vivid life with murder, espionage, and intrigue. Led by rising star Mia McKenna-Bruce and supported by British acting royalty Helena Bonham Carter and Martin Freeman, this three-episode miniseries showcases both established talent and exciting newcomers. Here’s your complete guide to who’s who in this dazzling 1920s mystery.
The Lead Investigators
At the center of this murder mystery are two very different detectives—one a spirited aristocrat playing amateur sleuth, the other a seasoned Scotland Yard professional with secrets of his own.
Mia McKenna-Bruce as Lady Eileen “Bundle” Brent
Bundle Brent is the heart and soul of Seven Dials—a spirited aristocrat who refuses to accept that her friend’s death was an accident. McKenna-Bruce portrays Bundle as a thoroughly modern woman for 1925, someone with wit, determination, and that indefinable quality the era called “it”—irresistible charisma.
The 30-year-old British actress brings lived-in authenticity to the role, having recently garnered critical acclaim for her BAFTA-winning performance in How to Have Sex. Her previous work includes appearances in EastEnders, The Witcher, Get Even, and Vampire Academy, but Seven Dials marks her first leading role in a major streaming series. Bundle’s journey from bored socialite to amateur detective—and potentially something more—allows McKenna-Bruce to showcase remarkable range across the three episodes.
Martin Freeman as Superintendent Battle
Freeman brings his signature blend of intelligence, humor, and understated authority to Superintendent Battle, the Scotland Yard detective officially investigating the same murders Bundle pursues. But is Battle helping Bundle or monitoring her? The answer becomes one of the series’ most satisfying revelations.
Battle is actually a recurring character in Christie’s works, appearing in multiple novels as a methodical, brilliant investigator. Freeman—beloved for his roles as Watson in Sherlock, Bilbo Baggins in The Hobbit trilogy, and Lester Nygaard in Fargo—describes Battle as someone who “views Bundle with skepticism but becomes impressed by her determination.” The veteran actor adds layers of mystery to what could have been a straightforward detective role, keeping audiences guessing about his true motivations until the final episode.
The Caterham Family
Bundle doesn’t investigate alone—her family history holds the key to understanding why people are dying. The Caterhams are more connected to the Seven Dials conspiracy than anyone initially realizes.
Helena Bonham Carter as Lady Caterham
In one of showrunner Chris Chibnall’s boldest creative choices, Lord Caterham from Christie’s original novel becomes Lady Caterham, Bundle’s grieving mother. Bonham Carter—one of Britain’s most celebrated actresses—brings profound emotional depth to a woman grappling with the loss of both her husband and son.
The two-time Oscar nominee (for The King’s Speech and The Wings of the Dove) has built a remarkable career spanning period dramas like A Room with a View and Howards End, Tim Burton collaborations including Sweeney Todd and Alice in Wonderland, and recent acclaimed television work in The Crown as Princess Margaret. Her Lady Caterham exists as a recluse at Chimneys estate, making Bundle’s vibrant personality all the more striking by contrast.
Iain Glen as Lord Caterham
Though he appears primarily in the series’ haunting opening sequence set in Spain, Glen’s Lord Caterham casts a long shadow over the entire mystery. The Scottish actor, best known as Ser Jorah Mormont in Game of Thrones, brings gravitas to Bundle’s father—a man whose death in a bullfighting ring five years earlier proves far more significant than anyone initially realizes.
The Young Set
Bundle’s circle of 1920s socialites forms the backdrop for murder, with each young aristocrat hiding their own secrets. These charming party-goers quickly discover that pranks and pleasures can turn deadly.
Edward Bluemel as Jimmy Thesiger
Bluemel plays Jimmy, a charming bachelor who becomes Bundle’s partner in investigation. Described as “a peacock and a dandy,” Jimmy enjoys the finer things in life—beautiful clothes, exciting adventures, and Bundle’s company. Bluemel told Netflix he delighted in wearing Jimmy’s “exquisite tailoring and patterns,” which helped him fully embrace the character.
The 32-year-old actor recently starred in Amazon’s My Lady Jane and appeared in A Discovery of Witches, Killing Eve, and Sex Education. His chemistry with McKenna-Bruce provides some of the series’ lighter moments amid the darkness.
Corey Mylchreest as Gerald “Gerry” Wade
Mylchreest portrays Gerry, the Foreign Office worker whose death launches the entire investigation. Known for sleeping through anything—including artillery fire during the Somme—Gerry becomes the victim of a prank involving eight alarm clocks that turns tragically fatal.
Fresh from playing King George in Queen Charlotte: A Bridgerton Story, Mylchreest makes Gerry both sympathetic and mysterious in the brief time we spend with him. His performance in flashbacks and early scenes establishes the emotional stakes that drive Bundle’s relentless pursuit of justice.
Hughie O’Donnell as Bill Eversleigh
Bill works at the Foreign Office alongside Gerry and becomes reluctantly drawn into Bundle’s investigation when his presence at the fatal house party makes him a witness. O’Donnell, who made his film debut in Fight or Flight alongside Josh Hartnett, brings nervous energy to a character caught between loyalty to his friends and institutional pressures.
Nabhaan Rizwan as Ronny Devereux
Rizwan plays another party guest and Bundle’s friend whose own encounter with danger—jumping in front of Bundle’s car—provides crucial clues about the Seven Dials conspiracy. The actor, known for Mogul Mowgli, 1917, Informer, and Station Eleven, creates a memorable impression in limited screen time.
The Conspirators and Suspects
Beyond Bundle’s social circle lurk the true players in this espionage thriller—inventors, nightclub employees, wealthy patrons, and mysterious figures whose loyalties remain unclear until the final reveal.
Ella-Rae Smith as Loraine Wade
Loraine is Gerry’s sister, whose unexpected arrival at crucial moments raises Bundle’s suspicions. Is she genuinely concerned about her brother’s death, or does she know more than she’s revealing? Smith keeps audiences guessing throughout.
Josef Davies as Alfred
Davies portrays Alfred, an employee at the Seven Dials nightclub who previously worked at Chimneys estate. His appearance—gun in hand, demanding Bundle accompany him—marks a turning point in the investigation, leading to the series’ most shocking revelations.
Mark Lewis Jones and Dorothy Atkinson as Sir Oswald and Lady Coote
Jones and Atkinson play the wealthy couple renting Chimneys for their house party. Sir Oswald’s fascination with Dr. Matip’s revolutionary metal alloy places him at the center of the espionage plot, while Lady Coote navigates high society with varying success.
Nyasha Hatendi as Dr. Cyril Matip
Hatendi portrays the inventor whose advanced metal alloy becomes the prize everyone is willing to kill for. His Dr. Matip represents the brilliant minds whose creations make them targets in the dangerous world of international espionage.
Why This Cast Works
The genius of Seven Dials casting lies in its balance—established stars like Freeman and Bonham Carter provide gravitas and drawing power, while McKenna-Bruce and Bluemel represent exciting rising talent. Together, they create a believable 1920s world where glamorous parties hide deadly secrets, and nobody is quite who they seem.
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