Mark Gatiss Returns to PBS with Darkly Witty Mystery 'Bookish' – All the Details on His Post-War London Noir

The Master of Mystery Returns

Mark Gatiss, the Olivier and Emmy Award-winning actor, writer, and producer, is swapping Baker Street for a dusty antiquarian bookshop. His latest brainchild, Bookish, is set to premiere on PBS on January 11, 2026, and the star power behind it promises to deliver a gripping, intelligently crafted murder mystery series. Gatiss, who co-created the global phenomenon Sherlock and left an indelible mark on Game of Thrones (as the sly Tycho Nestoris) and Doctor Who, now steps into the spotlight as both creator and lead.

The six-part series transports audiences to the shadowy, chaotic streets of post-war 1946 London. It’s a world still haunted by rubble, rationing, and the scars of conflict—a perfect setting for noir-infused crime. Gatiss plays Gabriel Book, an eccentric antiquarian bookshop owner whose encyclopedic knowledge of literature and history makes him an invaluable—if unconventional—consultant to the local police. The premise is pure catnip for fans of period mysteries: a brilliant mind solving puzzles while navigating a city rebuilding itself.

A Post-War London Noir

Gatiss’s Gabriel Book is no ordinary detective. He’s a man who lives among leather-bound first editions, crumbling manuscripts, and obscure historical footnotes. When the Metropolitan Police hit a dead end, they turn to Book, whose ability to connect a clue from a 19th-century novel to a modern murder feels almost supernatural. The show cleverly weaves three distinct cases across its six episodes, each one unfolding against the gritty backdrop of a city struggling for normalcy.

But the real mystery at the heart of Bookish isn’t the crimes—it’s the marriage of Gabriel and his wife, Trottie. Trottie runs the wallpaper shop next door, and the two have been best friends since childhood. Their relationship is described as “unconventional,” and early buzz suggests it’s a deeply intimate, emotionally complex subplot that could rival the main whodunnits. Is there a hidden tension? A shared secret? Fans of Gatiss’s previous work know he excels at layering personal drama into genre fare. From the tragicomic undertones of The League of Gentlemen to the fragile friendships in Sherlock, Gatiss never forgets the human element.

The Unconventional Marriage at the Core

Playing Trottie is the brilliant Polly Walker, best known for her roles in Bridgerton (as the scheming Lady Portia Featherington) and Line of Duty. Walker brings a perfect blend of steel and warmth, making her the ideal foil to Gatiss’s scholarly, slightly melancholy Gabriel. Their dynamic—two people who know each other impossibly well yet still harbor hidden depths—is set to anchor the series emotionally.

Early press materials hint that their marriage is not typical. “They’re collaborators, conspirators, and sometimes competitors,” says Gatiss in a recent interview. The show seems poised to explore whether love and friendship can survive the weight of secrets and the sharp edges of everyday life. It’s a refreshingly adult angle for a mystery series, and one that could draw comparisons to the marital tension in The Crown or Downton Abbey.

A Stellar Supporting Cast

Beyond the central duo, Bookish assembles a formidable ensemble. Rising star Connor Finch (from Everything I Know About Love) plays Jack, a young assistant whose loyalty may be tested. Elliot Levey (Quiz, We Were the Lucky Ones) takes the role of the stern but increasingly reliant Inspector Bliss, while Blake Harrison (World on Fire), fresh off his turn in the hit comedy Still Up, portrays Sergeant Morris. Buket Kömür (Our House) rounds out the cast as Nora, a character whose mysterious past may be tied to the first case.

This kind of casting—a mix of established stage performers and fast-rising TV actors—is a hallmark of Gatiss’s projects. He knows how to create chemistry on screen, and early set photos show a cast clearly enjoying themselves amidst the cobblestones and fog machines. The series is directed by Carolina Giammetta, whose previous work includes sleek, character-driven dramas, and co-written by Gatiss and historian Matthew Sweet, ensuring the period details feel authentic.

When and Where to Watch

Bookish premieres on PBS on Sunday, January 11, 2026, at 10/9c, with new episodes weekly through February 15. For binge-watchers, all six episodes will drop on PBS Passport the night of the premiere—a move that capitalizes on the streaming appetite. The series will also be available on the PBS app and on PBS Masterpiece via Prime Video. This is a major push from PBS, signaling confidence in the show’s cross-platform appeal.

If the early buzz is anything to go by, Bookish could become the next must-watch period mystery—part Father Brown, part Sherlock, but with a distinctly literary, post-war soul. Gatiss has always had a knack for making intellectualism feel thrilling. Here, he seems to be exploring the idea that the greatest mysteries are not in books, but in the hearts of the people who read them.

What the Fans Are Saying

The announcement sent social media into a mild frenzy. Fans of Gatiss’s earlier work—particularly his chilling performance as Mycroft Holmes and his hilarious yet menacing turns on Doctor Who—are eager to see him take center stage. Hashtags like #BookishPBS and #GatissMystery trended briefly on X (formerly Twitter) within hours of the press release. The consistent comment? “Finally, a leading role that lets Gatiss show off his full range: wit, menace, and vulnerability.”

There’s also excitement for the historical setting. Post-war London is a relatively underexplored period in American TV mystery series, which have long favored the 1920s or 1950s. The unique challenges of 1946—austerity, trauma, and the beginning of the Cold War—offer rich soil for crime stories. The combination of Gatiss’s literary references (expect mentions of T.S. Eliot, Daphne du Maurier, and perhaps even pulp detective novels) and the grim reality of reconstruction promises a show that educates as much as it entertains.

The Bigger Picture

For Gatiss, Bookish represents a return to PBS after his celebrated work on Sherlock, which aired on PBS Masterpiece to massive ratings. It also marks a reunion with the network that has distributed many of his BBC projects stateside. In an era of franchise fatigue, Bookish stands out as an original concept—a passion project from a multitalented artist who has earned the freedom to gamble.

The show was produced by Eagle Eye Drama (the team behind The Suspicions of Mr. Whicher) and Happy Duck Films, in association with UKTV and Beta Film. This pedigree suggests high production values: expect moody cinematography, meticulously dressed sets, and a haunting score that evokes the era. If the preview clip is any indication, the show balances light and shadow as deftly as its protagonist balances logic and intuition.

All signs point to Bookish being that rare TV gem—a smart, stylish mystery with a beating heart at its center. Mark your calendars for January 11. Gabriel Book is about to become your new favorite detective.

Disclaimer - All celebrity-related content, information, and images on this website are based on publicly available online sources and AI-generated insights/data. Information such as biography, age, career, personal details, and images may change without notice over time. While we strive for accuracy, we do not guarantee the accuracy, completeness, reliability, or timeliness of any information or imagery displayed on this website. This content is provided for general informational purposes only.