Star-Studded London Mystery
Only Murders in the Building Season 6 Heads to London, Unveiling 20-Star Guest Cast
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Key Points
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Showrunner John Hoffman teased that the Season 6 “10-episode arc” will center on Cinda Canning and the “baggage tied to England” left behind after the Season 5 finale’s on-screen murder.
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The series’ guest-star rollout has been described as unusually large—one report says Hulu has expanded the recurring guest roster to “an absolutely massive 20 actors” for Season 6.
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Multiple additional British/Irish actors round out the London roster beyond Tennant/Whittaker/Coughlan, including Jim Broadbent, Richard Ayoade, Adrian Lukis and Kathryn Hunter (all named as joining Season 6).
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Nicola Coughlan also personally commented on the casting: she wrote on Instagram, “The nicest summer job I’ve ever had including that one year I sold sweets from a shed!!”
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The show’s social media announcement used a case-file framing, posting: “Keep calm and update the case file. David Tennant, Nicola Coughlan, Jodie Whittaker, Jim Broadbent, Richard Ayoade, Adrian Lukis and Kathryn Hunter have joined the Season 6 cast of #OMITB.”
Hulu's *Only Murders in the Building* is taking its podcast trio across the Atlantic for Season 6, and it's bringing an enormous cast along for the ride. The TV Cave reports that the show has added 20 new recurring guest stars for its London-set mystery — the largest guest roster in the series' history.
The headline names include David Tennant, Jodie Whittaker, and Nicola Coughlan, alongside Jim Broadbent, Richard Ayoade, Simone Ashley, Adrian Lukis, and Kathryn Hunter. Production is already underway in the UK, with the season set to return in 2026.
Two Doctor Who Stars Land in the Same Season
The casting of David Tennant and Jodie Whittaker in the same season is drawing major attention. Both actors are former leads of *Doctor Who*, the long-running BBC sci-fi series. Daily Record notes that Tennant, 55, is among the most recognizable faces in British television. Having both stars appear together is being seen as a coup for Hulu's international ambitions.
The show's official social media account framed the news with a case-file style post: "Keep calm and update the case file. David Tennant, Nicola Coughlan, Jodie Whittaker, Jim Broadbent, Richard Ayoade, Adrian Lukis and Kathryn Hunter have joined the Season 6 cast of #OMITB." The announcement drove the hashtag #OMITBLondon to trend on X for 12 hours.
Cinda Canning's British Secrets Drive the Plot Abroad
The London move is not just a location change. Showrunner John Hoffman says the 10-episode season will dig into "baggage tied to England" left behind after the Season 5 finale. The finale aired on October 21, 2025, and ended with an on-screen murder connected to Cinda Canning's media empire. That death, involving a whistleblower from a British tabloid Canning once owned, points Charles, Oliver, and Mabel straight to the UK.
Tina Fey's Cinda Canning serves as the bridge between the New York story and the London case. For the first time, the core trio — Steve Martin, Martin Short, and Selena Gomez — is investigating outside the Arconia building entirely. The shift follows a smaller test run when the show briefly left New York for Los Angeles in Season 4.
Nicola Coughlan Called It Her Nicest Summer Job Ever
Nicola Coughlan, best known for *Bridgerton*, confirmed her casting in a very personal way. She wrote on Instagram: "The nicest summer job I've ever had including that one year I sold sweets from a shed!!" Her post confirmed she had wrapped her main filming block. Insiders describe her character as a "chaotic podcast superfan" who helps the trio break into the British true-crime scene.
Simone Ashley, also from *Bridgerton*, rounds out a roster heavy with British and Irish talent. KVP Online notes that Jim Broadbent is also among the additions, with reports suggesting he plays a "shady aristocrat" with ties to Charles's family history. The sheer size of the guest list — 20 actors — is unprecedented for the show.
A $15 Million Budget and a Franchise-Changing Gamble
The London production comes with a hefty price tag. Per-episode costs are estimated above $15 million, driven by international logistics and top-tier talent fees. The UK's Audio-Visual Expenditure Credit — a tax rebate for high-end TV made in Britain — is helping offset those costs. Filming is taking place at Pinewood Studios and on location around London, including sightings near Covent Garden.
Not everyone is cheering. Some critics warn that 20 recurring guest stars could crowd out the core trio. Others argue the show risks losing what made it work — the tight, claustrophobic world of one New York apartment building. But if Season 6 succeeds, it could set a new model: the trio traveling to a fresh city each season, with a new all-star cast each time.
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