David Tennant has been added to the recurring cast of Only Murders in the Building Season 6 as production gets underway in the United Kingdom.
Tennant is one of several British actors newly attached to the series; Nicola Coughlan, Jodie Whittaker, Jim Broadbent, Richard Ayoade, Adrian Lukis and Kathryn Hunter are also listed as recurring performers for the upcoming season.
The casting haul matters because Season 6 is the series’ first to be filmed and set outside the United States. Showrunners have sent the trio of amateur sleuths — Charles, Oliver and Mabel, played by Steve Martin, Martin Short and Selena Gomez — out of New York City to investigate a mystery in London, marking a clear production and setting shift for the show.
Tennant’s television résumé is familiar to many viewers: he is best known for playing the Tenth Doctor and the Fourteenth Doctor on Doctor Who and currently stars as Tony Baddingham in the Disney+ series Rivals. Whittaker, who also joins the season, was the first woman to portray the Doctor. Broadbent’s credits include Horace Slughorn in the Harry Potter franchise, and Ayoade won a BAFTA for his role as Maurice Moss in The IT Crowd.
While the announcement lays out a compact list of high-profile additions, it does not assign characters to the new cast. The specific roles Tennant, Coughlan, Whittaker and the others will play in Season 6 have not been revealed, leaving a central question about how the London setting will reshape the show’s mystery and which characters will complicate the trio’s investigation.
The move to London is the season’s most conspicuous change: after five seasons rooted in Manhattan, the show’s creators have opened a new playground of suspects and locations by shifting production to the UK. That change explains the concentration of British talent on the new cast list and creates a built-in contrast between the series’ New York-born leads and a fresh, London-centered supporting ensemble.
Production on Season 6 is currently underway in the UK, so viewers can expect further casting details and promotional material to appear as filming progresses. The next confirmed step is the continuation of production abroad and the eventual release of Season 6; until the creators disclose character names or a premiere window, the full shape of the London mystery will remain the season’s central unknown.
