David Tennant has joined the recurring cast of Only Murders in the Building season 6, and the move comes as production gets underway in the UK. The series is leaving New York City for London, its first season shot outside the U.S.
Nicola Coughlan, Jodie Whittaker, Jim Broadbent, Richard Ayoade, Adrian Lukis and Kathryn Hunter are joining Tennant in the recurring cast, giving the show a concentrated British lineup for the new run. For a series built around Charles, Oliver and Mabel chasing a fresh mystery, the location shift is now part of the story, not just the backdrop.
London becomes the setting
Season 6 sends the crime-solving trio out of New York City and into London, where the new mystery is set. That makes the production move more than a change of scenery; it is the first time the comedy mystery has ventured beyond the U.S., and the cast additions match that decision with performers who bring their own television and film histories to the show.
Tennant arrives with one of the most recognizable roles in British television behind him, having played the Tenth Doctor and the Fourteenth Doctor on Doctor Who. He also currently stars as Tony Baddingham in Rivals, made a key cameo in the season 2 finale of The Four Seasons, and appeared in The Thursday Murder Club.
Whittaker and Broadbent
Jodie Whittaker joins after making history as the first woman to portray the Doctor in Doctor Who, a role she took over from Peter Capaldi in 2017 and led across three seasons and several specials. Her most recent credits include Office Romance alongside Jennifer Lopez and Brett Goldstein, plus the ITV series Frauds.
Jim Broadbent adds another familiar screen presence to the season after winning the Best Supporting Actor Oscar for Iris in 2001 and later taking an Emmy for The Street. He is also one of the few actors in the cast with direct Doctor Who overlap: he played the Eleventh Doctor in The Curse of Fatal Death spoof and other special broadcasts, even though he never played the Doctor in the official series.
Three seasons, one new market
Richard Ayoade, whose television work includes his BAFTA-winning turn as Maurice Moss in The IT Crowd, is also on the season 6 roster, alongside Adrian Lukis and Kathryn Hunter. Ayoade was recently seen in The Phoenician Scheme and The Wonderful World of Henry Sugar, and he is set to join the voice cast of Sonic the Hedgehog 4.
For the show, the London shoot brings together two Doctor Who figures, two Harry Potter stars, and a wider group of British performers in a single season. That is a practical signal about where the series is going next: a New York mystery with a London production footprint, and a cast built to match it.
