Fans of brooding British detective dramas, rejoice: Dalgliesh is officially coming back for a fourth season. Acorn TV and New Pictures confirmed the renewal on May 18, 2026, ending a long wait that began after Season 3 wrapped in December 2024. But there’s a significant change in store — the series will no longer air on the U.K.’s Channel 5.
Instead, Dalgliesh Season 4 will premiere exclusively on Acorn TV across the U.K., U.S., and Canada. An exact premiere date hasn’t been announced yet, but the network has confirmed a 2027 window. The move to streaming-only marks a new chapter for the critically acclaimed show, which first debuted on Acorn TV in the U.S. on November 1, 2021, before landing on Channel 5 three days later.
Based on P.D. James’ best-selling novels and adapted by Helen Edmundson, Dalgliesh stars Bertie Carvel as the titular detective-poet, a widower who uses his empathy and sharp insight to solve complex murders in 1970s England. The series has earned a devoted following for its atmospheric storytelling and layered character work, often drawing comparisons to other beloved British crime dramas like Shetland and Death in Paradise.
“It’s a real pleasure returning to the world of Dalgliesh, brought to life by the brilliant Helen Edmundson and Bertie Carvel,” said Elaine Pyke, co-founder and creative director of New Pictures and executive producer of the series. Her enthusiasm reflects the show’s reputation as one of the more underrated entries in the genre — a slow-burn thriller that rewards patient viewers.
The ensemble cast has evolved over the seasons. Jeremy Irvine appeared as DS Charles Masterson in Season 1, while Carlyss Peer joined as DS (later DCI) Kate Miskin. Alistair Brammer played DS Daniel Tarrant in Seasons 2 and 3, and Claire Goose appeared as Dr. Emma Lavenham in Season 3. David Pearse rounds out the regulars as pathologist Miles Kynaston. It’s unclear which supporting characters will return for Season 4, but Carvel is confirmed to lead the new episodes.
For fans who love a good mystery, Dalgliesh fits perfectly alongside other psychological thrillers that reward repeat viewings. If you’re looking for more edge-of-your-seat storytelling, check out our list of Why These 8 Thrillers Only Get Better With Every Rewatch.
The renewal also underscores Acorn TV’s commitment to high-quality British crime programming. With the shift away from linear TV, the streamer is betting that Dalgliesh can thrive in a direct-to-audience model — much like other streaming-first hits. For those who prefer their spy thrillers with a geopolitical twist, ‘The Agency’ Season 2 Trailer Drops: Paramount+ Spy Thriller Returns June 2026 offers another binge-worthy option.
As the wait for Season 4 begins, now is the perfect time to catch up on the first three seasons. Whether you’re a longtime fan or a newcomer, Dalgliesh remains a masterclass in moody, intelligent detective fiction — and its return in 2027 promises more of the same gripping drama.
