The hit crime-drama is once again co-commissioned with co-producer and US broadcaster MASTERPIECE, and produced by Monumental Television in association with ITV Studios.

The new stories will reunite the cast of Samantha Bond, Jo Martin, Cara Horgan and Natalie Dew, amongst other series regulars such as Holli Dempsey, Phill Langhorne and Tijan Sarr, for another “captivating instalment of intrigue, wit and mystery-solving.”

Filming is currently underway for the six-part series. Episodes one and two will be co-written by Daniel Rusteau and two-time Sunday Times Best Seller Robert Thorogood, and will be an adaptation of Thorogood’s third book Queen of Poisons. Plus Amy Reith will write episodes three and four, and Julia Gilbert writes episodes five and six.

Now an established part of newly promoted DI Tanika Malik’s (Natalie Dew) crime solving team, retired archaeologist Judith Potts (Samantha Bond), dog walker Suzie Harris (Jo Martin) and vicar’s wife Becks Starling (Cara Horgan) are back and bringing their unconventional methods to a string of high-profile murders. From the sudden death of the nicest man in Marlow, the town’s beloved Mayor, to a celebrity chef found dead at the launch of his cookbook with half the town in attendance, the team will be working under the watchful eye of the Marlow community. They’ll also be called to action at a university reunion in an eerie manor house where in a surprising twist, Becks finds herself amongst the suspects. Could this case threaten our amateur sleuths’ roles as civilian advisors?

The Marlow Murder Club S3 has been commissioned by Claire Hookway, commissioning executive for UKTV, and ordered for U&DRAMA by Emma Tibbetts, director of programming for drama, and Hilary Rosen, director of commissioning. Executive producers for Monumental Television are Alison Owen, Debra Hayward, Alison Carpenter, Sophie Clarke-Jervoise and Jill Forbes, and Susanne Simpson is executive producer for MASTERPIECE. The series will be produced again by Serena Cullen, and Robert Thorogood also serves as an executive producer alongside Steve Barron who will also be returning to direct the first four episodes, with Katherine Churcher directing episodes five and six.

Claire Hookway said: “Following the huge success of the first two series, we’re thrilled to return with another instalment where Judith, Suzie, Becks, and our police team are faced with three puzzling new mysteries to solve. We’re excited to treat the audience to more joyous fun in the beautiful town of Marlow, with many surprises and clever twists in store.”

Emma Tibbetts added: “We cannot wait to bring viewers a third series of The Marlow Murder Club. Audiences have truly embraced this charming crime drama, and it’s a joy to continue the journey with our much-loved characters. It promises even more surprises, wit, and the irrepressible sleuthing trio that fans have come to adore.”

Debra Hayward, Monumental co-founder, said: “We’re so proud of The Marlow Murder Club, and delighted that audiences are continuing to enjoy our team of brilliant women as they solve the crimes dreamed up by our fantastic writing team. We couldn’t be happier to be welcoming back our cast, directors, producer and crew as we return to Marlow for another glorious summer.”

Susanne Simpson, executive producer for MASTERPIECE added: “It’s a thrill to bring a third season of The Marlow Murder Club to our US audience. I know our viewers are looking forward to more of the heart and humour that makes this series so special.”

The Marlow Murder Club S3 is a new U&Original commission and will be available on U and U&DRAMA in 2026. Monumental Television is part of ITV Studios, who will handle international distribution.