‘The Marlow Murder Club’ Season 3: Returning Characters & Guest Stars Revealed

Robbie Gray/Courtesy of Courtesy of Monumental Television, UKTV, and Masterpiece.

How many episodes will The Marlow Murder Club Season 3 be?

Per a PBS press release, Season 3 will feature “three gripping new murder mysteries told across six episodes.” Daniel Rusteau cowrote the first two episodes of Season 3 with the author of The Marlow Murder Club book series, Robert Thorogood. Amy Reith serves as the writer for Episodes 3 and 4, while Julia Gilbert penned the final two episodes of the season.

What will happen in Season 3 of The Marlow Murder Club?

“Now an established part of newly promoted DI Tanika Malik’s crime solving gang, retired archaeologist Judith Potts, dog walker Suzie Harris, and vicar’s wife Becks Starling are back and bringing their unconventional methods to a string of high-profile murders,” the logline for Season 3 reads. “From the sudden death of the town’s beloved mayor – the nicest man in Marlow – 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.”

The description continues, “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?”

Which cast members will return for Season 3 of The Marlow Murder Club?

Bond, Martin, and Horgan will all return as Judith Potts, Suzie Harris, and Becks Starling, respectively, along with Natalie Dew as DI Tanika Malik. The new episodes will also see the return of several Season 2 guest stars, including Hugh Quarshie as Professor Darius Gifford, Phill Langhorne as DC Brendan Perry, Holli Dempsey as DC Alice Hackett, and Tijan Sarr as DC Jason Kennedy.

Robbie Gray/Courtesy of Courtesy of Monumental Television, UKTV, and Masterpiece.

Who will guest star on Season 3 of The Marlow Murder Club?

Nigel Harman will guest star as Marcus in Episodes 1 and 2, along with Peter Davison as Geoffrey, Jacqueline Boatswain as Debbie, Sarah Alexander as Sophia, Tony Gardner as Terrence, and Jason Merrells as Paul.

Episodes 3 and 4 will feature Harry Enfield as Hector. Episodes 5 and 6, meanwhile, will guest star Cherie Lunghi, Adrian Lukis, and Alastair Mackenzie as Marian, Matthew and Ferdy, respectively.

The Marlow Murder Club, Season 3 Premiere, 2026, PBS (Seasons 1 and 2, Now Streaming on PBS, PBS Masterpiece, and Prime Video)