Marlow Murder Club Season 3: First Look with Peter Davison, Sarah Alexander, & Alistair MacKenzie
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Marlow’s favorite sleuthing trio is not done yet. The next chapter of The Marlow Murder Club is on the way, and if you like village-set mysteries where civilian insight keeps pace with official police work, this new run should be on your radar.
What Season 3 Brings
The new season tells three self-contained cases across six episodes, each built around the show’s familiar rhythm: a shocking death in a very public setting, a tight circle of suspects with competing alibis, and an investigation that moves between the High Street, the Thames, and the quieter corners of Buckinghamshire. By now Judith Potts, Suzie Harris, and Becks Starling are no longer curiosities to the local police. DI Tanika Malik has learned that the club’s local knowledge and willingness to ask awkward questions can shortcut weeks of procedure.
Expect motives that hide in everyday routines, timelines that look airtight until they are not, and a couple of set pieces that pull the team away from Marlow and into nearby institutions where status matters as much as truth.
Who Is Back, and Who Is New
Samantha Bond (Downton Abbey), Jo Martin (Doctor Who), and Cara Horgan (Traitors) return as Judith, Suzie, and Becks, with Natalie Dew (The Capture) back as DI Tanika Malik. Season 2 regulars and recurring characters pick up where they left off inside Tanika’s team and around town, keeping continuity for the club’s growing circle of allies and skeptics.
Guest stars across the season include Nigel Harman (EastEnders), Peter Davison (Doctor Who), Jacqueline Boatswain (Death in Paradise), Sarah Alexander (Coupling), Tony Gardner (Last Tango in Halifax), Jason Merrells (Emmerdale), Harry Enfield (The Windsors), Cherie Lunghi (Secret Diary of a Call Girl), Adrian Lukis (Pride and Prejudice), and Alastair Mackenzie (Monarch of the Glen).
Behind the scenes, the writing is shared across the six episodes to keep each case distinct while holding the tone steady. Creator and novelist Robert Thorogood is involved in the opening case, with Daniel Rusteau, Amy Reith, and Julia Gilbert contributing across the run. Monumental Television produces in partnership with U&Originals and Masterpiece, with ITV Studios handling distribution.
From Page to Screen: The Books Behind the Show
- The Marlow Murder Club introduces Judith, Suzie, and Becks, and begins with a gunshot on the river. What looks like a simple case forces the town to reveal who actually knows whom, and why that matters when statements go on the record.
- Death Comes to Marlow centers on a sudden death at a celebration that should have been routine. The question is whether an accident could have happened within the tight event schedule, or whether someone used the timetable as cover.
- The Queen of Poisons opens with a collapse at a council meeting and points the club toward methods that do not leave obvious marks. The investigation tests how public roles can hide private pressure, and how small grievances can scale.
- Murder on the Marlow Belle takes the action onto the water during a party aboard a riverboat. A disappearance turns into a broader look at alibis, staged moments, and the ways a performance can distract from what matters.
The adaptations lift character dynamics and a sense of place from the books rather than mapping one to one, which keeps the show free to shape each case for television while preserving the club’s voice.
When and Where to Watch
Season 3 is set to premiere in 2026 in the U.S. on PBS with Masterpiece, but we won't know a specific date until closer to launch. You can watch seasons 1 and 2 HERE.
