MASTERPIECE The Marlow Murder Club, Season 3 Episode Three: "The Queen of Poisons: Part II" Sunday, September 13, 2026 at 8/7c on PBS As the suspects’ secrets stack up, Judith, Becks and Suzie still can’t find anyone with a motive to hurt the Mayor. What are they missing? Shown L-R: Shown (L-R): Judith Potts (Samantha Bond), Becks Starling (Cara Horgan), Suzie Harris (Jo Martin) For editorial use only. Courtesy of Courtesy of Monumental Television, UKTV, and MASTERPIECE.

Masterpiece

The Queen of Poisons: Part Two
The Marlow Murder Club Season 3

As the suspects’ secrets begin to stack up, the trio hits a frustrating wall: absolutely no one seems to have a clear motive for wanting the mayor dead. What important clues are they missing?
Air Date: Sun, Sep 13, 2026 7:00 PM