Masterpiece PBS has renewed The Marlow Murder Club for a fourth season.

Season 4 will be based on Robert Thorogood’s novel Murder on the Marlow Belle, along with new original mysteries. Filming is set to begin shortly in Marlow and surrounding areas.

Returning cast includes Samantha Bond (Judith Potts), Cara Horgan (Becks Starling), Jo Martin (Suzie Harris) and Natalie Dew (DI Tanika Malik).

The new six-episode season begins with the discovery of a body in the river that is soon linked to the Marlow Amateur Dramatics Society and a homegrown Hollywood star. The team must also unravel the truth behind a man’s sudden death at his mother’s wake. He appears to have died from an allergic reaction, but is there more to it than that? And when the co-owner of a vineyard is found dead, drowned in his own wine, the women work to make sense of this seemingly unmotivated murder. Can the amateur sleuths navigate the family scandals and personal betrayals to unmask the killers in their close-knit community?

Series regulars Holli Dempsey, Phill Langhorne and Tijan Sarr also return for Season 4.

Alison Owen, Debra Hayward, Alison Carpenter, Amira El-Nemr and Jill Forbes executive produce for Monumental Television. The series will be produced by Serena Cullen. Thorogood also serves as an executive producer alongside Steve Barron who will be returning to direct the first four episodes. Susanne Simpson is the executive producer for Masterpiece.