What happens (spoiler-free)
Susan’s questions bring her closer to the people responsible for maintaining Miriam Crace’s reputation. Eliot, meanwhile, grows harder to reassure or advise. An invitation to a family commemoration promises an uncomfortable meeting between private memories and a carefully managed public image.
Pünd and Vassilikos pursue the origin of the poison in Corfu. A witness offers a description, but travel times and another account complicate the apparent answer. Clothes, a hotel room and a lunch appointment become pieces of the same timetable. Susan faces a less orderly problem: the people she interviews disagree about what happened long ago, and Eliot wants to make his version public now. The episode rewards attention to the difference between remembering an event, interpreting it and repeating an accusation with confidence.
For Susan, the practical problem is how to help a writer whose professional future depends on material that upsets everybody around him. For Pünd, it is how to distinguish a convincing description from a conclusive identification. Those questions keep the episode moving even when one strand appears to offer a clearer suspect than the other.
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Who’s in this episode
Susan Ryeland
Played by Lesley Manville.
Atticus Pünd
Played by Tim McMullan.
Eliot Crace
Played by Jamie Blackley.
Jonathan Crace
Played by Rupert Penry-Jones.
Roland Crace / Robert Waysmith
Played by Harry Lloyd.
Achilles Vassilikos
Played by Zubin Varla.
Harry Lloyd’s Roland Crace and Robert Waysmith are particularly useful names to keep apart. Roland belongs to the family Susan is meeting; Robert belongs to the family Pünd is questioning. Rupert Penry-Jones’s Jonathan is concerned with the Crace legacy in the contemporary world. Jamie Blackley’s Eliot is concerned with the story he wants to tell about that family, creating a conflict that cannot be settled simply by revising a sentence. Meanwhile, Tim McMullan and Zubin Varla develop the working partnership between Pünd and Vassilikos as they compare physical clues with what witnesses say.
Where it was filmed
Filmed for the series in Corfu, London and Dublin. Corfu supplies the setting for Pünd’s 1955 mystery. Explore the filming-location guides.
Clues to watch for
- The buyer’s clothing, white hair and distinctive smell.
- The times attached to the market purchase and restaurant lunch.
- Objects left behind at the Hotel Poseidon.
- The family’s different accounts of the children’s mixture.
- What Eliot chooses to reveal in his radio interview.
Recap (spoilers)
Jonathan warns Susan against damaging Miriam’s reputation. The foundation has valuable commercial plans, and her questions are unwelcome. Roland is more approachable, but disputes Eliot’s belief about their grandmother: the children’s mixture, he says, was never drunk. Susan also discovers a discrepancy between Jonathan’s account of Miriam’s will and Dr Lambert’s claim to have inherited money.
In Corfu, a seller remembers a white-haired man buying aconitine at noon. His clothes and apparent nationality suggest Elmer, yet Robert places his father at lunch elsewhere an hour later. Pünd and Vassilikos investigate a hotel room registered under another name. A newspaper, shoe polish and discarded clothes contribute to the growing case; a possible journey by boat changes their thinking about the timetable.
Pünd’s illness interrupts the investigation. The detectives also discuss their wartime experiences, challenging Vassilikos’s initial assumptions about his German colleague. Their working relationship becomes warmer just as the physical case seems to be narrowing.
Eliot publicly accuses someone of murdering Miriam during a radio interview. His marriage is also in crisis: Gillian is pregnant by another man, and Susan finds Eliot distressed at his club. At the commemoration, she meets more relatives before Eliot seizes the microphone and announces that the killer is present. He dismisses Susan as his editor when she intervenes. After leaving the gathering, he is struck by a car.
The ending changes the consequences of a literary accusation. Up to this point, the manuscript threatens reputations and family arrangements; now the author himself is in immediate danger. The neatness of the clues in Corfu is especially unsettling beside the disorder surrounding their creator.
The material found in the hotel room is persuasive partly because it appears to join several independent observations. A description from a seller, the timing of a meal and objects left behind can seem to reinforce one another. Pünd still has to establish whether they describe the same person’s movements. The proposed boat journey matters because an alibi depends on routes as well as clocks. Susan faces a related problem in a less measurable form. Roland’s reassurance and Eliot’s conviction concern the same childhood event, yet they give it radically different significance. Jonathan’s commercial concern supplies a reason to suppress a scandal, but it does not tell Susan whether the scandal is true. By the time Eliot speaks at the commemoration, a private belief has become an accusation before witnesses. Susan’s attempted intervention cannot restore the control over his words that she has as an editor. The collision then leaves her with both an unfinished professional relationship and an urgent real-world crisis.
Book vs TV (book spoilers)
- The largest change is geographical. The novel sends Pünd to southern France. Television places this case in Corfu. That gives the villa and its surroundings a different look.
- Both versions use a continuation novel called Pünd’s Last Case. Eliot takes responsibility for another writer’s detective. Susan brings editorial experience from Alan Conway’s earlier books.
- An actor can appear in both worlds. That makes the connections visible on screen. Distinguish a casting choice from a plot change. Recognising an actor does not prove Eliot’s portrayal is accurate.
The book handles this differently. Read or listen to Marble Hall Murders.
Where to watch
UK: check BBC iPlayer for Marble Hall Murders.
US: PBS lists Marble Hall Murders, with Passport access indicated. Check the service’s terms for your location.
PBS listing checked 19 October 2026.
Read the books
Marble Hall Murders
Anthony Horowitz’s novel behind the television adaptation.
Waterstones · print Audible · audiobookExplore Marble Hall Murders
Who plays who · Filming locations guide
Characters
Where it was filmed
PBS presentation
The US PBS listing records 53:05 (minutes:seconds), aired 2026-09-20. This is the PBS presentation length; the BBC edit may differ. PBS episode and transcript. Checked 19 October 2026.

