Who Sir Magnus Pye is
Sir Magnus Pye owns Pye Hall and exercises considerable influence over Saxby-on-Avon. His decisions about land and money affect people well beyond his own household. The grand house is therefore more than a picturesque backdrop: it is a centre of power that gives many villagers reasons to resent its owner.
Role in Magpie Murders
The proposed development of Dingle Dell brings his authority into direct conflict with local attachment to the landscape. Within the house, relationships are strained for more private reasons. Pünd’s inquiry has to move between those scales, asking which disputes are simply part of life around an unpopular landowner and which explain the violence that follows.
Key relationships
Clarissa Pye is his twin sister and an outspoken opponent of the development. Frederick Pye is his son. Mary Blakiston works in the household, while Jack Whiteley has another connection to the house that attracts attention. Atticus Pünd must reconstruct how these relationships intersect.
Played by Lorcan Cranitch
Lorcan Cranitch plays Sir Magnus Pye. Cranitch’s two roles are Max Ryeland and Magnus. Their different settings show how the same face can suggest a thematic connection without supplying an answer to either investigation.
Their story and fate — spoilers
Magnus is murdered, and Pünd eventually establishes that Robert Blakiston killed him while trying to recover Mary’s written disclosure about the death of Robert’s brother Sam. The violence is tied to a much older family secret. Magnus’s unpopularity creates numerous plausible motives, but the actual sequence depends on the letter, the search for it and Robert’s mistaken handling of the envelopes.
Books and television — book spoilers
Lorcan Cranitch also plays Max Ryeland in the television adaptation. Max belongs to Susan’s expanded family storyline, whereas Magnus belongs to Alan’s manuscript. The shared performer gives the audience a visual echo between powerful or damaging fathers. It does not turn the fictional murder into a direct account of Susan’s family history. The adaptation’s intercutting encourages comparison while preserving the different causes and consequences of each man’s actions.
Role in the story
Magnus belongs to Alan Conway's manuscript rather than Susan's contemporary investigation. That distinction matters if you recognise Lorcan Cranitch from the scenes involving Susan's father. Pye Hall is the centre of Magnus's authority: decisions made there affect relatives, employees and villagers, so Pünd encounters an unusually wide range of grievances around one household.
Dingle Dell gives those grievances a public focus. The proposed development is a question about the future of the village as well as a dispute within the Pye family. Other complaints concern how Magnus treats people with less power than himself. The detective has to examine both kinds of conflict without assuming that the loudest opposition must explain the crime. An unpopular victim supplies possibilities, not a ready-made answer.
Key scenes by episode
Follow the linked episodes as you watch. Open the scene notes when you want more detail.
Episode scenes (full spoilers)
Episode 2: Magnus’s murder brings Pünd to Saxby-on-Avon. The sword, opened safe and fire in mild weather ask practical questions about what happened inside the house. The earlier burglary and Mary’s death become part of the same inquiry.
Episode 3: Robert recalls Magnus supporting him after his father left. Brent gives a less favourable account of the landowner’s treatment of servants and Miss Darnley. Those different memories complicate a simple portrait of Magnus as either benefactor or bully.
Episode 4: The funeral brings the household and village together. Chubb reports that blood on the partly burned paper is consistent with Magnus’s blood group, making the document harder to dismiss as ordinary rubbish.
Episode 6: Robert killed Magnus while trying to recover Mary’s disclosure about Sam’s death. The staged burglary and the confusion over envelopes explain why a case surrounded by land disputes and money ultimately depends on an older family secret and a letter.
In the book
Book and screen comparison (book spoilers)
The television adaptation pairs Magnus with Max Ryeland. Max belongs to the expanded account of Susan's family, while Magnus remains inside Alan's detective novel. That casting invites a comparison between difficult fathers without creating a literal connection between the households. Their family histories remain separate. The visual echo can make a viewer think about how authority works in each household, but Susan's memories do not provide the explanation for what happens at Pye Hall.
What to notice on a rewatch (spoilers)
If you want to retrace Pünd's reasoning, start with the study rather than the list of enemies. Follow what has been removed, what has been burned and why the safe matters. Those practical questions gradually narrow the much larger collection of plausible motives surrounding Pye Hall.
Sources (checked 19 October 2026): PBS: Magpie Murders cast and characters, PBS: Magpie Murders, episode 2, PBS: Magpie Murders, episode 3, PBS: Magpie Murders, episode 6
Read or listen to the book
Magpie Murders (2016)
Anthony Horowitz’s novel behind the first television mystery.
Waterstones · print Audible · audiobookPaid links may earn commission, at no extra cost.
Lorcan Cranitch plays both Sir Magnus Pye and Max Ryeland, connecting the two story worlds.