Case file · Series 11, Episode 5 · Season 11, Episode 5
The Magician's Nephew
A children's magic-show assistant is poisoned as an occult dispute gathers around an exceptionally rare book.
The 60-second case card
Should I watch this one?
Stage illusion and occult conviction produce an atmospheric case in which misdirection is both craft and worldview.
- Best for
- Stage magic · Occult book · Rare poison
- Mood
- Eccentric
- Team
- DCI Tom Barnaby with DS Ben Jones
- Spoiler guidance
- Read the premise freely; open the marked sections only after watching. Check the linked provider advisory for further viewing information.
Why it matters
Stage illusion and occult conviction produce an atmospheric case in which misdirection is both craft and worldview.
During a children's magic show, an assistant collapses after exposure to poison associated with an Ecuadorian frog. The investigation reaches Ernest Balliol, an enthusiastic occultist, and writer Aloysius Wilmington, whose scepticism has made their rivalry part intellectual combat and part personal feud.
A rare occult volume becomes a focal point as further deaths follow. Barnaby and Jones test supposed supernatural forces against access, performance technique and ordinary acquisitiveness, while the magician's equipment repeatedly demonstrates how easily attention can be steered away from the important action.
Break the seal: reveal the finding
The occult signs are deliberate theatre. The rare book, a disputed family connection and the practical mechanics of the magic act lead Barnaby to the person exploiting belief as cover.
Spoiler-safe viewing companion
Three questions to carry into the episode
Use these spoiler-safe prompts to notice the setting, the investigation and the details that may matter.
- Place
How does Midsomer County shape what people say openly, delay, or leave unsaid?
- Theme
Which details seem to carry more than one meaning, and what might be a red herring?
- Teamwork
Compare how DCI Tom Barnaby and DS Ben Jones gather information: who watches the room, and who presses the conversation forward?
More episode detailsProduction, cast, deaths and filming information
Credits, context and checked facts
Production and cast
- TV series
- Series 11
- Episode number
- Episode 5
- Written by
- Michael Russell
- Directed by
- Richard Holthouse
- Listed transmission date(s)
- 14 June 2008 27 July 2008
- Reported filming period
- November–December 2007
- Detective
- DCI Tom Barnaby
- Partner
- DS Ben Jones
- Pathologist
- Dr George Bullard · Barry Jackson
- Principal setting
- Midsomer County
- Casebook tone
- Eccentric
Check the credits, then follow the source trail for production and filming details. Counts below describe this archive’s records.
The fictional setting and the real filming sites are separate pieces of information. The location desk currently connects it to 2 broader filming areas and 3 exact on-screen site identities.
Credits and archive connections
- Writer credits5 episodes credited to Michael Russell
- Director credits16 episodes directed by Richard Holthouse
- Release positionCase 64 of 144
- Story characterEccentric · Stage magic · Occult book
- Location evidence3 exact screen-use matches
Englefield House in Berkshire represents the author's imposing family home.
Nettlebed Village Hall supplies the stage and community interiors for the children's performance.
Sources for the production file
Published episode chronology and credits ↗Official ITV programme page ↗Filming-location reference index ↗The chronology is the reference for the credits shown here. A programme homepage does not independently verify a filming date or every production detail. Where multiple transmission dates are listed, territory attribution needs checking. Story, teleplay and adaptation distinctions require the original credit wording; links to external synopses may reveal plot details.
Selected episode credits
The Magician's Nephew cast
These selected cast entries link to their published profiles. They do not include every name shown in the end credits.
Jane Wymark
Laura Howard
Kirsty Dillon
Tom Goodman-Hill
Siân Brooke
Angela Rippon
Dominic Rowan
Michael Fitzgerald
Brigit Forsyth
Stuart Wilson
Rachel Pickup
Ronald Pickup
David Roper
Rosemary McHale
Bill Thomas
James Staddon
Kate Crutchley
Olivia Thomas
Vivien Heilbron
The performers behind this case
Core cast
Actor profiles for the detective, investigating partner and pathologist credited to this episode.
John Nettles
Tom Barnaby · Detective Chief InspectorAn English actor, author and narrator who was already a household name as Jersey detective Jim Bergerac. After Bergerac he spent five seasons with the Royal Shakespeare Company and later returned to television drama in Poldark.
- Bergerac
- Poldark
- Royal Shakespeare Company
Jason Hughes
Ben Jones · Police Constable · Detective Sergeant · InspectorA Welsh actor who first became widely known as Warren Jones in the BBC drama This Life. His later television work includes Marcella and The Pact, alongside substantial theatre work at venues including the Donmar Warehouse and Royal Court.
- This Life
- Marcella
- The Pact
Barry Jackson
Dr George Bullard · Police pathologistAn English stage and screen character actor whose career lasted more than five decades. His credits ranged from the landmark television play Cathy Come Home to Doctor Who, Barry Lyndon and many familiar British television dramas.
- Cathy Come Home
- Doctor Who
- Barry Lyndon
Portraits are used only where a reusable licence or public-domain release has been verified. Publicity stills and stock photographs are not copied into this independent guide.
Forensic desk
Dr George Bullard
- Credit
- Resident pathologist
- Played by
- Barry Jackson
Causton's long-serving pathologist is professionally unflappable, quietly witty and an old friend of Tom Barnaby.
Meet the Casebook pathologists →Spoiler-controlled deaths desk
Deaths recorded in this case
4 people die in this case, according to the linked death record.
Break the seal: reveal the death ledger
- Jean Wildacre
Murder · Poisoning
Performer check- Jean Wildacre: Kate Crutchley
- Hugo Cartwright
Murder · Poisoning
Performer check- Hugo Cartwright: Michael Fitzgerald
- Aloysius Wilmington
Murder · Poisoning
Performer check- Aloysius Wilmington: Stuart Wilson
- Tristan Balliol
Accidental, natural or other · Poisoning
Performer check- Tristan Balliol: Tom Goodman-Hill
Break a second seal: reveal the verified killer
Verified killers
Isolde Balliol · Tristan BalliolIsolde poisoned Hugo Cartwright while searching for the supposed occult book. Tristan poisoned Jean Wildacre and Aloysius Wilmington in revenge for their part in his mother's breakdown, then died after accidentally exposing himself to the poison he intended for Ernest Balliol.
Verified motive
Isolde believed the occult book could restore her mother's sanity and killed Hugo while pursuing it, although she said she had not intended his death. Tristan separately sought revenge on the people whose Temple initiation had driven his mother into a lasting psychotic breakdown.
Verified important clue
Archive case 64 · checked 16 September 2026The Temple initiation diagram linking J, H and AThe diagram pairs Jean, Hugo and Aloysius with the ritual weapons used at their deaths and places Estelle outside the centre; reconstructing that ceremony identifies Rosemary as the missing central figure and reveals the family grievance behind the poisonings while leaving Isolde's separate book hunt distinct.
Verified decisive clue
Archive case 64 · checked 17 September 2026The Temple initiation diagram linking J, H and AThe diagram pairs Jean, Hugo and Aloysius with ritual weapons and places Rosemary at the hidden centre of the old ceremony. Reconstructing it exposes Tristan's revenge against Jean and Aloysius while the poison-frog evidence separates Isolde's search-driven killing of Hugo and Tristan's accidental death during the attempted final poisoning.
Verified death and discovery order
Archive case 64 · checked 16 September 2026- discoveryThe Temple initiation damages Rosemary
The earlier occult ceremony causes Rosemary's lasting breakdown and supplies the grievance behind the later poisonings.
- deathJean Wildacre is poisoned
Tristan begins taking revenge on the people he holds responsible for his mother's breakdown.
- deathHugo Cartwright is poisoned
Isolde separately kills Hugo while searching for the supposed occult book that she believes can restore Rosemary.
- deathAloysius Wilmington is poisoned
Tristan continues the revenge sequence against another participant in the Temple initiation.
- discoveryThe poison frogs divide the two offenders
Evidence from the Ecuadorian frogs and the supposed book distinguishes Isolde's killing from Tristan's planned series.
- deathTristan dies during the attempted final poisoning
Tristan accidentally exposes himself to the poison intended for Ernest Balliol, leaving Ernest alive and Tristan's death accidental.
Real place → fictional identity
What was filmed where?
Englefield House
Used as: The country house represents Aloysius Wilmington's family home.
Antique bookshop and The George Inn
Used as: The neighbouring businesses provide the rare-book shop and inn exteriors.
Nettlebed Village Hall
Used as: The hall becomes the venue for the children's magic show.
Representative photograph of the real filming location; the exact camera angle or building may differ.Sources support the listed site uses; they do not establish every filming location in an episode.
Wider filming areas
Places connected to this file
Henley-on-Thames
Its river, bridge, town hall and nearby Remenham and Harpsden locations lend themselves to clubs, courts and prosperous settings.
Open location →Nettlebed
The village and its Crocker End hamlet have doubled for greens, halls, pubs and festival settings.
Open location →