Case file · Series 17, Episode 1
The Dagger Club
A newly discovered crime manuscript attracts collectors, gamblers and a killer apparently following its methods.
The 60-second case card
Should I watch this one?
A knowingly bookish mystery about authorship, ownership and the dangerous price placed on a dead writer's name.
- Best for
- Crime fiction · Lost manuscript · Collectors
- Mood
- Classic
- Team
- DCI John Barnaby with DS Charlie Nelson
- Spoiler guidance
- Read the premise freely; open the marked sections only after watching. This is not a complete content advisory.
Why it matters
A knowingly bookish mystery about authorship, ownership and the dangerous price placed on a dead writer's name.
A newly discovered crime manuscript attracts collectors, gamblers and a killer apparently following its methods.
Luxton Deeping's crime festival is electrified by news of a newly discovered manuscript from the late novelist George Summersbee. The document is stolen, and a woman is killed by a roulette-wheel trap that appears to turn the writer's fictional ingenuity into a real murder method.
Barnaby and Nelson investigate Summersbee's family, publishers, collectors and rivals while the festival trades eagerly on his reputation. Questions about who owns the manuscript gradually give way to the more important question of who actually created the work on which that reputation rests.
Break the seal: reveal the finding
The manuscript is both valuable bait and evidence of concealed authorship. Barnaby's solution depends on separating George Summersbee's public legend from the identities and creative work hidden behind his name.
Open the full research dossierProduction, cast, forensics, deaths and filming evidence
Credits, context and checked facts
The episode file
- TV series
- Series 17
- Episode number
- Episode 1
- Written by
- Chris Murray
- Directed by
- Alex Pillai
- Listed transmission date(s)
- 28 January 2015
- Reported filming period
- April–May 2014
- Detective
- DCI John Barnaby
- Partner
- DS Charlie Nelson
- Pathologist
- Dr Kate Wilding · Tamzin Malleson
- Principal setting
- Luxton Deeping
- Casebook tone
- Classic
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 1 broader filming area and 3 exact on-screen site identities.
Credits and archive connections
- Writer ledger6 episodes credited to Chris Murray
- Director ledger7 episodes directed by Alex Pillai
- Release positionCase 101 of 144
- Story characterClassic · Crime fiction · Lost manuscript
- Location evidence3 exact screen-use matches
The episode builds its case around a literary festival, a lost manuscript and people attempting to profit from a famous crime writer.
The old courthouse in Long Crendon appears as the episode's village bookshop.
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
Guest cast on file
Selected profiles and published cast-list entries. Database records are linked individually; this is not a full transcription or an independent check against the end credits.
Lia Williams
Published cast record ↗Simon Kunz
Published cast record ↗Kobna Holdbrook-Smith
Published cast record ↗James Lance
Published cast record ↗Una Stubbs
Published cast record ↗The performers behind this case
Core cast
Actor profiles for the detective, investigating partner and pathologist credited to this episode.
Neil Dudgeon
John Barnaby · Detective Chief InspectorAn English actor whose television work before Causton included Piece of Cake, The Mrs Bradley Mysteries, Messiah and the sitcom Life of Riley. He also appeared in Midsomer Murders years earlier as a different character in Garden of Death.
- Messiah
- Life of Riley
- The Mrs Bradley Mysteries
Gwilym Lee
Charlie Nelson · Detective SergeantA British actor whose screen career includes Jamestown, The Great and Top End Wedding. International audiences may know him best as Queen guitarist Brian May in the film Bohemian Rhapsody.
- Bohemian Rhapsody
- The Great
- Jamestown
Tamzin Malleson
Dr Kate Wilding · Police pathologistAn English actor whose best-known television work includes Dangerfield, Teachers, the medical drama Bodies and Unforgotten. She has also appeared in Poirot, Marcella and A Touch of Frost.
- Teachers
- Bodies
- Unforgotten
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 Kate Wilding
- Credit
- Resident pathologist
- Played by
- Tamzin Malleson
Bullard's assured, no-nonsense successor combines forensic authority with a more informal chemistry around the John Barnaby team.
Meet the Casebook pathologists →Spoiler-controlled deaths desk
Deaths recorded in this case
4 source rows represent 4 people in the current ledger.
Break the seal: reveal the death ledger
- Suzie Colebrook
Murder · Electrocution
- Cecilie Peterson
Murder · Electrocution
- Niall Colebrook
Murder · Crushing
- George Summersbee
Murder · Stabbing or impalement
Real place → fictional identity
What was filmed where?
Britwell Salome House
Used as: The country house becomes Jeannie Summersbee's home.
Court Lane house
Used as: A private house is used as the village art gallery.
The Old Courthouse
Used as: The medieval building appears as the Luxton Deeping bookshop.
Representative photograph of the real filming location; the exact camera angle or building may differ.Building identities are cross-checked against the Casebook's published filming-location references. A named match describes the part used on screen, not the whole village and not necessarily an interior.
Wider filming areas