Case file · Series 7, Episode 4 · Season 7, Episode 4
Sins of Commission
A literary festival gathers ambitious writers, editors and publishers before an author's apparent fall is proved to be murder.
The 60-second case card
Should I watch this one?
Publishing's polite language of prizes, advances and commissions conceals a particularly competitive village economy.
- Best for
- Literary festival · Publishing · Fraud
- Mood
- Classic
- Team
- DCI Tom Barnaby with DS Dan Scott
- 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
Publishing's polite language of prizes, advances and commissions conceals a particularly competitive village economy.
Former prize-winning writer Richard Rackham is found dead at the start of Midsomer St Michael's annual literary festival. What looks like a fall becomes murder when the examination shows his neck was broken first.
Writers, editors and publishers arrive carrying old rivalries and urgent financial interests. The deaths of Rackham's editor and another author lead Barnaby and Scott through fraudulent work, concealed authorship and people whose public literary careers depend on private arrangements.
Break the seal: reveal the finding
Who was the killer in Sins of Commission? (spoiler)
The murders protect a publishing deception and the reputations built upon it; the festival's celebration of authorship becomes the clue to who actually produced the work.
Spoiler-safe viewing companion
Three questions to carry into the episode
Three spoiler-safe questions for your rewatch.
- Place
What does Midsomer St Michael conceal?
- Theme
Which details could have more than one meaning?
- Teamwork
Watch DCI Tom Barnaby and DS Dan Scott: who notices what?
More episode detailsProduction, cast, deaths and filming information
Credits, context and checked facts
Production and cast
- TV series
- Series 7
- Episode number
- Episode 4
- Written by
- Elizabeth-Anne Wheal
- Directed by
- Peter Smith
- Listed transmission date(s)
- 18 January 2004
- Reported filming period
- August–September 2003
- Detective
- DCI Tom Barnaby
- Partner
- DS Dan Scott
- Pathologist
- Dr George Bullard · Barry Jackson
- Principal setting
- Midsomer St Michael
- Casebook tone
- Classic
Sources accompany the production credits and filming links.
Fictional settings and real filming places are listed separately. Filming links include 3 mapped areas; 2 exact sites.
Credits and archive connections
- Writer credits4 episodes credited to Elizabeth-Anne Wheal
- Director credits22 episodes directed by Peter Smith
- Release positionCase 32 of 144
- Story characterClassic · Literary festival · Publishing
- Location evidence2 exact screen-use matches
A Beaconsfield gatehouse becomes the entrance to Maplin Hall in fictional Midsomer St Michael.
Chapter One in Chesham appears as the village bookshop, while The Six Bells at Warborough supplies the local pub.
Sources for the production file
Published episode chronology and credits ↗Official ITV programme page ↗Filming-location reference index ↗Credits follow the linked chronology. Dates can differ between territories. Consult original credits for story, teleplay and adaptation wording. External synopses may contain spoilers.
Selected episode credits
Sins of Commission 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
Alex Belcourt
Donald Sumpter
Stella Gonet
Mark Umbers
Susan Engel
Rachel Bell
Michael N. Harbour
Emma Buckley
Margot Leicester
Caroline Lintott
Victoria Wicks
Robert Whitelock
Tom Mannion
Damien Lyne
The performers behind this case
Core cast
Follow the cast links for full actor and character guides.
John Nettles
Tom Barnaby · Detective Chief Inspector- Bergerac
- Poldark
- Royal Shakespeare Company
John Hopkins
Dan Scott · Detective Sergeant- Royal Shakespeare Company
- Poldark
- Horizon game series
Barry Jackson
Dr George Bullard · Police pathologist- Cathy Come Home
- Doctor Who
- Barry Lyndon
Image credits identify the licence used. No programme publicity stills are reproduced.
Forensic team
Dr George Bullard
- Credit
- Resident pathologist
- Played by
- Barry Jackson
Spoiler-controlled deaths
Deaths recorded in this case
3 people die in this case, according to the linked death record.
Break the seal: reveal the list of deaths
- Richard Rackham
Murder · Fall
Performer check- Richard Rackham: not listed in the current published cast recordNo Richard Rackham performer appears in the current published cast record.
- Neville Williams
Murder · Blunt force
Performer check- Neville Williams: Mark Umbers
- Jezebel Tripp
Murder · Stabbing or impalement
Performer check- Jezebel Tripp: Emma Buckley
Break a second seal: reveal the verified killer
Who was the killer in Sins of Commission? (spoiler)
Camilla Crofton (Katarina Poltova)Camilla killed Richard Rackham, Neville Williams and Jezebel Tripp after the group conspired to kill her to protect the Jezebel Tripp publishing deception. The resolution presents her account of self-defence separately from Sam Callaghan's later failed attempt on her life.
Verified motive
Camilla killed Richard, Neville and Jezebel in what she described as reflexive or anticipated self-defence after they conspired to murder her for threatening to expose the Jezebel Tripp deception.
Verified important clue
Archive case 32 · checked 16 September 2026The archive report naming Katarina PoltovaThe wartime report connects Camilla Crofton to Poltova and her operational training, explaining the concealed identity and why the conspirators misjudged the person they planned to kill without proving the present murders by itself.
Verified decisive clue
Archive case 32 · checked 17 September 2026The archive report identifying Camilla as Katarina PoltovaThe report establishes that Camilla is the Gulag survivor and former SOE field officer Katarina Poltova, explaining both her concealed capability and why the conspirators' attempted murder failed. The confrontation then distinguishes her account of three anticipated or reflexive self-defence killings from Sam Callaghan's interrupted attack.
Verified red herring
Archive case 32 · checked 17 September 2026Richard Rackham's apparent fall down the stairsRichard is found at the foot of the stairs and the first account treats the death as an unfortunate accident, a plausible hazard in the busy festival house. Examination shows his neck was broken before the fall, exposing the staging and beginning the trail to Camilla and the threatened Jezebel Tripp deception.
Verified death and discovery order
Archive case 32 · checked 16 September 2026- deathRichard Rackham is killed
Camilla breaks Richard's neck before staging his fall down the stairs.
- discoveryThe apparent fall becomes murder
The examination shows Richard's neck was broken before the fall, overturning the first accident theory.
- deathNeville Williams is killed
Camilla kills Neville as the publishing conspiracy and the secret behind Jezebel Tripp begin to surface.
- discoveryNeville is found on the terrace
His bludgeoned body establishes a second murder and draws attention to the festival's publishing circle.
- deathJezebel Tripp is killed
Camilla kills Jezebel after the conspirators decide Camilla must die to protect their deception.
- discoveryKatarina Poltova is identified
The investigation reveals Camilla's wartime identity and records her claim that the three killings were anticipated or reflexive self-defence.
- discoverySam's later attack is interrupted
Sam Callaghan's attempt on Camilla is stopped and remains an attempted killing rather than a fourth death.
Real place → fictional identity
Where was Sins of Commission filmed?
Chapter One Bookshop
Used as: The bookshop appears as the bookshop in fictional Midsomer St Michael.
Representative photograph of the real filming location; the exact camera angle or building may differ.
The Six Bells
Used as: The pub becomes Midsomer St Michael's village local.
Representative photograph of the real filming location; the exact camera angle or building may differ.Sources accompany the identified filming places.
Wider filming areas
