Complete released-series file · 2009–2010
Series 12
7 feature-length cases from the Tom Barnaby era, led by DCI Tom Barnaby with DS Ben Jones across the run.

Episodes 1–7
Year-level chronology
Principal fictional places
Expanded case files
Before you open the folder
What defines Series 12?
This run sits in the Tom Barnaby period and contains 7 cases. Its archive labels lean classic, with 4 cases carrying that tone.
- Best entry point
- The Dogleg Murders
- Opening case
- The Dogleg Murders
- Final case
- The Great and the Good
- Recurring settings
- Each principal setting appears once
Archive highlights
Three ways into Series 12
Editorial signposts drawn from the Casebook catalogue—not a claim that every murder needs a podium.
The Dogleg Murders
A killing beside Whiteoaks' notorious thirteenth hole exposes gambling, class resentment and private debts at an exclusive golf club.
Episode 1 →Casebook focus · ClassicThe Dogleg Murders
A closed-circle club mystery in which handicaps, etiquette and social rank provide both camouflage and clues.
Open the case →Filming trailSmall Mercies
4 broader filming areas are already connected to this file.
Follow the places →Who works these cases
Core cast in Series 12
Every lead detective, investigating partner and credited on-screen pathologist represented in this series.
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John Nettles
Tom Barnaby · 7 casesAn 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.
Open actor profile →Jason Hughes
Ben Jones · 7 casesA 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.
Open actor profile →Barry Jackson
Dr George Bullard · 7 casesAn 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.
Open actor profile →Complete episode ledger
Every Series 12 case
7 expanded dossiers and 0 concise catalogue records, all linked in broadcast order.
- Episode01
2009 · Whiteoaks Golf Club
The Dogleg Murders
A killing beside Whiteoaks' notorious thirteenth hole exposes gambling, class resentment and private debts at an exclusive golf club.
- Episode02
2009 · Midsomer County
The Black Book
A rediscovered Victorian landscape sells for £400,000 before its former owner is killed and another painting disappears.
- Episode03
2009 · Midsomer Parva
Secrets and Spies
A former agent is killed at a country house for retired spies, reviving a Cold War operation and the legend of a village beast.
- Episode04
2009 · Midsomer University
The Glitch
A professor warns that his valuable computer breakthrough contains a dangerous flaw, placing research ethics against commercial pressure.
- Episode05
2009 · Little Worthy
Small Mercies
A man is found bound like Gulliver in a model village, beginning a case about families distorted by secrecy and scale.
- Episode06
2010 · Chettham Park
The Creeper
A celebrated cat burglar raids Midsomer while a writer planning to expose the Chettham family is smothered on their estate.
- Episode07
2010 · Ford Florey
The Great and the Good
A sleepwalking teacher fears an intruder before two men are killed near her home during preparations for a school fundraiser.