Origins · eras · production craft
How Midsomer became an institution.
Move through the programme's major creative and character milestones, or isolate one of its three broad eras.
Interactive chronology
Follow the changing Casebook.
Showing 13 milestones · all eras
- Production · Foundation
Caroline Graham opens the case
The Killings at Badger's Drift introduces Chief Inspector Tom Barnaby and Sergeant Troy.
Open related file → - Screen · Foundation
The pilot airs
The first feature-length mystery establishes village beauty, social observation and concealed violence.
Open related file → - Production · Foundation
The first full series
Four further Graham stories reach television, embedding the Barnaby household and the early adaptation style.
Open related file → - People · Foundation
Troy's farewell period
The Green Man marks the closing stretch of the foundational Barnaby–Troy partnership.
Open related file → - People · Consolidation
Scott gives way to Jones
Two contrasting sergeants reshape the investigative rhythm while Tom remains the stable centre.
Open related file → - People · Consolidation
John Barnaby enters the county
The Sword of Guillaume introduces Tom's cousin before the change of command.
Open related file → - Screen · Consolidation
Tom retires
Fit for Murder closes the original lead era without killing or discrediting its detective.
Open related file → - People · Reinvention
John takes command
Death in the Slow Lane begins the new Barnaby household and Causton leadership.
Open related file → - People · Reinvention
Charlie Nelson arrives
The Christmas Haunting introduces a new partnership through a seasonal Gothic case.
Open related file → - Production · Reinvention
The 100th mystery reaches Copenhagen
Danish locations, partners and performers turn the milestone into an international case.
Open related file → - People · Reinvention
Jamie Winter joins
The Village That Rose from the Dead begins the current detective partnership.
Open related file → - Production · Reinvention
25 Years of Mayhem
The anniversary documentary revisits the adaptation, cast, locations and global audience.
- Production · Reinvention
Series 26 commissioned
Four more feature-length cases are announced, with the core team returning.
Open related file →
Why the format lasts
Each episode works as both procedural and miniature social novel.
A fresh micro-society
Clubs, festivals, heritage industries and eccentric institutions create self-contained suspect pools.
A familiar architecture
Picturesque arrivals, domestic counterpoints and an explanatory climax make the county legible.
A title built to last
Promoting the place—not one detective—made the lead handover possible.