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Season guide

Midsomer Murders: Series 12

7 episodes Premiered Jul 22, 2009 Updated Sep 25, 2026
Previously on Midsomer Murders

Season 12 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of Midsomer Murders Season 11.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 12 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 12 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 12: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

57%
43%
Mytharc (4): Crucial lore & season climaxes
Core (3): Character development & subplots
Side Quest (0): Standalone / filler
S12·E1 Mytharc

The Dogleg Murders

Jul 22, 2009 · 97 min

On the Midsomer Golfclub Whiteoaks a member is killed with a golfclub. In the course of the investigation they discover Whiteoaks to be full of hatred, gambling, violence, jealousy

S12·E2 Core

The Black Book

Aug 5, 2009 · 97 min

The sale of a previously unknown painting by an 18th century painter sends Barnaby into an investigation of murders as well as art forgery.

S12·E3 Core

Secrets and Spies

Jul 29, 2009 · 97 min

A number of murders near a government safe house in Midsomer appears to be connected to a group of British spies stationed in East Berlin during the Cold War.

S12·E4 Core

The Glitch

Sep 23, 2009 · 97 min

Midsomer University science fellow George Jeffers threatens to make public a problem with his state-of-the-art invention Kernel Logic, but American software boss Clinton Finn fears

S12·E5 Mytharc

Small Mercies

Oct 28, 2009 · 97 min

Richard Tanner is found murdered in a model village, stabbed and trussed up like Gulliver in a macabre tableau. The disturbing manner of his death leads Barnaby and Jones to suspec

S12·E6 Mytharc

The Creeper

Jan 27, 2010 · 97 min

Midsomer's Chettham Park House, once owned by Sir William Chettham, has been bought by entrepreneur Jack Filby to save Sir William from financial ruin. Long-term friends dating ba

S12·E7 Mytharc

The Great and the Good

Apr 14, 2010 · 97 min

The night time peace of Badger's Drift is shattered horribly when teacher Connie Bishop screams in fright, convinced there is an intruder. Days later a local councillor, said to be

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