A cat burglar named "The Creeper" is breaking into the estates of Causton, and an alcoholic writer threatening a "tell-all" book about his friends turns up dead.
A troubled schoolteacher subject to sleepwalking and quasi-paranoia feels that an intruder has been in her house, and doubters find dead bodies to confirm her fears.
Causton villagers take a bus trip to visit a seaside resort in Brighton, for a ceremony. A serial killer, decapitates some travelers both in Causton and Brighton. DCI Tom Barnaby's cousin, DCI John Barnaby, work together to solve the case.
A tailor dies of a heart attack. Two years later, his widow is murdered on her way to the vicarage. The vicar is also murdered after receiving a mysterious letter.
A Wild West show comes to Ford Florey and a serial killer starts to eliminate villagers in a "wild west" fashion related to a parcel of disputed swamp land.
Jeff Bowmaker runs a profitable business in Midsomer Magna conducting spooky "ghost tours" at night when the unpopular village librarian turns up dead.