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 and extortion.
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.
An air traffic computer system, based on theories from an eccentric college professor, is denounced by the scientist creating a financial crisis for its backers.
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.