Barnaby (John Nettles) returns to investigate deadly deeds and gruesome goings-on in the first four episodes from Season 13, his final season of the top rating mystery series. Unflappable detectives DCI Tom Barnaby and DS Ben Jones uncover affairs, tragedy and long-held family secrets as mystery, murder and mayhem shatter the peaceful and picturesque surroundings of the Midsomer villages once again.

The Made to Measure Murders
Milton Cross is a Midsomer village owned by Edward Milton. Many of the villagers are beholden to Milton for their livelihoods and their homes and as such do what they can to appease him. Woodley and Woodley, the local bespoke tailors, are waiting to find out if their lease will be renewed, however Sonia Woodley has found something which could jeopardise the shop. When she is found murdered, her unusual wounds perplex Bullard and Barnaby finds himself investigating a village living in fear.

The Sword of Guillaume
Barnaby joins a trip from Midsomer Parva to Brighton because he's suspicious about a deal to buy coastal land for holiday chalets by Causton's mayor. Also against the proposal is Lady Matilda William, a descendant of a French knight Sir Richard Guillaume, whose son Richard will be the last of the line because of brain damage sustained in an attack 20 years ago.
When a hated property developer and a voluptuous hotelier are beheaded, Barnaby starts to piece together the puzzle of The Sword of Guillaume.

Blood on the Saddle
Ford Florey is a town with a Wild West Society and many grudges. During a Wild West show at the local fayre, the witch on the Dunk the Witch stall is well and truly dunked. Laughter turns to horror when she does not get up and the water in the tank starts to turn red.
Barnaby and Jones need to be quick on the draw to track down the murderer.

The Silent Land
On a dark night in the village of March Magna, Barnabys wife Joyce swerves her car to narrowly miss a shadowy figure in the road. Or so she thinks. Later that night a body is discovered in the old cemetery. Did Joyce hit someone after all or was the victim, who seems to have plenty of enemies, killed by one of the villagers? Barnaby and Jones have their work cut out as all the villagers seem to be hiding something but is it murder?