Midsomer Murders - 25 Years of Mayhem will shine a light on the fictional English county of Midsomer, looking at the numerous mysterious crimes and murders to befall it, as well as paying tribute to the exceptional on and off screen talent who have played pivotal roles in keeping millions of viewers glued to their screens since 1997. 

The documentary will take viewers behind the scenes of the filming of Series 23, as well as taking a trip  down memory lane with a Midsomer coach tour looking back at some of the show's iconic locations, paying homage to the beautiful but equally deadly English countryside which has played such a huge part in the success of the series.

Each year, the village of Angel's Rise hosts the Psychic Fayre. Founded by the Saint-Stephens family in memory of their late daughter, the event attracts mediums, psychics, and followers of the occult. When a body is found surrounded by ritual symbols on the eve of the festival, Barnaby must step into the spiritual world to find the killer.

The Midsomer Mummers, a company for amateur opera, is in the middle of rehearsals for a charity concert when a dead body is found at the theatre. The aim of the inquiry is to find out which person wants to be at the centre of attention.

The annual Midsomer Scarecrow Festival takes a grisly turn as bodies begin appearing on poles displayed alongside their straw creations. The investigation reveals rivalries that run deep and shows people will do just about anything to win.

Victor Karras, a manufacturer of exclusive board games, dies after falling down the stairs. It turns out he was poisoned, and his death is the start of a murder mystery weekend. When another person is found murdered, Barnaby and Winter have to find out if the victims knew something about the murderer, that would have revealed the person's true identity.

A local outcast, controversially acquitted of murder in the past, joins a post-operative heart rehab club. Then club members start dying prematurely. 

After a local photographer wins an urban myth competition with his creation of The Wolf Hunter, it unexpectedly gains a cult following. However, when a man is killed, Barnaby and Winter must investigate if this myth has become murderous reality