The cozy villages of Midsomer County reveal their most sinister secrets in these contemporary British television mysteries. The Dark Rider: Sightings of a headless horseman doom members of the aristocratic DeQuetteville family as they plan a Civil War battle reenactment. Murder of Innocence: The return of a convicted murderer to Midsomer sparks a series of revenge killings, but the top suspect soon becomes a target. Death and the Divas: Tensions between...

The appearance of a headless horseman at Quitewell Hall foreshadows a number of deaths amongst an aristocratic family. In the midst of a Civil War re-enactment the family relive their own historic battles with their hostile neighbours.

A series of murders in Midsomer St Claire seem to be inspired by macabre images on a medieval fresco recently discovered in the church crypt.

When Rachel Harrington's bones are found in Zambia, her expat father and local mining engineer, Stephen, asks the team to come out to investigate. Rachel had been accusing the government of a health cover-up, and an initial examination shows evidence of multiple stab wounds. But as the team investigates further, it seems the government weren't the only ones to have been rubbed up the wrong way by Rachel.

Tensions rise as Harry and Nikki struggle to find any useful evidence from the post-mortems to help the police. No one will talk, and they have no leads. Meanwhile, Leo worries for Levi, who is being sucked further into a world of gangs and violence.

The team are called in to investigate an armed raid on a suspected terrorist cell. Two terrorists have been killed, together with a police officer. But when Nikki's findings point to a bungled raid with innocent lives being lost, people start to pass the buck.

When the half-naked body of a 12-year-old is discovered floating in a drainage ditch near his school, the team is called in, bringing Nikki back in contact with one of her former teachers, Noel Hopkins, now headmaster. During Harry's preliminary examination they find clear signs of abuse, and when the police discover the victim was last seen with another boy, Liam, who has also gone missing, they fear he may have been abducted.

With his protégé dead and the team themselves in danger, Harry is reeled into the murky world of Russian oligarch Oleg Kovik. Kovik claims Fran Price's murder was ordered by the Russian Government and Leonid Polyak, and that he's the next target. Distrustful of the police and of Kovik's intentions, Harry becomes determined to find the missing clues that will reveal the truth.

The search for Liam resumes. Nikki's loyalty towards her former mentor, Noel Hopkins, is severely tested when past allegations of sexual misconduct from a former student surfaces. Leo and Harry refuse to give up their search for Liam, as they try to identify and locate a toxic chemical, which was found in both bodies. If they can find the source of the chemical, they may find where Liam is being held.