Which long-running British detective drama series features Detective Chief Inspector Barnaby and his sergeants solving a continuous stream of macabre murders in the seemingly idyllic but perilous villages of the fictional Midsomer county?

The beloved British detective drama that sees a continuous stream of macabre murders disrupt the seemingly idyllic villages of a fictional English county is "Midsomer Murders (Review)." This long-running series, which first aired in 1997, plunges viewers into the picturesque yet perilous world of Midsomer, where behind every charming cottage and village green lies a dark secret, scandal, or motive for murder. The show is based on the "Chief Inspector Barnaby" book series by Caroline Graham.

The series initially featured Detective Chief Inspector Tom Barnaby, portrayed by John Nettles, as the lead investigator, often accompanied by a succession of sergeants, including DS Gavin Troy, DS Dan Scott, and DS Ben Jones. After John Nettles' retirement in 2011, his character was replaced by his younger cousin, DCI John Barnaby, played by Neil Dudgeon, who continues to solve the region's baffling crimes with his own sergeants, such as DS Charlie Nelson and DS Jamie Winter. Despite the tranquil facade of Midsomer, the detectives are faced with an astonishing variety of elaborate and often darkly humorous murder methods, from pitchforks and cricket bats to more bizarre means.

"Midsomer Murders" has garnered a significant international following, broadcast in over 200 countries, making it one of Britain's most successful drama exports. Part of its enduring appeal lies in the contrast between its beautiful English countryside settings—filmed in real-life locations across Buckinghamshire and Oxfordshire—and the sinister undercurrents of its eccentric inhabitants. The show is also recognized for its distinctive theme music, which features the eerie sound of a theremin, adding to its unique charm and atmosphere.