Midsomer Murders, an English crime drama series based on books by Caroline Graham, is filmed mostly in the villages and towns of the rural counties of Buckinghamshire and Oxfordshire. John Nettles plays Chief Inspector Tom Barnaby of the Causton C.I.D., a laconic, down-to-earth detective who faces many ingenious and remarkable murders (usually several in each episode) amid the eccentric denizens of Middle England. For the first twenty-nine episodes Barnaby's partner in…