The Avengers: Murdersville

When Mrs. Peel's friend Major Croft goes missing, she traces him to the picture postcard village of Little Storping. Unfortunately the entire population are assassins for hire who lure their victims to the village, kill them and then claim that they have never been there. Croft has been killed, along with his valet to prevent them from exposing the sinister secret and Mrs. Peel is next on the hit list unless Steed can save her.