The village featured is Shere, Surrey.
Willard Parker (Jeff Nolan) and Virginia Field (Peggy Hatton) were married in real life from 1951 until her death in 1992.
Screenwriter Harry Spalding once said that someone said the title "as a joke" and "somehow it kind of stuck" and he always hated the title.
There is no speech until just over eight minutes into the film.
It was one of several 1960s British horror films to be scored by the avant-garde Elisabeth Lutyens, whose father, Edwin Lutyens, designed Manor House Lodge in Shere, a small property which features prominently at several points in the film.