The Avenger (1960 film)

A number of packaged disembodied heads have been found in random areas of the English countryside.

When a Scotland Yard employee is killed, Detective Mike Brixan (Heinz Drache) of Special Branch is called in to investigate.

The only clue is that a black, four-door sedan was seen at the scene of the crime and that the typewriter used by the killer has two offset characters.

While interviewing Ruth Sanders (Ina Duscha), the niece of the man killed and the last person to see him alive, while working as an extra on a film set, Brixan discovers a page of a script written on the same typewriter as the Executioner's letters.

Still, there is a sense of dark, morbid fun to the stories, and I suspect that some time in the future, another enterprising movie company will see the appeal of Wallace’s work and make their own series.