Three years after "Castle of Blood", Antonio Margheriti comes back to direct an Horror film with another masterpiece perfectly interpreted by the "Queen of Gothic" Barbara Steele, who gives an astonishing  prove of beauty and erotism in her acting.

With his friend and Director of Photography Riccardo Pallottini, Antonio Margheriti decide to use again the magic atmosphere of black and white, and not anymore for the economical reason of the past (the B/W film was cheaper) but to replies the photographic beauty and mystery of "Castle of Blood". The use of black and white was even more justified to this film located in the 16th Century. "The Long hair of Death" was not between the favorites of Antonio which define it more an historical film then an Horror, but one day that I made some critics on some scenes which I did not liked, he warmly defended it, demonstrating that he was loving all his "Creatures" with the same passion, without making differences between them. And also the leading actress was  Barbara Steele, of which my father (I believe) had a crash when they worked together, (easily to suppose for the way he was looking at a giant photographs of her which Antonio had in his studio) also because of that "The Long Hair of Death" occupied a special place in his memory.

The title was taken from another screenplay of Ernesto Gastaldi: "La Cripta e l'Incubo" by Camillo Mastrocinque, form the novel "Carmilla" by Le Fanu. In this film there is also anoher connection with that novel, the name of the character interpreted by Barbara Steele: Mary Karnstein, the same family name of "Carmilla" by Le Fanu.