One of the final links between the Edgar Wallace-based German krimi genre and the Italian giallo thriller, this creepy mystery stars Fabio Testi as a college professor who sleeps with his students and is blamed when a string of murders occurs. Joachim Fuchsberger, as usual, is the police inspector trying to solve the killings; Camille Keaton, Buster Keaton’s grand-niece and later the star of Meir Zarchi’s I Spit on Your Grave (1980) has a supporting role; cameraman Aristide Massaccesi, later infamous as gore director “Joe D’Amato,” turns up as a cop. Massimo Dallamano’s direction is assured. This first-rate thriller was based on Wallace’s Secret of the Green Pin. —allmusic guide
Dallamano Massimo (Milan , 17 April 1917 – 4 November 1976 ) was an Italian director and cinematographer.
Massimo Dallamano entered the world of cinema as director of photograph and participated in the first two spaghetti westerns of Sergio Leone, For a Fistful of Dollars and For a Few Dollars More under the pseudonym Jack Dalmas.
In 1968 he made his directorial debut with the Spaghetti-western Bandidos. Later he directed “La morte non ha sesso”, “Dorian Grey”, “Venus in Furs” and “What Have You Done to Solange?”