Directed by Mario Foglietti   Luigi Cozzi   Written by Marcella Elsberger   Mario Foglietti   Cast Robert Hoffmann ... Doctor Mara Venier ... Daniela Moreschi Gianfranco D'Angelo ... Police commissioner Erika Blanc ... Elena Moreschi Maria Teresa Albani ... Innkeeper Pupo De Luca ... Vice-commissioner Umberto Raho ... Psychiatrist Luciano Bonanni ... Bar customer Uncredited Cast Dario Argento ... Self - Host Produced by Dario Argento   Original Music by Giorgio Gaslini

Additional Info Premiere: September 18, 1973 DVD Release: January 27, 2009 Country: Distributor: Mya Communication Websites: Alternate Titles La Porta Sul Buio Production Companies Seda Spettacoli RAI Radiotelevisione Italiana (for) Distributors Mya Communication   (2009) (USA) (DVD) Rating Stats Overall Rating -- / 10 Our Rating -- / 10 Your Friends -- / 10 Male Users -- / 10 Female Users -- / 10 Site Ranking #11,294 / 21,271 Site Ranking