 Averaging a murder every ten minutes , Tenebrae ranks as one of Argento 's bloodiest films . In the United Kingdom , the film was shorn of five seconds of " sexualized violence " by the British Board of Film Classification prior to its theatrical release , on 19 May 1983 . The advertising campaign for Tenebrae featured posters and a soundtrack sleeve depicting a woman with her throat cut , blood dripping from the wound . According to Jones , who worked for Tenebrae 's distributor at the time , in the UK the posters had to be recalled after the London Underground refused to run them . New posters were issued that replaced the image of the wound and blood with a red ribbon . A similar change was made to the soundtrack sleeve . 
