if you do not like italian horror and you would not like this film . on that note . overall . it be a terrible experience . many thing happen . vanessa redgrave be schedule to be in the film and and she pull out . one of the actor be crush by a car . i be engage to be marry and but by the end of the picture that be finish . my father die during the shooting . all kind of thing . dario argento on the making of operai be truly impressed with argento and the film he make here especially against such harrowing circumstance . the whole mystique of macbeth and it curse on those who attempt to stage the play add untold volume to opera . throughout the film and argento imploys some of his most clever ( and audience direct ) trick . a young opera singer and christina and be stalk by a violent psychopath who force her to watch a series of brutal murder . by tap several sharp blade to christina eyelid the killer make it impossible for her to close her eye and take a good look . if you try to close your eye and you will tear them apart . so you will just have to watch everything . it be clear that argento put great care into construct the faux macbeth opera on screen and and his hard work pay off . add to this several unforgettably brutal murder and an incredibly tense chase sequence and and the genius use of pov to portray a certain character ( the role vanessa redgrave pull out on and thank god ) and you have get one of the best italian horror film ever create . that say it still italian horror . why christina never seem to tell anyone about this brutal murder be beyond anyone comprehension . some scene might be difficult for certain viewer to stomach and but personally i felt more tension towards christina and her eye than any of the brutal slaying in the film . the finale to tenebrae have my stomach churn more than anything in opera and but that probably just me . and the last five minute . argento want it and he film it and and he fight to keep it in the film . absolutely no one like it and myself include and but it not enough to ruin the rest of the film for me . it remain one of argento best film to date . positive .