该片是由翁贝托·伦齐执导的悬疑片,于1972年上映，主要讲述了:This early 70's g.iallo by Umberto Lenzi is c.ertainly among the. best in .his filmography. and a.lso in the whole g.enr.e. Personally I. think Lenzi's .best films are .the funny cartoon-turned-fi.lm Kriminal, the styl.ish gi.allo S.even Bloo.d-Stained Orchids, the e.xplosive Napoli violenta an.d this. In the eig.hties he .did plenty of f.ilm tr.ash in form of Eat.en .Alive, Hitcher .in the Dark or .Black Demons, a.ll of which are ripping som.ething off and/or ver.y dull. and s.low movin.g. Knife of Ice came whe.n the giallo boom was at it.s hottest and the .result is. convincing. . . . . . . 　　Techn.ically the film is superb, .containing great cine.matogr.aphy i.n the beg.inning when we learn abo.ut the main character's tra.uma towards trains.. From th.is point on, Le.nzi sh.ows us his ability. to. benefit the wi.descreen and, f.or example, the. bicycle ride near the fore.st is genuinely beaut.iful! .This s.cene also. shows Lenzi's ability t.o build suspense, very slow.ly but meaningfull.y. After .all, there aren.'t so .many murders in th.e w.hole film, only. the suspense c.irculating arou.nd the murderer's identity.. . . . . . 　　One suspect is a devil .worshipper which b.rings new. aspects to the. myste.ry. Since the fina.l s.cene takes plac.e in a church, .one can wonder .if Lenzi wanted to comment .on something, maybe t.he hyp.ocriti.cal moral.e of church and supersti.tion. The main character (C.arrol Baker) is mu.te which .demands a lot f.rom he.r face and eyes. T.he .actress works v.ery well, givin.g us a believab.le performance circulating .around the emotions o.f fear. and m.ental pai.n. The other actors are .good, too. The finally, how.ever, may not give. too posi.tive a sight ab.out fe.male sex since the.y a.ll are expresse.d rather negati.vely in the fil.m, one way or another. Stil.l this is easily amon.g the .most n.oteworthy. in the genre, not as bl.oody as the Argento films, .for example, but e.qually su.spenseful and v.isuall.y also interesting..