More straightforward story/approach than you expect from Argento, but pretty gripping nonetheless. The usual analgam of striking/stylish shots/sets; Bianca's apartment (complete with Action Jackson Pollock wallpaper, that weird draped hallway and the rigorously dotty and symmetrical bedroom wall) has to be seen to be believed. The little girl is cute, Malden is nicely affecting, Franciscus makes for a thoroughgoing good guy, and Spaak is quite hot indeed. The XYY business got a bit silly, but...

Such an underrated Argento film. With the exception of an abrupt wrap up of the mystery behind everything, this is a really great Italian murder mystery. It has the music, the directional flair, especially the use of first person tracking shots, the murder sequences, and is completely engaging.

Can this film get any more tepid and depressing? Yes, it can - Karl and James are in it.

"Set against a backdrop of genetic research and espionage, Argento's formal obsession with allusions to seeing and sightlessness is on fierce display." - Ed Gonzalez

One of Argento's weaker thrillers, though it has a couple of bravura sequences.

A handful of really cool sequences and a great Morricone score add up to a decent Argento murder mystery, but the big reveal falls kinda flat. For a movie that is paced so deliberately, the ending rushes past too quickly. Still worth a look for giallo fans.

Early Argento is not up to Hitchcock standards yet, but he's getting there. Definitely worth a viewing.

Lots of nice photography and a decent Morricone score make this another early, solid Argento.

Disappointing entry from usually dependable (at least in this period) Argento. The biggest problem I had with it was that the plot depended on stupid character decisions ("No, I won't tell you over the phone, I'll tell you in the abandoned parking lot in murder alley at midnight, duh!") and the big reveal was wholly unsatisfying.