In the late sixties Bava began reinventing the murder mystery formula he single-handedly created with films like THE GIRL WHO KNEW TOO MUCH and BLOOD AND BLACK LACE. In this film you know from the start who the killer is and so this film becomes a look into the crazed mind of a guy with childhood trauma who kills women. There's a great experimental score, cool fashions and a dance nightclub sequence for all you Sixties kitsch fans out there. Stephen Forsyth gives a great wide-eyed psycho performance and Bava forsakes his usual stylishly colored lighting for dreamy surreal imagery during the murder scenes. Bava even sticks in scenes from his earlier films on a TV as an in-joke for his fans.