"Half of the film's beauty stems from is very ability on the part of both writer and director to allow the viewer to come to these conclusions themselves: nothing is explicit, and everything is ambiguous. Thus, unlike some, equally great films which more or less make the killer's identity known from the start by leaving EXTREMELY obvious clues (Deadly Strangers, Assault, I Start Counting, Scream And Die! and Schizo all spring to mind) lying around, Clemens, Fuest and Nation really do provide us with a brainteaser, in which ANY one of the principal protagonists could be the culprit if one gives time to stop and consider it. These subtleties are further underscored by the dialogue, which is still central to the plot but sparser than one would find in many films of the period, allowing the scenery- or rather the characters' perception of it- to tell the tale." - Drewe Shimon, Brit Movie