This was the third Larraz title I've watched after VAMPYRES (1974) and THE COMING OF SIN (1978) and will be promptly followed by another, THE HOUSE THAT VANISHED aka SCREAM
AND DIE! (1973); it's his second best-regarded effort after VAMPYRES itself and, in retrospect, a reputation that's fully deserved.
Even so, the film is hardly the heady brew of erotica and visceral thrills that was the latter (though it contains similar lesbian undertones and the occasional outburst of shocking violence) but rather a deliberately-paced mood-piece in fact, it might best be described as REPULSION (1965) in the countryside (with all the inherent eeriness that such a remote setting entails)! In any case, relying as it does on fleeting frissons (the subtle appearance of a 'mysterious' woman roaming the mansion), admirably-sustained tension (the connotations involving Peter Vaughn's character and, of course, the various murder sequences) and a carefully-deployed central puzzle (which keeps us guessing down to the very penultimate shot!), the film is surely a testament to Larraz's versatility within a genre which had all but turned stale by this time (even more so vis-a'-vis the then-crumbling British movie industry).
Interestingly, the lead role is played by Angela Pleasence daughter of horror icon Donald; just because she's his spitting image, the actress' odd looks are perfect for her mentally unbalanced character (though I doubt Larraz intended it to be a serious case history, there is the singular fact of SYMPTOMS being one of the competing entries at that year's Cannes Film Festival to consider!). Equally thoughtful was the selection of the other principal cast members: the aforementioned Peter Vaughan's burly and stern handyman could, at first glimpse, have been played by just any heavy-set person but there's no denying that the part benefits immensely from his experienced presence; and pretty Lorna Heilbron (from THE CREEPING FLESH [1973]) as Pleasence's housemate, with short-cropped hair suggesting the then-fashionable androgyny. Affable character actor Raymond Huntley, a veteran of many a British comedy, plays the owner of the village drugstore in what proved to be his last film.
Incidentally, this was yet another picture bafflingly M.I.A. on DVD as we speak which I recently acquired on DVD-R i.e. I've had to make do with a full-frame edition culled from TV with forced Spanish subtitles to boot
but which is appropriate in this case, since the director actually hails from that country!