Dario Argentos The Cat O Nine Tails (1971) is the second entry in his animal trilogy, starring James Franciscus and Karl Malden as unlikely investigators drawn into a string of murders tied to a genetics research institute. More mystery-driven than Argentos later gialli, the film blends investigative crime with bursts of stylized violence.

Arrow Films

Following the success of his debut feature, The Bird with the Crystal Plumage, distributor Titanus tasked writer / director Dario Argento with delivering a follow-up in short order. The resulting film, granted a greatly enhanced budget and heralded in its US marketing campaign as nine times more suspenseful than its predecessor, was The Cat O Nine Tails.

When a break-in occurs at a secretive genetics institute, blind puzzle-maker Franco Arnò (Karl Malden, Patton, One-Eyed Jacks), who overheard an attempt to blackmail one of the institute s scientists shortly before the robbery, teams up with intrepid reporter Carlo Giordani (James Franciscus, Beneath the Planet of the Apes) to crack the case. But before long the bodies begin to pile up and the two amateur sleuths find their own lives imperilled in their search for the truth. And worse still, Lori (Cinzia De Carolis, Cannibal Apocalypse), Franco s young niece, may also be in the killer s sights...

This second entry in the so-called Animal Trilogy found Argento further refining his distinctive style and cementing his reputation as the master of the giallo thriller. Co-starring Catherine Spaak (Il Sorpasso) and Rada Rassimov (Baron Blood), and featuring another nerve-jangling score by the great Ennio Morricone (The Bird with the Crystal Plumage, The Good, The Bad and the Ugly), The Cat O Nine Tails remains one of Argento s most suspenseful and underrated films.

Från IMDB:
A reporter and a blind puzzle writer investigate a series of murders connected to a pharmaceutical compan