"It's immaculately constructed, filled to the brim with well-developed characters that are simply delightful to hate, and it's got some of the loveliest location photography of any movie from the whole decade. By all accounts, it was Bava's favorite among his films, and it's not at all hard to see why. Everything works in Reazione a catena, from the broadest elements of the story arc to the tiniest details of mise en scène, and if only one-hundredth of the films it influenced had one-hundredth of its perfection, the horror film would be a much less disreputable and more wonderful thing than has been the case." - Tim Brayton, Antagony & Ecstasy