Phenomena is a 1985 Italian giallo-horror film directed and co-written by Dario Argento, and starring Jennifer Connelly, Daria Nicolodi, Dalila Di Lazzaro, Patrick Bauchau and Donald Pleasence. The plot concerns an American girl at a remote Swiss boarding school who discovers she has psychic powers that allow her to communicate with insects, and uses them to pursue a serial killer who is butchering young women at and around the school.
Theatrical release poster by Enzo Sciotti
In Italian cinema, giallo is a genre of murder mystery fiction that often contains slasher, thriller, psychological horror, sexploitation, and, less frequently, supernatural horror elements.
Mondadori's 1933 translation of Edgar Wallace's 1920 novel Jack O' Judgement (rendered in Italian as Il Fante di Fiori, The Jack of Clubs), with the characteristic yellow background and the figure of a masked killer
A scene from Death Walks on High Heels (1971) showing excessive violence associated with many gialli
Anita Strindberg in The Case of the Scorpion's Tail (1971), showing giallo trademarks: a black-gloved killer's POV, vivid colour and a vulnerable young woman
Orgasmo (1969) features a female protagonist (Carroll Baker) who becomes embroiled in a psychological, sexual conflict.