In 1960 New York-based producer/distributor William Mishkin dubbed a racy nine-year-old Italian opera potboiler entitled Core 'ngrato ("The Ungrateful Heart"), named after an often-covered Neopolitan song, and crowned it with a more grindhouse friendly title and an opera-free campaign. It was a late-career work from director Guido Brignone (the 1925 Maciste in Hell) and starred Carla Del Poggio (Variety Lights), American actor Frank Latimore from René Clément's Purple Noon, Tina Lattanzi (The Leopard), and Giovanna Galletti from Last Tango In Paris. The director co-wrote with Mario Monicelli (Big Deal On Madonna Street) and the one-named Steno (Dr. Jeckyll Likes Them Hot). Cameraman Silvano Ippoliti would later find frequent work with Tinto Caligula Brass.