When Terry Levene distributed this film in the late 1970s, he replaced a few of the establishing shots with those of American locations. For an establishing shot of the Rome youth center where Tanzi meets Stefano, Levine used a shot of the Manhattan nightclub "Fascination". Strangely enough, in the later Umberto Lenzi film Von Corleone nach Brooklyn (1979) (which also starred Maurizio Merli as an Italian policeman), Merli drives by the club "Fascination" after he arrives in New York.
A mostly complete 35mm print was located and reassembled by the Night Terrors Film Society in Calgary, Canada. Obtained from South Africa, it's thought to be the only remaining 35mm print of the film in existence.