One of the actresses in the film, Enrica Fico [Enrica Antonioni], went on to become Michelangelo Antonioni's wife four years later.
Niccolo sifts through many photos of women throughout the film, but the one picture he holds up and sticks on the window is an iconic shot of 1920s-30s movie star Louise Brooks; a 1928 picture taken by Eugene Richee, who worked for Paramount Pictures taking portraits of stars on the sets of many classic films until he was eventually put in charge of the main portrait gallery at Paramount.
Top-billed third in the credits, Christine Boisson is not seen nor mentioned in the first 82 minutes of the film.
Adverse word-of-mouth following 'New York Times' critic Vincent Canby's negative review of the film at the 1982 New York Film Festival led to the film being dropped by its US distributor. The film was eventually given a theatrical release in US in 1996.