Apart from its different opening titles obliterating shots of Paris streets, prudish Spanish version provided alternate clothed scenes whenever actress Rosalba Neri appeared naked in the Italian version. Also, The dialogue of the final telepathic conversation between Alexa and Pietro also varies substantially between the Spanish and the Italian. The Spanish is rather far-flung and poetic, expressing a new clarity of understanding due to the extremity of their circumstances, while the Italian is more direct and conventional in its resolution of the plot, especially in regard to the action of the scene.
Italian censorship visa # 59814 delivered on 1-3-1972.
The beach scenes were filmed at Plage de Vaucottes, a public beach in Vattetot-sur-Mer, France.
The villa is located in Chemin des Villas, Vaucottes, Vattetot-sur-Mer, France. The charming path which leads to the sea, runs between two cliff sides, on which stand small manor houses and luxurious villas.
At 40:00 minutes, the "Cathédrale Notre-Dame de Paris" can be seen, as well as a tour boat in the River Seine.