This film has never been released in English.
The film re-uses footage from The Spy Who Loved Flowers (1966), which had been released a year before, particularly that of scenes with Roger Browne arriving in Paris and Geneva, as well as using the soundtrack score originally composed for SuperSeven Calling Cairo (1965) by Angelo Francesco Lavagnino. It even uses the same airplane interior set originally depicted in the latter's final scene.
Final film of Olga Solbelli.
Angela De Leo's debut.