At around the time of release, Executive Producer Denis O'Dell once said of using Spain to portray Cuba: "Cuba has changed radically in twenty years, But Jerez de la Frontera, Cadiz and Seville, which was a major source of Cuban architecture in the first place, have hardly been touched by time."
Director Richard Lester once described this movie as "A political film within which no one speaks about politics and a love story in which no one speaks about love."
When they cut to the Hotel Roma about forty five minutes in, the television said Channel 6, it should have said Chanel 6. It was filmed in Spain, and the movie was about Cuba.
At the start of the film, a subtitle announces "1959", indicating the year in which the story takes place. However the actual date of the last event of the film - Fidel Castro riding into Havana, marking the completion of the Revolution - was 1 January 1959. All of the preceding events must have occurred in 1958.