Lucia Bose was an Italian actress who did not speak fluent Spanish. For this film, all of her dialogue was dubbed by another actress.
The car Maria and Juan are in when they hit the cyclist is a 1952 Fiat 1400.
The red-nosed clown at the circus is wearing a makeup style made famous by Emmett Kelly's clown, Weary Willie.
This film is part of the Criterion Collection, spine #427.
Part of the storyline, where an adulterous couple are involved in a fatal accident and then flee, would be seen in The Bonfire of the Vanities (1990), based on the novel of the same name by Michael Cristofer and published in 1987.