Trivia

After the success of Busco mi destino (1969), Universal Pictures hit upon the idea of letting young filmmakers make "semi-independent" films for low budgets in hopes of generating similar profits. The idea was to make five movies for low budgets ($1 million or less), not interfere in the filmmaking process and give the directors final cut. The other movies were: The Last Movie (1971), Búsqueda insaciable (1971), Naves misteriosas (1972), Locura de verano (1973).

Voted best film of the year 1971 by the magazine "Films and Filming".

Jane Fonda suggested Lee Grant for the role of Hannah.

Included among the 1001 Movies You Must See Before You Die, edited by Steven Schneider.

According to Peter Fonda in "Close Encounters with Vilmos Zsigmond (2016)", he insisted that Vilmos Zsigmond go by his real name in the credits. Prior to this film, Zsigmond had used the name William Zsigmond because he was told it was easier to pronounce.