First part of Pier Paolo Pasolini's "Mythical Cycle" also including Teorema (1968), Pigsty (1969) and Medea (1969).
Sophocles, the author of the original Greek tragedy on which this film is based, is given no on-screen credit.
Franco Citti was 5 years younger than Silvana Mangano and 11 years older than Luciano Bartoli, his parents in the movie.