Who is Beta? (1972)

Who is Beta? (original Portuguese title Quem é Beta?) is a 1972 Brazilian avant-garde sci-fi film directed by Nelson Pereira dos Santos.  The film revolves around a couple in a postapocalyptic world of contaminated zombies and uncontaminated humans whose lives are thrown into turmoil by the arrival and then disappearance of a strange new woman.  It is presented here in its original Portuguese with both English and Spanish subtitles.  Also presented here is a DVD bonus feature in which director Nelson Pereira dos Santos discusses the film (which is also in Portuguese, with subtitles in both English and Spanish).