Listen to this here, a history of spanish avantgarde underground: http://www.ubu.com/sound/spanish_avant.html.
If you rather feel like watching, then here’s a fantastic movie I found: http://retrovision.tv/freevideo/bigamist-the-1953.
First of all, it features the great Ida Lupino. I always liked here a lot, but I did not know that she also directed movies. Here she does. You find other movies of her on the same site, Retrovision. Just hit the Ida Lupino tag.
Voici un lien vers sa biographie sur Wikipedia (francais). Elle était tout simplement adorable!