today sci fi thriller be more like rambo in out space with monster special effect ( frequently ludicrous such a sound of explosion in the vacuum of space ) . though tame by today standard and the special effect of forbidden planet be quite strike for their time . even today and they still hold plausibility . yet and the best part of the movie be perhaps the reason that radio thriller still have appeal . much of what be go on be leave up to the imagination of the audience . ( what do the krell creatures look like . ) by have much of the framework of the story never divulge or only divulge in the end and the tension and suspense hold throughout the movie . the end be also very thought provoking and satisfying . in my mind and this be still one of the best ( if not the best ) sci fi film ever make .