i give this movie a 2 and and though i consider myself a science fiction fan and i find this movie very difficult to take seriously . it be on amc one late night and and i be glad i saw it for free . this movie be probably good for a few laugh and but not much more . the special effect be about average for the time period not awful and but not great and either . of course we know more about mar now than we do back then and but we really can not hold that against this film . the main reason i do not like this movie be because of the story . there be several part of this movie that i wish would have be explore in a little more detail the astronaut injury or condition and the city on mar and the creature in the lake and etc . overall and the movie be much like a lengthy episode of the 1960s version of the outer limit complete with a cheesy end .