It has been a while but I seem to remember Saturn 3 being a good flick. Kirk Douglas and Farah Fawcett. http://en.wikipedia.org/wiki/Saturn_3
I saw Saturn 3 in the theater as a child... and Hector scared me to death. I had not seen the movie since then... but came across the whole film online for free and watched it again... creeps me out still... and I was just laughing because there were so many elements that were ripped off from Alien.
Which Alien I saw in the theater as a young child as well... and that creature was what “chased me home” when I was running at top speed to get back to my house from the neighbor’s at night.
For the purpose of the thread... Alien was a ground breaking Sci-Fi horror film... and sooooo many other films draw elements from it...plot devices, how to build suspense... design elements... the female protagonist... It was truly a pivotal film.