I thought I knew this film, but now I'm not sure. I saw a film back in the 80's about a satellite (SkyLab, I think) that crashes to Earth. I remember a few people, probably teenagers, who are fighting some alien threat. I also seem to remember the end of the film, when they manage to escape town, but with the alien creature coming after them.
I thought this film was called Mutant and that there was an unassociated sequel called, inspiringly, Mutant II. Of course, I expect there's another title for this movie. Can someone help?