The Thing

What if aliens did actually land on Earth thousands of years ago and had frozen in the Antarctic ice? What if those aliens could take over a person's body and literally duplicate that person so completely that no one would know or could tell the difference? What would you do? How would you act? That's the scenario faced by a group of researchers in Antarctica who discover that another outpost has been wiped out by murder and suicide in an attempt to stop the alien that they dug up from escaping and spreading to another unsuspecting outpost. Once the discovery is made and the first of the alien is revealed, paranoia and fear quickly mount. In the end, most of the research team is either killed by their comrades, killed directly by the alien, or killed in order to try and stop the alien from taking them over. And in the end, only two are left...

The movie version of the book was just as spooky and nervewracking, especially towards the end. Some of the book's scenes weren't featured in the movie, but it also ends with only two, Childs and McCready, alone in the Antarctic night...