Original Double bill...
ALIEN (1979)/THE FOG (1980)
Fantastic double bill. ALIEN still remains an brilliant scarefest. Just forget about any of the sequels that came after and watch as a stand alone film.
THE FOG still is as atmospheric as ever. The figures of Blake and his crew in the fog waiting outside...knocking on doors is really creepy and the fact that you don't really get a good look at those figures in the fog until the end (As in Alien) makes the film more haunting.