John Carpenter delivered a masterclass in mixing sci-fi concepts with growing paranoia in The Thing.

Sinners, The Descent, Let the Right One In, and more.

The classic Alien franchise might have been complete altered if this alternate Ripley ending was released.

Quite a bit of movie magic made "Alien" the sci-fi horror classic it is -- but one of its biggest challenges was solved with a simple low-tech tactic.