From Alien to 2001: A Space Odyssey, Arrival to Interstellar, these sci-fi masterpieces are perfectly directed.

Apple TV: 16 Best Sci-Fi Shows You Should Stream Right Now ...

Aliens, Arrival, Nope, Predator, Lilo & Stitch, E.T. the Extra-Terrestrial, and more make up our list of the best alien movies of all time.

It's a big universe out there, and while we're all for exploring it, a specific subgenre of science fiction movies has hinted that it might be a bad idea. Alien invasion movies have come in droves ...