10 Awesome Sci-Fi Twists You Never Saw Coming

10. Dark City - The City Is Actually A Spaceship 

There are few sci-fi films as dark as Dark City, and no, that's not a pun. The movie isn't only dark in the fact that it never shows the light of day, but it's also ominous, and the twist at the end is rather unsettling once it all comes into focus.

The movie follows John, who awakens in a room with a dead woman, and he's the only suspect, but he has few memories of his life. He does recall a few flashes, which compel him to travel to Shell Beach, which is a bright and beautiful location presented in stark contrast to the environment of Dark City.

As he's trying to make his way there, he is chased by an enigmatic group of ghoulish men, all of whom are devoid of hair (and personalities), and refer to each other as Mr. Book, Mr. Chair, or some other item attached to "Mr."

These men are seen to completely alter the nature of the city, each and every night, and John is the only person who appears to be aware of what's going on. This leads to the final conflict, which reveals with a surprising twist, that the titular Dark City is a spaceship, and all the humans "on board" are subjects of an experiment the aliens are conducting on them. They are all inhabiting the bodies of their dead, and test the nature of humanity each night by injecting memories into their subjects.

It's one of those twists you couldn't possibly have seen coming, and it makes the movie all the better for it.