An intelligent sci-fi movie isn't necessarily hard to come by, but in a sea of thousands of alien-wrangling and space-ship-flying films, they can certainly be overlooked for their wit and progressive thinking. In other words, plenty of clever and thought-provoking sci-fi flicks are out there, many of which may change how you view the genre—while some may even make you think twice about the existence of extraterrestrial beings. In short, these aren't your average, quintessential sci-fi films.
Of course, it's not just how convincing or thought-provoking a movie is that makes it intelligent. Even the best sci-fi movies can miss the mark here. Whether it's the general storyline or even the setting, such as a dystopian wasteland set 30 years in the future, a sci-fi film can boast intelligence and cleverness in a variety of ways. Take 12 Monkeys for instance. While time travel was nothing a movie hadn't done at the time, the film's screenplay, dialogue, and setting (not to mention the acting) all work hand-in-hand to make it one hell of a mind-boggling journey. But is it the best sci-fi movie of its kind?
Be the deciding factor here and vote up your favorite intelligent sci-fi movies below, while voting down any films you feel aren't as smart or cerebral as the next. You can also add your own choices to the list.