Best Movie (standalone) I have ever seen

Rating: 10/10 (23 December 2015)

Besides trilogies (Star Wars, Indiana Jones, etc.), I put standalones in their own category.
This movie has definite possibilities of a sequel, but I don't think it needs to. It stands completely on its own, and as for those types of movies, this is the best one I have ever seen.
Without giving anything away, the logic, combined with real-life theoretical physics, such as gravitational time-dilation (look it up online), makes for a truly new and thought-provoking concept.
Before this movie, I never thought about these types of endless possibilities and the repercussions they could have.
Even if you are not into science, or science fiction, you will love this movie, even if parts of it go over your head (though they do a fantastic job explaining details of the theories, etc.).
Space......the final frontier....?