28: 2001: A Space Odyssey (1968). Kubrick's film of the book by Arthur C. Clarke is to some nowadays rather dull...I still find it amazing. A film that says in essence we are more than mere matter or even animals....we are Intelligence itself. Held by some rightly to be the greatest science fiction film of all time.
Back to the Future Part II (1989) (watched 21/10/15) After visiting 21/10/2015, Marty McFly must repeat his visit to 1955 to prevent disastrous changes to 1985... without interfering with his first trip.