The Man From Earth
by Jerome Bixby
Intelligent, thought-provoking, nothing in it can be argued with, etc.
I loved it.
Don't expect action. Don't expect sex. Don't expect top-shelf actors or top-shelf directing.
It's just a top-shelf story. If you'd rather watch a movie than read a book, but you still want all of the intelligence that you would get from a great book, you should watch this. Nothing gets diluted or watered down for the viewer, it's just straight up storytelling, with no regard for what the film buffs have to say about it. This movie isn't about the film, the money, the fame...it's about the message.
Third-favourite movie of all time, and I watch a movie almost every day.