If you haven't heard about it or seen the Duncan Jones directed Sam Rockwell vehicle Moon and are a fan of science fiction, I highly recommend it.
I watched it last night after a friend recommended it to me. Its precisely the sort of genuine science fiction film that rarely gets made anymore: a movie with an intelligent, patient, minimalist approach which allows story to drive the plot rather than action and special effects, using a science fiction setting to explore human nature.
The basic plot is that a helium miner (Sam Rockwell) is stuck on the Moon by himself for 3 years as he runs a mining station. His only companion is a multi-functional robot voiced by Kevin Spacey. As the film begins, Rockwell's character is getting ready to return to Earth as his 3 year contract is getting ready to expire. He leaves the base in a rover to make some repairs but gets into an accident, when he wakes up everything has changed for him.
That's all I'll say about it, and I would caution to avoid looking up any reviews or anything else that might spoil what comes next. (I don't even think I'd have wanted to see the movie's trailer beforehand.)