Moon

Had chance to think and I remembered this one.
I loved this film with Sam Rockwell & directed by Duncan Jones (Bowie's son). It's a real slow burner, quiet and thoughtful. A very underrated sci-fi, should have got more awards. They don't make films like this too often. Sam's excellent and the film builds nicely, a great story.
Don't watch the trailer, you'll ruin it for yourself.