Moon-2009-starring Sam Rockwell and, well, that's it, really. He plays a helium3 miner on the Moon, a solitary man operating a largely automated facility on a 3 year contract. His only company is the station's computer voiced by Kevin Spacey, and all seems to be going well until he makes a shocking discovery that threatens to destroy everything he believes is real.
Moon was made for $5 million and done with traditional SFX, and it looks beautiful. It feels like a Sci Fi short story brought to life on screen, and Rockwell's performance is nothing short of genius. If you missed Moon when it was in theatres, it is very worth a rental. Oh, Hell, just buy it. You won't regret it.