Do I need to sum up The Martian?  Who hasn't read or seen this by now?  Okay, fine.  During a mission to Mars, things go horribly wrong, and astronaut Mark Watney gets left for dead on the Martian surface, with only limited supplies, and a long time until help comes.  How good can a movie be focused on a single guy talking to himself for two hours?  Fortunately, better than that sentence...