The Martian (imdb rating 8.1)
By far the best of the Mars films (Red Planet, Mission to Mars, Last Days on Mars, etc, etc, etc....) and there's a big shock in it........Matt Damon is actually acting in it. Nope, it's not Jason Bourne, David Norris, Will Hunting or even Private Ryan, just a decent actor playing a brilliant part.
The premise has been done before but not as well as this. The cast is outstanding along with the story (which you really get sucked into), effects, the lot. Has to be one of the best Sci-fi / space movies ever, and one of the best I've seen. Absolutely loved it 9.5/10