If you're looking for a exhilarating time at the cinema, you can't go wrong with The Martian. Ridey Scott's big screen adaptation of Andy Weir's unbelievably successful novel, the film is an expertly-told story, threading three interlinked narrative together to provide a smart, rewarding experience (and Scott's best film in well over a decade). But, of course, this is sci-fi, and you can't make a movie in the genre without having some high-flying ideas working away just underneath the visually resplendent imagery (and because this is a Ridley Scott film it really is beautiful). The Martian's key focus may be more on adventure, excitement and tension than some recent deep space flicks, but it's still brimming with themes and philosophical musings. Today I'm going to take a look at film's ending and try and crack just what Scott's trying to say. Spoilers, obviously. Why was there nothing but disco music on the soundtrack? What's the point of that epilogue? What happens to Mark after the end? And what does it all really mean? Well, let's find all that out and more. For more The Martian goodness (and an answer to the big question of when the movie's set), check out the companion easter egg guide.