The majority of films I watched fades from my memory very easily. But sometimes they impress me deeply and stuck in my mind permanently, make me reflect on  the plot and recommend it to friends. My sister prefers not to watch films before they've been viewed by me. I'm a kind of homemade movie critic. 

Moon, directed by Duncan Jones (son of D.Bowie, by the way), with a soundtrack written by Clint Mansell,  is a poignant, intelligent science fiction film full of challenging and disturbing ideas that make you think. This one-person drama shows our solitude, our replaceability, the importance of our feeling that might be an illusion. 

It is a near future. The main character, Sam Bell, is an only occupant of a fully automated mining base on the surface of the Moon and is ready to get back to Earth, to his family. He is on the final stretch of his tree-years contract, tired and unhinged. Sam can only talk to a computer, Gerty. Direct communication with Earth is not possible due to a damage of a satellite, but he gets an occasion recorded messages from his wife. 
Feeling lonely, deprived of communication, he becomes to talk to himself almost all the time, even with his plants.  Sam has started hallucinating and on his way to a broken-down harvester he sees someone and crashes his vehicle. 
When he wakes up in an infirmary he can't remember the accident.  Sam find out that Gerty can have real-time conversations with Earth and despite been healthy Sam doesn't allowed to go and fix the harvester. Investigating the situation he discovers someone who looks just like him in crashed harvester outside. Sam revealed he is a clone created from the original Sam Bell. After a three year cycle every clone are incinerated in believe to be for a return trip to earth. 
When the two Sams search the station they find a room full of inactive clones waiting for the moment to start a new cycle. 

The film is devastating, tells us that human being is disposable resource, that an individual is completely insignificant to corporations and institutions. We are not special, someone with the same skills can replace us. Sam lives his tree-year life over and over again convinced in his importance, waits for the end of the turn to come back home to his family without knowing that his life is fully mapped out. 
Interestingly, every day Sam wakes up in the morning from the song  ‘The One and Only’ .