Just watched the movie Cowboys & Aliens on HBO today.

The movie combines the western and sci-fi genre about a gunman who awakes in the desert with a piece of alien technology around his wrist and has no idea how it or he got there. He ends up in a town where he is a wanted man for robbery (complete with the iconic Wanted Dead or Alive poster of his face) and then the town is attacked at night by flying machines which takes some of the towns' people.

Its up to the the gunman and the remaining people to find the taken people and do battle against not only the aliens from another world but the groups of other people that they encounter.