content: This movie is excellent. It combines an interesting idea that is enhanced by the cinematographic execution of the narrative. It is a murder mystery with a twist. The movie is played in reverse chronological order with the occasional flash-back (which is a flash-forward in the movie time line) that gives you the perpsective of the hero (Leonard). He suffered a brain injury during a crime and remembers everything before the crime, but after it has no long term memory. He can only recall things that happened within minute or so. This means he has to make notes to give himeself cues and clues as to his current history as he tries to discover who murdered his wife.This is a movie you are going to want watch more than once.