High Quality Content by WIKIPEDIA articles! Memento is a 2000 American psychological thriller film written and directed by Christopher Nolan, adapted from his younger brother Jonathan`s short story, Memento Mori. It stars Guy Pearce as Leonard Shelby, a man with anterograde amnesia, which impairs his ability to store new explicit memories. During the opening credits, which portray the end of the story, it is shown that Leonard kills Teddy (Joe Pantoliano). The film suggests that this killing is vengeance for the rape and murder of his wife (Jorja Fox) based on information provided by Natalie (Carrie-Anne Moss).