Director: Christopher Nolan
Stars: Guy Pearce, Carrie-Anne Moss, Joe Pantoliano
Plot: Memento chronicles two separate stories of Leonard, an ex-insurance investigator who can no longer build new memories, as he attempts to find the murderer of his wife, which is the last thing he remembers. One story line moves forward in time while the other tells the story backwards revealing more each time.
The medical condition experienced by Leonard in this film is a real condition called Anterograde Amnesia, the inability to form new memories after damage to the hippocampus.
Christopher Nolan's screenplay was based on his brother Jonathan Nolan's story "Memento Mori."
According to Christopher Nolan, Carrie-Anne Moss shot her whole part for the film in eight days.
The tattoo parlor in the movie is named after Emma Thomas, who is writer/director Christopher Nolan's wife and the movie's associate producer.
Christopher Nolan's first choice for the role of Leonard was Alec Baldwin.
The camera Leonard Shelby uses is a Polaroid 690.
Carrie-Anne Moss (Natalie) and Joe Pantoliano (Teddy) worked together in The Matrix (1999). She played the role of Trinity and he played Cypher.
Guy Pearce was originally 230 lbs, before the movie was made and lost all of the weight within a few months.
After his wife's death, Sammy is shown sitting in a mental institution. Briefly, just after someone walks in front of him and before the scene cuts back to Leonard on phone, Sammy's character is actually replaced by Leonard sitting in the same chair. This supports the conclusion, that the tragic end of Sammy's story is actually an event from Leonard's own past, just as Teddy later tries to convince him.
The picture of Leonard that Leonard finds in the envelope under his motel door shows him pointing at a bare spot on his chest. He tells Natalie that this spot is reserved for when he finds John G. Later, when Leonard is driving to the tattoo parlor, he thinks about his wife, and a flashback is shown in which he is lying in bed with his wife. The bare spot in this shot now contains, "I've done it."
During Leonard's third and final conversation with the anonymous caller, his fingers hover over the numbers 555-0134. This is Teddy's phone number, which is on the bottom of his photograph, thus hinting that Leonard is actually talking to Teddy.
Before filming the scene where Leonard kills Jimmy, Larry Holden told Guy Pearce to really attack him. Pearce, a former bodybuilder, complied and left Holden covered in bruises after the scene.