Memento

Memento is a 2000 American neo noir psychological thriller film written and directed by Christopher Nolan, based on the short story "Memento Mori" by his brother Jonathan Nolan, which was published in March 2001. The film stars Guy Pearce, Carrie-Anne Moss, and Joe Pantoliano. It follows Leonard Shelby (Pearce), a man who has anterograde amnesia—resulting in the inability to form new long-term memories—who uses an elaborate system of photographs, handwritten notes, and tattoos sprawled across his body in an attempt to uncover the perpetrator who killed his wife and caused him to sustain the condition.

The film's non-linear narrative is presented as two different sequences of scenes interspersed during the film: a series in black-and-white that is shown chronologically, and a series of color sequences shown in reverse order (simulating for the audience the mental state of the protagonist). The two sequences meet at the end of the film, producing one complete and cohesive narrative.