Guy Pearce (Prometheus)
Carrie-Anne Moss (Jessica Jones)
Joe Pantoliano (The Matrix)
Mark Boone Junior (Batman Begins)
Stephen Tobolowsky (Groundhog Day)
Thomas Lennon (Santa Clarita Diet)
Callum Keith Rennie (Californication)
The film starts with the Polaroid photograph of a dead man. As the sequence plays backwards the photo reverts to its undeveloped state, entering the camera before the man is shot in the head. The film then continues, alternating between black and white and color sequences.The black and white sequences begin with Leonard Shelby, an insurance investigator, in a motel room speaking to an unseen and unknown caller. Leonard has anterograde amnesia and is unable to store recent memories, the result of an attack by two men. Leonard explains that he killed the attacker who raped and strangled his wife, but a second clubbed him and escaped. The police did not accept that there was a second attacker, but Leonard believes the attacker’s name is John or James, with a last name starting with G. Leonard conducts his own investigation using a system of notes, Polaroids, and tattoos. From his occupation, Leonard recalls a fellow anterograde amnesiac: Sammy Jankis. Sammy’s diabetic wife, who wasn’t sure if his condition was genuine, repeatedly requested insulin; she hoped that he would remember having given her an injection and stop himself from giving another before she died of an overdose. However, Sammy continues to administer the injections, and his wife falls into a fatal coma.The color sequences are shown reverse-chronologically. In the story’s chronology, Leonard self-directively gets a tattoo of John G’s license plate. Finding a note in his clothes, he meets Natalie, a bartender who resents Leonard as he wears the clothes and drives the car of her boyfriend, Jimmy Grantz. After understanding his condition, she uses it to get Leonard to drive a man named Dodd out of town and offers to run the license plate as a favor. Meanwhile, Leonard meets with a contact, Teddy, who helps with Dodd, but warns about Natalie. However, a photograph instigates Leonard not to trust him. Natalie provides Leonard the driver’s license for a John Edward Gammell, Teddy’s full name. Confirming Leonard’s information on “John G” and his warnings, Leonard drives Teddy to an abandoned building, leading to the opening, where he shoots him.In the final black-and-white sequence, prompted by the caller, Leonard meets with Teddy, an undercover officer, who has found Leonard’s “John G,” Jimmy, and directs Leonard to the abandoned building. When Jimmy arrives, Leonard strangles him and takes a photo of the body. As it develops, the black-and-white transitions to the final color sequence. Leonard swaps clothes with Jimmy, hearing him whisper “Sammy.” As Leonard has only told Sammy’s story to those met, he suddenly doubts Jimmy’s role. Teddy arrives and asserts that Jimmy was John G, but when Leonard is undeterred, Teddy reveals that he helped him kill the real attacker a year ago, and he has been using Leonard ever since. Teddy points out that since “John G” is common, he will cyclically forget and begin again and that even Teddy himself has a “John G” name. Further, Teddy claims that Sammy’s story is Leonard’s himself, repressing the memory to escape guilt.After hearing Teddy’s exposition, Leonard consciously burns Jimmy’s photograph, writes a message to himself on Teddy’s photograph not to trust Teddy, and drives off in Jimmy’s car. He has Teddy’s license plate number tattooed as the second attacker, leading to his eventual death.This film will leave its own memento on your mind, and you’ll have a hard time forgetting how much you enjoyed it.