Pay attention. Very close attention. This is one movie where you can't afford to miss a second. The maddeningly brilliant screenplay by brothers Christopher and Jonathan Nolan forces us to retrace the steps of a man with short-term memory loss who tries to hunt down his wife's killer, writing notes for himself all over his body so he cannot forget the clues he uncovers. It is an ingenious narrative device that the brothers Nolan employ, presenting us every scene in reverse order, such that we experience every scene as our forgetful sleuth does; confused and unaware of what has just happened before.
Well cast and exceptionally edited, this thriller is so tricky it keeps you guessing even after the film is over. The psychological depths it probes are just too vast to fathom once over. Multiple viewing is required!