Al Pacino and Robin Williams in InsomniaINSOMNIA

In Christopher Nolan's moody, atmospheric thriller Insomnia, based on a 1997 Norwegian film of the same name, Al Pacino plays Will Dormer, a famed Californian detective now under investigation by Internal Affairs. To escape the surrounding publicity, he and his partner (Martin Donovan) are sent to a remote Alaskan town to investigate the murder of a teenage girl, found beaten to death by a killer who apparently went to great lengths - washing her hair, trimming her fingernails - to maintain the dead girl's beauty. Dormer finds his suspect relatively early, but after he becomes the catalyst in a tragic shooting accident, Dormer is increasingly haunted by feelings of guilt and remorse - egged on by the endless Alaskan sun, which shines even at night - and finds the tables turned on him; the suspected killer (Robin Williams) has witnessed the shooting, and threatens to end Dormer's career if he is fingered as the girl's killer.