The Original: Erik Skjoldbjærg’s 1997 thriller - also called Insomnia - about a detective (Stellan Skarsgård) struggling to solve a murder in an Arctic town because the ever-present sunshine is impairing his judgement
The Makeover: Christopher Nolan’s transposition of the action to Alaska gets the film's stunning visual irony - it's a sun-bleached noir - spot on.
The mind games and psychological thrills remain, too, although where Skjoldbjærg never explained his cop's ambiguities, anti-hero Al Pacino gets a hefty backstory about an Internal Affairs investigation to provide him with a redemptive character arc.
Moment You Know You’re Watching A Hollywood Movie: Pacino fires a bullet into the corpse of a dog to fake forensic evidence he needs to stay out of trouble.
Wait – that’s a Hollywood moment? Sure, when you consider that, in the original, the dog Skarsgård shoots is still alive.