It's the day of the Golden Globe nominations and Alejandro G. Iñárritu's latest labour of love has just collected the first of a small hoard of awards nods. The Mexican, hastily typing out a thank-you statement in a Claridge's corridor, claims to be exhausted by The Revenant's famously gruelling nine-month shoo, but to Empire's eyes he still seems plenty peppy for all the cold, wet and rampaging Arikara warriors he's just presided over. Pushed, he says his next project will involve disappearing for "a very, very large number of years". "I'm exhausted," he grins. Not so exhausted he couldn't pull back the icy curtain on his survival epic, talk through the film's inspirations and share what Birdman's Riggan would have made of it all.