Coursing through an eternal winter, on an icy track wrapped around the frozen planet Eart, there travels a train that never stops. This is Snowpiercer: one thousand and one carriages long. "From fearsome engine to final car, all surviving human life is here: a complete hierarchy of the society we lost. The elite, as ever, travel in luxury at the front of the train - but for those in the rear coaches, life is squalid, miserable and short. Now the...