SNOWPIERCER (2013)

In the near future, scientists release chemical CW7 to finally combat global warming - which instead starts a new ice age that kills off nearly all life.  By 2031, survivors live circling the globe on a constantly-running super-train, whose movement sustains its eco-system and therefore all life on it.  The train's also developed its own class system; the rich and powerful at the front of the train enjoying untold luxuries, the quality of life dropping as you go down the train to the general populace in the end cars - the poor, starving class beaten down by their "superiors".  It's all run by the deity-like Mr. Wilford, the mystery man at the engine - and the target of a group of rebels at the train's end led by Curtis (Chris Evans) and his wise mentor Gilliam (John Hurt); a courageous group determined to claw, scratch and kill their way to the engine and Wilford - to live as equals or not at all.  What they find along the way makes for some stunning cinema ... and a hard-to-forget film, even if the ending doesn't quite live up to the promise of all that came before. (rated R)  ****

SNOWPIERCER trailer