A dystopian sci-fi action film about a rebellion aboard a train carrying the last survivors of an uninhabitable future earth, Bong Joon Ho’s Snowpiercer (A-) is a corker of a thriller with twists around each and every turn. Chris Evans as the reluctant hero has never been better, and Tilda Swinton is inspired casting as a vampy villainess. Darker and artsier than most mainstream fare, this is a triumph of production design with a series of staggering moral choices that provide an adventure for the mind. Each train car unlocks amazing visual treasures or shocking discoveries, and it’s a testament to all involved at what a spectacular steampunk world has been so thoroughly rendered within its lengthy locomotion. Although it can’t quite hold its amazement through parts of the final reel, it genuinely ups the ante and delivers a robust journey. Amidst the genuine excitement of downtrodden denizens’ quest to reach the front of the train and possibly unseat the rule of a sinister regime, there is significant commentary on class structure and what people will do to survive. This is sci-fi of the first order, imagining genuine possibilities with complex and distinctive emotional grandeur.