Snowpiercer is one of my favourites. Its amazing how you can take a seemingly silly idea about an apocalypse where the sole remaining human survivors are stuck on a train powered by a perpetual motion engine, and make it that good.
Also Snowpiercer is a sequel to Willy Wonka and the Chocolate Factory.
Liberal try to understand basic symbolism challenge (impossible, just make the flag red and put a hammer and sickle on it)