Snowpiercer (2): The Explorers

The graphic novel that inspired the film:
Coursing through an eternal winter, on an icy track wrapped around the frozen planet Earth, there travels a train that never stops. This is Snowpiercer: one thousand and one carriages long. The last bastion of human civilization. Or is it? A second train travels through the snow on the same track, its inhabitants living in constant fear of crashing into Snowpiercer.