In episode 10, we reach the end of Snowpiercer’s season 1 revolution. The train hasn’t completed a full revolution across the Earth’s surface this season, but maybe we’ll make it the rest of the way in S2. S1 began with Snowpiercer somewhere between Alaska and Vancouver, BC, CA, then followed the train down through South America. It ends as the train approaches its own Mile Zero in Chicago. The train slows down and marks this moment on every revolution, because it’s where the passengers lives were saved but at the same time many, many other lives were lost.
It’s also where Melanie pirated the train from Mr Wilford more than 7 years ago. This is their first time passing through Chicago when everyone on the train knows it. As First and Second are mired in post revolution chaos, Third and the Tail enjoy the freedom to slow down and explore the entire train, rather than just struggle to survive. But a few Wilford diehards haven’t given up hope that their demi-god is alive and out there somewhere.