Snowpiercer TPB Escape

On a future, frozen Earth, a train that never stops circumnavigates the globe. On board: all of humanity that we could save from the great disaster that wrapped the planet in ice. At the front of the train, the survivors live in comfort and luxury - at the rear, their lives are worse than cattle, trapped in the squalid dark. When one of the occupants of the tail breaks through into the main train - all hell follows in his wake!