Reunited with old friends, the train throws a party. Alliances are tested as the truth is finally revealed.
It all comes to a head as old adversaries clash, with New Eden hanging in the balance.
Alex must finally deal with her parental figures as a track obstruction uncovers a painful past.
Melanie fights for survival in treacherous conditions, vying to do what others before her could not.
As the train approaches Melanie’s retrieval point, Layton leads a furious attempt to try and pick her up but not without some sacrifices.
Mr. Wilford arrives and threatens Snowpiercer, so Melanie makes a move that can’t be undone.
An exchange is made between the two trains, but a far greater revelation might be just over the horizon.
Melanie embarks on her most dangerous mission yet, while Layton reckons with his personal choices.
