Episode 5, specifically, might explore themes of survival, rebellion, character backstories, and the class struggle between those in the front cars (who enjoy relative luxury) and those in the tail cars (who live in squalor). Each episode likely builds on these tensions and the overarching mystery of where the train is headed and the purpose of its eternal journey.
"Snowpiercer" explores themes of class struggle, survival, governance, and the human condition. Episode 5 might delve into these themes, possibly through specific events or revelations that impact the train's social hierarchy or the characters' understanding of their world. snowpiercer s02e05 hdrip