Ep 1. First, the Weather Changed

In the premiere episode of Snowpiercer, entitled "First, the Weather Changed," viewers are introduced to a dystopian world that has been plunged into a new ice age. The only survivors are the passengers on the Snowpiercer, a train that circles the globe on a non-stop journey, powered by a perpetual motion engine. The train is divided into class systems, with the wealthy elites living in luxury in the front of the train, while the underclass resides in squalor at the rear.

The episode opens with a voiceover explaining how the train was created in response to efforts to combat climate change, which ultimately resulted in a catastrophic global freeze. We are then introduced to Layton, a member of the tail section who is awakened from his sleep by the announcement that they are being moved to the "rearmost." He discovers that the group has been summoned to investigate a string of murders that have been committed within the tail section.

Layton is brought to the front of the train to meet with Melanie Cavill, a high-ranking member of the train's management, who enlists his help in solving the murders. As Layton begins to navigate through the different classes on the train, he makes startling discoveries about the true nature of the class system and the way that the passengers are controlled.

Meanwhile, tensions are simmering within the tail section. When a group of children are taken away from their parents, the tail section rebels and embarks on a violent demonstration, leading to a stand-off with the train's security forces. The episode ends with a shocking revelation about the purpose behind the murders and the true division of power on the train.

Overall, "First, the Weather Changed" marks a strong start for Snowpiercer, as it introduces viewers to a meticulously constructed world and lays the groundwork for the political intrigue and class struggle that drives the series. The episode is both visually stunning and emotionally gripping, setting the tone for what promises to be a must-see series.