Season 1

In the revolution's aftermath, Layton and Melanie realize the greatest threat to their survival is right over their shoulder.

The rebel forces are on their heels when a dangerous foe joins them; a plan is hatched to take the train, but it may destroy them all.

Revolution has finally come as Layton leads the lower classes forward in armed rebellion; Melanie's house of cards collapses.

Melanie intensifies her search for Layton, who is weaponizing her secret; the Third Class faces a reckoning when Layton presents them with a choice.

Hiding out with help from his allies, Layton lays track for revolution; An engineering emergency threatens every soul on Snowpiercer.

Tensions between Third Class and First Class are boiling as Melanie stages the trial of the Snowpiercer killer, and makes a fateful decision about which side to favor.

A shocking twist in the murder investigation brings Layton and Till's manhunt to a cat-and-mouse climax, but Layton is getting too close to Melanie's big secret, which may prove the most dangerous game of all.

Layton descends into Snowpiercer's black market with Till, searching for both the killer and a valuable commodity for his revolution; Melanie stages a prize fight to distract the passengers from mounting class tension.

Layton uses his new position as train detective to investigate the murder while gathering intel for the revolution on the side; Melanie faces a resource crisis, with potentially drastic consequences for the entire train.

A grisly murder stokes the class division of Snowpiercer; Melanie deputizes a dangerous rebel to help solve the killing - Andre Layton, the world's only surviving homicide detective.

Tensions rise as a train moves through eternal blizzard, housing hundreds of people divided into classes.