The Snowpiercer crew marvel as a rocket shoots through the sky, crashing nearby. Melanie sends Till and Ben to investigate. FLASH to nine months later, New Eden blooms. The calm is broken when Audrey arrives piloting a track scaler. She tells Layton, “they’re coming”, and passes out. On the outskirts of town, Zarah runs into Dr. Headwood, who is holding Liana, alongside a stranger in a camo suit –

Milius and his Animal Squad storm the train. Melanie realizes something is wrong and shuts thevault doors to the engine. However, when Ben’s life is threatened, Melanie surrenders the engine. Melanie and Ben escape their cell and engage Snowpiercer’s brakes, buying time. But Milius orders his men to breach the Market Car, creating a hostage situation with one hundred passengers freezing to death.

Layton demands to use Big Alice to rescue Liana. Ruth, now Mayor of New Eden, refuses because it’s the town’s power supply. Layton makes Javi jury-rig a solution, giving them three weeks of electricity. The town takes a vote on whether Layton can go. Layton wins the vote, but Ruth, Josie, and Alex will accompany him. On Snowpiercer, Ben and Till are repairing the Greenhouse Car. They realize the s

Big Alice catches up to Snowpiercer. Milius radios them, inviting Layton over. Sensing a trap, Layton and Josie sneak onto Snowpiercer. Nima is worried Layton will be gassed upon boarding and attempts to disarm the Greenhouse Car. However, Milius’ soldier, LION, catches him. Nima offers Lion a painkiller for his damaged lungs if he doesn’t turn him in. Nima double-crosses him, poisoning Lion and r

Layton hears the deal: Liana for Big Alice. He agrees and the trains dock at the silo. While Layton, Ben, Till, Ruth, and Alex stew in a holding room, Josie is taken to Headwood. Milius introduces his partner in crime: WILFORD. Layton attacks him and is thrown in a different cell. Alex sees Wilford privately, who takes her to Melanie’s lab, showing her their research. Ben, Till, and Ruth escape an

Nima needs more samples for his experiments, so Milius sends Wilford and the soldiers to collect. Privately, Milius tells WOLF to kill Wilford. Layton wakes up on an abandoned floor and is approached by humans with toxic gas scars. They scatter as soldiers arrive to collect skin samples. Wilford fixes the comms system and calls Milius, gloating that his soldiers aren’t loyal. As Wilford engineers

Layton blows the door to the stairwell, letting him and Wilford escape the abandoned floor. After reuniting with Melanie, they all split up. Milius catches Wilford and takes him to a breached floor to die. Instead, Wilford reveals he’s received cold augmentation and kills Milius. Melanie finds Alex and they board Snowpiercer. Melanie tells Nima the Gemini compound isn’t stable. Nima won’t listen a

Javi is alive and the bridge is safe to cross. Big Alice pulls into New Eden. Layton, Josie, and Liana sit stranded in the middle of nowhere, freezing to death, when a masked soldier appears – but it’s actually Roche to the rescue. They return to New Eden and form a plan: they know Nima wants Big Alice’s engine, so they’ll hide her on a separate track. Nima will have to manually switch the track o

Alex sabotages the track switch computer and, with Layton’s help, escapes to town hall. Till gets the drop on Ace and uses his sniper rifle to save Layton and Alex from Rat. Nima’s soldiers fire gas cannisters into the center of town and make their way to overtake Big Alice. The citizens retreat, but Melanie grabs Alex and brings her along. Melanie reveals Nima is Alex’s biological father. Alex go

Nima heads for Snowpiercer. Layton and the tailies fight their way uptrain when Ruth is captured. Nima tries to cut a deal, tells Ruth if she calls off the rebellion, she can have Big Alice after the rocket is launched. Ruth demurs and escapes back to the Market Car. Nima runs to the rocket control room and initiates the launch sequence. Then discovers Melanie and Alex trying to sabotage the rocke