Snowpiercer

While investigating the rocket, Ben and Till are ambushed by Animal Squad from the International Peacekeeping Forces led by Admiral Anton Milius, who also take over Snowpiercer

In a flashback, Milius' forces storm the Engine, shooting Till when she tries to warn Melanie and Miles. Audrey hits a panic button, causing Melanie to send Miles to safety and barricade herself in the Engine before Milius forces her to surrender by threatening Bennett's life.

On Snowpiercer, which is now a virtual labor camp, Bennett and Till are assigned by Milius to wire up a supposed fertilizer in the last car, but realize that it is a chemical weapon. During a failed attempt to use it against Milius, Till learns from Nima that Audrey made it to New Eden.

A week after Big Alice's departure, New Eden faces harsh weather that threatens the colony's power supply and safety while Oz finds a severed hand while out patrolling.

After Milius allows him to talk to Liana, Layton takes the deal and surrenders Big Alice. At the Silo, Wilford, having been rescued from the track scaler by Milius' forces, is revealed to be the mastermind behind Liana's kidnapping and has Mrs. Headwood collect Josie's blood for him.

Eleven months ago, Wilford is found by Milius' forces. Secretly undergoing treatment by Headwood and working to assert his authority, Wilford and Layton are sent to level 3 where Milius attempts to have them kill each other.

Three years ago, Captain Milius poisons the residents of Level 3, including the previous admiral and his own wife, and seizes power. Melanie returns to the Silo with serious concerns about Gemini's safety based on her data.

Javi survives the explosion with only a concussion and Big Alice finally reaches New Eden with the rescued Snowpiercer passengers.

Alex destroys the track switch computer and escapes with Layton's help. Using an IPF radio, Oz distracts the sniper while Till ambushes him.

Nima abandons Big Alice after removing the helm controls, leaving Melanie and Alex unable to use it to stop him. Layton's forces fight through the train and Ruth is captured and taken to Nima who offers to surrender Big Alice once Gemini has been launched if Ruth will help him to restore order.