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 and attempts to disarm the Greenhouse Car.

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.