Milius and his Animal Squad storm the train; Melanie realizes something is wrong and shuts the vault doors to the engine; when Ben's life is threatened, Melanie sureenders the engine.

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.