Snowpiercer

The fate of the train depends on the Big Alice locomotive. When Mr Wilford arrives and threatens Snowpiercer, Melanie makes a move that can't be undone.

Snowpiercer launches a probe into the upper atmosphere to confirm a theory. An exchange is made between the two trains, but a greater revelation might be just over the horizon.

Big Alice must help Snowpiercer navigate a treacherous route, while Melanie embarks on her most dangerous mission yet. Layton reflects on his personal choices.

As the Big Alice crew are granted shore leave on Snowpiercer, Layton and Wilford have differing opinions on the future.

Layton and Miss Audrey make a risky play for Big Alice, but Wilford has his own plans.

Mel arrives at the research station where she makes some startling discoveries while struggling to survive and thinking back to the days before the Freeze.