1x02 Prepare to Brace

Show is still going strong.

I particularly like the focus on Cavill and Layton, its pretty clear by now, that this isnot just a stretched out version of the movie - itgoes even deeper in the question of what is more important: The survival of the human race or being humane.

The show continues to portrait a situation where you actually have to choose. Because if Layton succeeds with his plan, humanity won't survive.
And that is where Cavill comes in. She isn't cruel because she wants to be, but because there simply is no alternative.
The system of the train is fragile and everything in it is needed.

The third class delivers the seemingly mostly uneducated workers, I have no idea who is in 2nd (probably the people which are hard to replace) and 1st class as a peaceful buffer-zone - since you can only have people which will never rebell near the heart of a train which is the engine.
Even the tail, although not initially planned as such has a purpose in delivering replacements for unplanned outages of workforce (and yes, I deliberately chose the word outage - since they are part of the trains system - just like we are part of our societies system).

The focus on her after the catastrophe was great for visualizing this.