Cullen and Elam search for their stolen food on the prairie; a stranger's arrival threatens Elam's family.

Cullen and Elam try to secure a new lumber source following a railroad accident; Durant tells Louise a secret about Cullen.

Cullen helps Elam track down a dangerous criminal; the town prepares to move down the tracks.

When a cholera epidemic hits Hell on Wheels, Cullen must find fresh water before his workers die. Durant faces political fallout.