Cullen grapples with consequences while Elam mounts a rescue attempt. Durant receives Gen. Grant and the U.P. board in Cheyenne ahead of the deadline.
With General Grant's deadline only two days away, a gang of riders attacks Cheyenne while Cullen and Elam pay Durant a visit.
After his workers defect to the Mormons, Cullen recruits Durant to help get them back. Meanwhile, Sean and Mickey's past comes back to haunt them.
When a cholera epidemic hits Hell on Wheels, Cullen must find fresh water before his workers die. Durant faces political fallout.
Durant files an injunction against Union Pacific, threatening Cullen's position; Elam deals with a dangerous newcomer.
Cullen helps Elam track down a dangerous criminal; the town prepares to move down the tracks.
Cullen and Elam try to secure a new lumber source following a railroad accident; Durant tells Louise a secret about Cullen.
Cullen and Elam search for their stolen food on the prairie; a stranger's arrival threatens Elam's family.
An unexpected roadblock forces Cullen to make a difficult choice as a reporter arrives in Hell on Wheels. Elam struggles with his new boss.
After a hard winter, Cullen and Elam travel to New York to secure their positions on the railroad as Durant fights for his legacy from prison.