A bare-knuckle brouhaha between Elam and Cullen is spurred by Durant's latest attempt to deal with the railroad's financial crisis.

A looming railroad deadline throws Cullen and Lily together; Joseph and Elam deal with what their violent mission has wrought.

Cullen struggles to maintain order while Mickey's and Sean's lives are endangered; Lily and Elam clean up a mess of their own doing.

A tragedy leads Cullen to defuse an internal threat to the railroad.

Cullen's past catches up with him and threatens the fate of the railroad.

In the aftermath of tragedy, Lily and Cullen struggle to maintain order in Hell on Wheels. Meanwhile, Elam makes plans for the future.

Cullen fights to save Hell on Wheels.