Hell on Wheels

Season 4 opens with Cullen awaiting the birth of his baby while laboring under the Swede at Fort Smith. Meanwhile, Durant deals with the fallout from a railroad accident.

Cullen challenges the Swede while planning his exit from Fort Smith. Meanwhile, a new adversary arrives and makes his presence felt in Cheyenne.

Cullen goes back to work on the railroad and butts heads with his new boss. Meanwhile, Durant and Campbell clash over a valuable piece of real estate.

Cullen faces trouble at home as he takes railroad matters into his own hands. Meanwhile, Campbell makes a move against Durant and Mickey.

A stranger's arrival stirs up old feelings in Cullen and puts his family at risk. Meanwhile, the Swede faces consequences at Fort Smith.

Following an attack by a bear, Elam struggles to survive in a Comanche village and find his way back to Cheyenne.

Cullen attempts to reconnect with Elam upon his return. Meanwhile, Durant takes matters into his own hands while putting an old problem to rest.

Cullen makes a decision to ensure his family's safety. Meanwhile, Campbell hires a new federal marshal to clean up the streets.

Cullen goes head-to-head with the new marshal in an attempt to free his arrested railroad workers. Meanwhile, Campbell confronts Louise over a story.

An act of terror strikes Cheyenne as Cullen, Durant and Campbell negotiate toward a settlement for policing the streets.

Cullen and Durant fight to save the life of a criminal. Meanwhile, Louise tries to provide support as Ruth copes with a great loss.

Cullen grapples with Ruth's unexpected decision; Louise jeopardizes her reputation to fight for a story she believes in.

As the railroad prepares to leave Cheyenne behind in the Season 4 finale, Cullen returns to Fort Smith to retrieve his family.