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

The golden spike, government hearings and unpredictable actions mean new beginnings and endings for the survivors.

Cullen, Durant, and Campbell try to negotiate a settlement on how the streets will be policed. An act of terror strikes Cheyenne.

Durant files an injunction against Union Pacific, threatening Cullen's position; Elam deals with a dangerous newcomer.

Cullen prepares for battle while the town celebrates.

With General Grant's deadline only two days away, a gang of riders attacks Cheyenne while Cullen and Elam pay Durant a visit.

Cullen goes head to head with the new marshal to recover his arrested railroad workers. Campbell confronts Louise over a story.

In the Season 1 finale, Cullen's past and future collide, impacting his life on the railroad.

Cullen fights to save Hell on Wheels.

Durant dispatches Cullen and Elam on a mission of vengeance. Lily struggles to find her place.

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

As Cullen plans an exit from Fort Smith, he challenges The Swede; when a new adversary arrives, Cheyenne feels his presence.

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

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.

An unexpected roadblock forces Cullen to make a difficult choice as a reporter arrives in Hell on Wheels. Elam struggles with his new boss.

Despite fighting to save his own life, Durant must try to keep the railroad from going under. Meanwhile, Cullen comes to the aid of an old comrade.

With Elam's life in the balance, Cullen must decide how much he’s willing to risk. Meanwhile Durant faces financial ruin as Lily confronts the family of her late husband.

Cullen and Mei escort precious cargo through the California wilderness; Eva nurses Louise back to health.

Cullen solves a Chinese labor strike in the wake of violence. Meanwhile, Durant pulls Mickey deeper into Union Pacific business.

Cullen is in California with the Central Pacific Railroad, and must deal with the new workers.

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

Cullen contends with violence in Chinatown set off by disgruntled railroad workers. Meanwhile, the Swede manipulates Phineas in his plot against the Mormons.

Cullen and Fong find themselves in peril as they transport a locomotive over the Sierra Nevada mountains. The Swede gains Phineas' trust.

Mickey's dirty business with Durant leaves him with blood on his hands. Meanwhile, Campbell's return to town complicates Louise's life.

Cullen's nitroglycerin experiment provides an explosive backdrop for the railroad life in Truckee. Durant's plan turns deadly.

Cullen faces life-changing decisions in Utah as Truckee adapts to life without him.

A former confederate soldier journeys to the transcontinental railroad to seek vengeance.

Unexpected violence erupts in Chinatown during the festival of Tin Hau Don; Cullen confronts the Swede; and Durant involves Maggie in his latest scheme.

In the Season 2 premiere, Durant and Lily steer the railroad further west, while Cullen and Elam land on opposite sides of the law.

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

Cullen awaits the birth of his baby, laboring under The Swede's thumb at Fort Smith. Durant deals with the fallout from a railroad accident.

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

Cullen's search for the sergeant nears its end; Durant keeps to his hidden agenda while assisting in Lily's recuperation.

Chang discovers Mei's secret and forces her to flee Truckee. Meanwhile, Cullen's search for her brings new realizations while exorcising old demons.